Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device, which sequentially comprise, along an optical axis from a first side to a second side: a first lens with negative optical power; a second lens with optical power; a third lens with optical power; a fourth lens with positive optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power; an eighth lens with optical power; and a ninth lens with optical power; wherein the fifth lens and the sixth lens are cemented to form a first cemented lens, and the fifth lens and the sixth lens have opposite positive and negative properties of optical power; the seventh lens and the eighth lens are cemented to form a second cemented lens, and the seventh lens and the eighth lens have opposite positive and negative properties of optical power.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device. BACKGROUND

[0002] In people's daily life, cars as an essential means of transportation occupy an important position. Among them, the vehicle-mounted lens as a kind of car product that can connect reality and virtuality plays a very important role in driving safety. Reliable vehicle-mounted lenses not only can provide all-round safety guarantee, but also can improve user experience.

[0003] At present, in order to realize more functions, the car which has integrated countless parts needs to further increase the integration, which also puts forward more miniaturization requirements for car products including vehicle-mounted lenses. In addition to the requirement of miniaturization, other needs of vehicle-mounted lenses also arise. For example, the main working wavelength band of the existing vehicle-mounted side-view lens is relatively single, which can only maintain good imaging performance in one of the infrared wavelength band and the visible light wavelength band. With the continuous iteration and upgrading of intelligent driving technology, the vehicle-mounted side-view lens needs to adapt to different working environments, thereby generating the demand for improving the working wavelength range of the vehicle-mounted side-view lens. For another example, the improvement of the imaging resolution of the vehicle-mounted lens often needs the cooperation of materials, structures, architectures and other aspects. In this process, it is often difficult to balance the demand for imaging resolution and the demand for miniaturization, especially for vehicle-mounted lenses with more lenses in the architecture. Not only is it difficult to miniaturize, but also the sensitivity is improved due to the more lenses, which leads to the difficulty in improving the imaging resolution.

[0004] In summary, how to simultaneously realize the expansion of the working wavelength of the vehicle-mounted lens (such as covering visible light and infrared light in the working wavelength band), miniaturization and high resolution is one of the important technical bottlenecks faced by the present research and development stage of vehicle-mounted lenses. SUMMARY

[0005] The first aspect of the present application provides an optical lens, which includes, in order from the first side to the second side along the optical axis, a first lens with negative optical power, a second lens with optical power, a third lens with optical power, a fourth lens with positive optical power, a fifth lens with optical power, a sixth lens with optical power, a seventh lens with optical power, an eighth lens with optical power, and a ninth lens with optical power. The first side surface of the first lens is convex, and the second side surface is concave; the first side surface of the second lens is concave; the first side surface of the third lens is convex; the first side surface of the fifth lens is convex; the second side surface of the sixth lens is concave; and the first side surface of the seventh lens is convex. The fifth lens and the sixth lens are cemented to form a first cemented lens; the positive and negative optical power properties of the fifth lens and the sixth lens are opposite; the seventh lens and the eighth lens are cemented to form a second cemented lens; the positive and negative optical power properties of the seventh lens and the eighth lens are opposite; and the number of lenses with optical power in the optical lens is nine. The optical lens satisfies the following requirements: 5.7≤TTL / F≤8, 0.28≤R1 / FOV≤0.6, 0.15≤F×(1 / F56+1 / F78+1 / F9)≤0.65, and 0.18≤F×(1 / F2+1 / F3+1 / F4)≤0.42; wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, R1 is the radius of curvature of the first side surface of the first lens element, FOV is the maximum field of view of the optical lens, F56 is the effective focal length of the first cemented lens, F78 is the effective focal length of the second cemented lens element, F9 is the effective focal length of the ninth lens element, F2 is the effective focal length of the second lens element, F3 is the effective focal length of the third lens element, and F4 is the effective focal length of the fourth lens element.

[0006] According to an exemplary embodiment of the present application, the second lens has negative optical power, its first side surface is concave, and its second side surface is convex; or, the second lens has negative optical power, its first side surface is concave, and its second side surface is concave; or, the second lens has positive optical power, its first side surface is concave, and its second side surface is convex.

[0007] According to an exemplary embodiment of the present application, the third lens has positive optical power, its first side surface is convex, and its second side surface is concave; alternatively, the third lens has positive optical power, its first side surface is convex, and its second side surface is convex; alternatively, the third lens has negative optical power, its first side surface is convex, and its second side surface is concave.

[0008] According to an exemplary embodiment of the present application, the first side surface of the fourth lens is convex, and the second side surface is convex; or, the first side surface of the fourth lens is convex, and the second side surface is concave; or, the first side surface of the fourth lens is concave, and the second side surface is convex.

[0009] According to an exemplary embodiment of the present application, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; alternatively, the fifth lens has positive optical power, its first side surface is convex, and its second side surface is concave; alternatively, the fifth lens has negative optical power, its first side surface is convex, and its second side surface is concave.

[0010] According to an exemplary embodiment of the present application, the sixth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; alternatively, the sixth lens has negative optical power, its first side surface is convex, and its second side surface is concave; alternatively, the sixth lens has positive optical power, its first side surface is convex, and its second side surface is concave.

[0011] According to an exemplary embodiment of the present application, the seventh lens has positive optical power, and its first side surface is convex, and its second side surface is convex; alternatively, the seventh lens has negative optical power, and its first side surface is convex, and its second side surface is concave.

[0012] According to an exemplary embodiment of the present application, the eighth lens has negative optical power, and its first side surface is concave, and its second side surface is convex; alternatively, the eighth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; alternatively, the eighth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; alternatively, the eighth lens has positive optical power, and its first side surface is convex, and its second side surface is concave.

[0013] According to an exemplary embodiment of the present application, the ninth lens has negative optical power, and its first side surface is convex and its second side surface is concave; or, the ninth lens has positive optical power, and its first side surface is convex and its second side surface is concave; or, the ninth lens has negative optical power, and its first side surface is concave and its second side surface is concave; or, the ninth lens has negative optical power, and its first side surface is concave and its second side surface is convex; or, the ninth lens has positive optical power, and its first side surface is concave and its second side surface is convex.

[0014] According to an exemplary embodiment of the present application, the first cemented lens has positive optical power.

[0015] According to an exemplary embodiment of the present application, the second cemented lens has positive power.

[0016] According to an exemplary embodiment of the present application, the center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, the center thickness d13 of the seventh lens, the center thickness d14 of the eighth lens, and the total optical length TTL of the optical lens satisfy the following: 0.23≤(d10+d11+d13+d14) / TTL≤0.42.

[0017] According to an example embodiment of the present application, the optical lens satisfies 0.03≤d(L2~L8) / TTL≤0.095, where d(L2~L8) is the sum of the center thicknesses of all air gaps between the second lens and the eighth lens, and TTL is the total optical length of the optical lens.

[0018] According to an example embodiment of the present application, the first side surface curvature radius R9 of the fifth lens, the first side surface curvature radius R13 of the seventh lens, and the second side surface curvature radius R12 of the sixth lens satisfy: 0.65≤(R9×R13) / (R12×R12)≤1.35.

[0019] According to an example embodiment of the present application, the second side surface sagitta SAG6 of the third lens and the first side surface sagitta SAG7 of the fourth lens satisfy: 0.2≤|SAG6 / SAG7|≤5.5.

[0020] According to an example embodiment of the present application, the effective focal length F56 of the first cemented lens and the total effective focal length F of the optical lens satisfy: 3.5≤F56 / F≤13.5.

[0021] According to an example embodiment of the present application, the effective focal length F78 of the second cemented lens and the total effective focal length F of the optical lens satisfy: 1.0≤F78 / F≤5.5.

[0022] According to an example embodiment of the present application, the total image height H of the optical lens, the radian value θ of the maximum field angle of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.7≤(H / 2) / (F×tan(θ / 2))≤0.9.

[0023] According to an example embodiment of the present application, the focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1.7≤F4 / F≤6.8.

[0024] According to an example embodiment of the present application, the full aperture D of the optical lens, the total image height H of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: 0.85≤D / H / θ≤1.45.

[0025] According to an example embodiment of the present application, the focal length F56 of the first cemented lens and the focal length F78 of the second cemented lens satisfy: 1.15≤F56 / F78≤12.

[0026] According to an example embodiment of the present application, the center thickness d89 of the air gap between the eighth lens and the ninth lens and the total effective focal length F of the optical lens satisfy: 0.01≤d89 / F≤0.35.

[0027] According to an example embodiment of the present application, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.55 ≤ F / ENPD ≤ 1.75.

[0028] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0029] 0.1 ≤ (d10+d11) / TTL ≤ 0.175; 0.115 ≤ (d13+d14) / TTL ≤ 0.25; 0 < d56 / TTL ≤ 0.02; 0.6 ≤ F / H ≤ 0.8; 2.8 ≤ TTL / H / θ ≤ 4; 0.57 ≤ (F x θ) / D ≤ 0.8; 3.5 ≤ R1 / F ≤ 7.2; -50 ≤ R5 / (R6+d5) ≤ 1.5; -2.4 ≤ F1 / F ≤ -1.35; -15 ≤ F4 / (dn / dt(4)) ≤ -2.5; 3 ≤ |F2 / F|; 3.5 ≤ |F3 / F|; -7.5 ≤ F5 / F6 ≤ -0.5; -3 ≤ F7 / F8 ≤ -0.08; 25 ≤ |Vd7-Vd8| ≤ 50; -1.4 ≤ R2 / R3 ≤ -0.125; -0.8 ≤ F1 / R1 ≤ -0.1; 1 ≤ max {R9, R12, R13} / min {R9, R12, R13} ≤ 1.75; 0.7 ≤ R9 / F ≤ 2.5;

[0030] wherein d10 is the center thickness of the fifth lens, d11 is the center thickness of the sixth lens, TTL is the total track length of the optical lens, d13 is the center thickness of the seventh lens, d14 is the center thickness of the eighth lens, F is the total effective focal length of the optical lens, H is the full image height of the optical lens, θ is the radian value of the maximum field angle of the optical lens, D is the full aperture of the optical lens, R1 is the first side curvature radius of the first lens, R5 is the first side curvature radius of the third lens, R6 is the second side curvature radius of the third lens, d5 is the center thickness of the third lens, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, dn / dt(4) is the relative refractive index temperature coefficient of the fourth lens under the temperature condition of 20-95°C, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, Vd7 is the Abbe number of the seventh lens, Vd8 is the Abbe number of the eighth lens, R2 is the second side curvature radius of the first lens, R3 is the first side curvature radius of the second lens, R9 is the first side curvature radius of the fifth lens, R10 is the second side curvature radius of the fifth lens, R12 is the second side curvature radius of the sixth lens, R13 is the first side curvature radius of the seventh lens, d56 is the center distance between the second side of the fifth lens and the first side of the sixth lens.

[0031] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0032] 6.2≤TTL / F≤7.5, 0.3≤R1 / FOV≤0.55, 0.2≤F×(1 / F56+1 / F78+1 / F9)≤0.6, 0.195≤F×(1 / F2+1 / F3+1 / F4)≤0.38; 0.265≤(d10+d11+d13+d14) / TTL≤0.38; 0.04≤d(L2~L8) / TTL≤0.085; 0.7≤(R9×R13) / (R12×R12)≤1.25; 0.24≤|SAG6 / SAG7|≤4.25; 4≤F56 / F≤12; 1.15≤F78 / F≤4.5; 0.8≤(H / 2) / (F×tan(θ / 2))≤0.88; 1.85≤F4 / F≤5.8; 1.0≤D / H / θ≤1.2; 1.35≤F56 / F78≤9.6; 0.012≤d89 / F≤0.25; 1.6≤F / ENPD≤1.68; 0.115≤(d10+d11) / TTL≤0.16; 0.13≤(d13+d14) / TTL≤0.22; 0<d56 / TTL≤0.01; 0.65≤F / H≤0.75; 3.25≤TTL / H / θ≤3.6; 0.65≤(F×θ) / D≤0.72; 3.8≤R1 / F≤6.85; -35≤R5 / (R6+d5)≤1.2; -2.2≤F1 / F≤-1.5; -12≤F4 / (dn / dt(4))≤-3.2; 3.5≤|F2 / F|≤120; 4.5≤|F3 / F|≤400; -6≤F5 / F6≤-0.72; -2.6≤F7 / F8≤-0.095; 30≤|Vd7-Vd8|≤45; -1.2≤R2 / R3≤-0.15; -0.6≤F1 / R1≤-0.2; 1.02≤max {R9, R12, R13} / min {R9, R12, R13}≤1.5; 0.85≤R9 / F≤2;

[0033] TTL / F, FOV / 2, H / 2, D / 2, ENPD, R1, R2, R3, R5, R6, R9, R12, R13, F56, F78, F1, F2, F3, F4, F5, F6, F7, F8, F9, d5, d10, d11, d13, d14, d89, d56, d(L2~L8), SAG6, SAG7, dn / dt(4), Vd7, Vd8.

[0034] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0035] 6.6135≤TTL / F≤7.0335, 0.3486≤R1 / FOV≤0.5000, 0.2592≤F x (1 / F56+1 / F78+1 / F9) ≤0.5524, 0.2227≤F x (1 / F2+1 / F3+1 / F4) ≤0.3491; 0.2800≤(d10+d11+d13+d14) / TTL≤0.3445; 0.0496≤d(L2~L8) / TTL≤0.0800; 0.7500≤(R9 x R13) / (R12 x R12) ≤1.1481; 0.2795≤|SAG6 / SAG7|≤3.6783; 4.8446≤F56 / F≤10.8963; 1.3049≤F78 / F≤3.9664; 0.8258≤(H / 2) / (F x tan(θ / 2))≤0.8623; 2.0226≤F4 / F≤5.0697; 1.0180≤D / H / θ≤1.0221; 1.5805≤F56 / F78≤8.3446; 0.0150≤d89 / F≤0.2063; 1.6≤F / ENPD≤1.68; 0.1272≤(d10+d11) / TTL≤0.1489; 0.1500≤(d13+d14) / TTL≤0.1957; 0

[0036] TTL / F=FOV / 2H=θ / 2D=ENPD / 2R1=R2=R3=R5=R6=R9=R12=R13=F56+F78=F1+F2+F3+F4+F5+F6+F7+F8+F9=d5+d10+d11+d13+d14+d89=d56=d(L2~L8)=SAG6=SAG7=dn / dt(4)=Vd7=Vd8

[0037] An electronic device comprising the optical lens in the above example embodiments; and at least one of an imaging element and a light source; wherein the imaging element is configured to convert an optical image or optical information formed by the optical lens into an electrical signal; and wherein the light source is located on the second side of the optical lens, and light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0038] The optical lens according to the embodiment of the present application adopts nine lenses with optical power, wherein the first lens has negative optical power, the first side is convex, and the second side is concave; the second lens has optical power, the first side is concave; the third lens has optical power, the first side is convex; the fourth lens has positive optical power; the fifth lens has optical power, the first side is convex; the sixth lens has optical power, the second side is concave; the seventh lens has optical power, the first side is convex; the eighth lens has optical power; the ninth lens has optical power; the fifth lens and the sixth lens are glued to form a first glued lens, the signs of the optical powers of the fifth lens and the sixth lens are opposite in positive and negative attributes; the seventh lens and the eighth lens are glued to form a second glued lens, the signs of the optical powers of the seventh lens and the eighth lens are opposite in positive and negative attributes.

[0039] Light rays are divergent at the first lens and then enter the second lens. The convex design of the first side surface of the first lens is conducive to controlling the lens aperture size and achieving large-angle light collection, increasing the system light quantity and improving the illumination. In addition, by controlling the ratio of the first side surface curvature radius R1 of the first lens to the maximum field of view FOV of the optical lens, i.e. 0.28≤R1 / FOV≤0.6, the lens front end aperture size and the light quantity can be balanced, the small aperture of the lens front end can be met, and the illumination can also be considered, allowing more incident angle light to enter the lens. The concave design of the second side surface of the first lens is convenient for processing the lens surface dust problem, and can reduce the lens volume and cost under the condition of meeting the assembly requirements. Furthermore, the concave design of the second side surface of the first lens is also conducive to smooth transition of light, which can improve the resolving power to some extent. The first side surface of the second lens is concave, which can smoothly receive the light emitted by the first lens, reduce the light energy loss and improve the illumination, and reduce the system sensitivity with a small deflection. The light emitted by the second lens enters the third lens. The first side surface of the third lens is convex, which can better receive the light emitted by the second lens and simultaneously deflect and converge the light, reduce the light height, and thus reduce the volume of the lens and the cost. The light emitted by the third lens enters the fourth lens. The positive focal length feature of the fourth lens makes the fourth lens have a great effect on chromatic aberration and thermal compensation, and then has good imaging effect in the infrared and visible light ranges. Further, by controlling the total effective focal length F of the optical lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, and the effective focal length F4 of the fourth lens to meet 0.18≤F×(1 / F2+1 / F3+1 / F4)≤0.42, the light can be expanded to a certain extent first, and then smoothly converged in the process of sequentially passing through the second lens, the third lens and the fourth lens, which is conducive to the lens to meet the small aperture of the front end, consider the large angle imaging and low sensitivity. The light emitted by the fourth lens enters the fifth lens. The convex design of the first side surface of the fifth lens can reduce the system aberration and improve the resolving power. The light emitted by the fifth lens enters the sixth lens. In the case that the fifth lens and the sixth lens are cemented to form a first cemented lens, the second side surface of the sixth lens is designed as a concave surface, which can diverge the light and raise the light height, thereby expanding the image surface and allowing more light to exit from the first cemented lens to improve the illumination of the system, and can balance the aberration and improve the resolving power. The light emitted by the sixth lens enters the second cemented lens formed by the seventh lens and the eighth lens. The convex design of the first side surface of the seventh lens is conducive to collecting the light emitted by the first cemented lens, and the light incident at the first side surface of the seventh lens does not deflect obviously, which reduces the sensitivity of the second cemented lens. The light emitted by the eighth lens enters the ninth lens.On this basis, by simultaneously controlling the total effective focal length F of the optical lens, the effective focal length F56 of the first cemented lens, the effective focal length F78 of the second cemented lens, and the effective focal length F9 of the ninth lens to meet the requirement of 0.15 ≤ F × (1 / F56 + 1 / F78 + 1 / F9) ≤ 0.65, light within the lens transitions more smoothly to the image plane after passing through the first, second, and ninth lenses, thereby improving the lens's resolution in both the infrared and visible light bands. Furthermore, by controlling the ratio of the total optical length (TTL) of the optical lens to the total effective focal length F to meet the requirement of 5.7 ≤ TTL / F ≤ 8, the lens achieves a balance between miniaturization and high image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0041] Figure 1 1 shows a schematic structural diagram of an optical lens according to Example 1 of the present application;

[0042] Figure 2 The figure shows the modulation transfer function (MTF) curve of the optical lens according to Example 1 of the present application in the visible light band.

[0043] Figure 3 shows a modulation transfer function curve of the optical lens according to Example 1 of the present application in the infrared light band;

[0044] Figure 4 1 shows a schematic structural diagram of an optical lens according to Example 2 of the present application;

[0045] Figure 5 shows a modulation transfer function curve of the optical lens according to Example 2 of the present application in the visible light band;

[0046] Figure 6 shows a modulation transfer function curve of the optical lens according to Example 2 of the present application in the infrared light band;

[0047] Figure 7 1 shows a schematic structural diagram of an optical lens according to Example 3 of the present application;

[0048] Figure 8 shows a modulation transfer function curve of the optical lens according to Example 3 of the present application in the visible light band;

[0049] Figure 9A modulation transfer function curve of the optical lens according to Embodiment 3 of the present application in an infrared light waveband is shown;

[0050] Figure 10 A structural schematic diagram of the optical lens according to Embodiment 4 of the present application is shown;

[0051] Figure 11 A modulation transfer function curve of the optical lens according to Embodiment 4 of the present application in a visible light waveband is shown;

[0052] Figure 12 A modulation transfer function curve of the optical lens according to Embodiment 4 of the present application in an infrared light waveband is shown;

[0053] Figure 13 A structural schematic diagram of the optical lens according to Embodiment 5 of the present application is shown;

[0054] Figure 14 A modulation transfer function curve of the optical lens according to Embodiment 5 of the present application in a visible light waveband is shown;

[0055] Figure 15 A modulation transfer function curve of the optical lens according to Embodiment 5 of the present application in an infrared light waveband is shown;

[0056] Figure 16 A structural schematic diagram of the optical lens according to Embodiment 6 of the present application is shown;

[0057] Figure 17 A structural schematic diagram of the optical lens according to Embodiment 7 of the present application is shown;

[0058] Figure 18 A structural schematic diagram of the optical lens according to Embodiment 8 of the present application is shown;

[0059] Figure 19 A structural schematic diagram of the optical lens according to Embodiment 9 of the present application is shown;

[0060] Figure 20 A structural schematic diagram of the optical lens according to Embodiment 10 of the present application is shown;

[0061] Figure 21 A structural schematic diagram of the optical lens according to Embodiment 11 of the present application is shown;

[0062] Figure 22 A structural schematic diagram of the optical lens according to Embodiment 12 of the present application is shown;

[0063] Figure 23 A structural schematic diagram of the optical lens according to Embodiment 13 of the present application is shown;

[0064] Figure 24 A structural diagram of an optical lens according to Embodiment 14 of the present application is shown;

[0065] Figure 25 A structural diagram of an optical lens according to Embodiment 15 of the present application is shown;

[0066] Figure 26 A structural diagram of an optical lens according to Embodiment 16 of the present application is shown;

[0067] Figure 27 A structural diagram of an optical lens according to Embodiment 17 of the present application is shown;

[0068] Figure 28 A structural diagram of an optical lens according to Embodiment 18 of the present application is shown;

[0069] Figure 29 A structural diagram of an optical lens according to Embodiment 19 of the present application is shown;

[0070] Figure 30 A structural diagram of an optical lens according to Embodiment 20 of the present application is shown;

[0071] Figure 31 A structural diagram of an optical lens according to Embodiment 21 of the present application is shown;

[0072] Figure 32 A structural diagram of an optical lens according to Embodiment 22 of the present application is shown;

[0073] Figure 33 A structural diagram of an optical lens according to Embodiment 23 of the present application is shown;

[0074] Figure 34 A structural diagram of an optical lens according to Embodiment 24 of the present application is shown;

[0075] Figure 35 A structural diagram of an optical lens according to Embodiment 25 of the present application is shown;

[0076] Figure 36 A structural diagram of an optical lens according to Embodiment 26 of the present application is shown;

[0077] Figure 37 A structural diagram of an optical lens according to Embodiment 27 of the present application is shown;

[0078] Figure 38 A structural diagram of an optical lens according to Embodiment 28 of the present application is shown;

[0079] Figure 39A structural diagram of an optical lens according to Embodiment 29 of the present application is shown.

[0080] Figure 40 A structural diagram of an optical lens according to Embodiment 30 of the present application is shown.

[0081] Figure 41 A structural diagram of an optical lens according to Embodiment 31 of the present application is shown.

[0082] Figure 42 A structural diagram of an optical lens according to Embodiment 32 of the present application is shown.

[0083] Figure 43 A structural diagram of an optical lens according to Embodiment 33 of the present application is shown.

[0084] Figure 1 A structural diagram of an optical lens according to Embodiment 34 of the present application is shown. DETAILED DESCRIPTION

[0085] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be noted that these detailed description are merely descriptive of illustrative embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements.

[0086] It should be noted that, in the present specification, the terms first, second, third, etc. are used merely to distinguish one feature from another feature, and do not represent any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0087] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0088] In the present specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is referred to as the first side surface of the lens, and the surface of each lens closest to the second side is referred to as the second side surface of the lens.

[0089] It should also be understood that the use of the term "including", "including" and / or "having" when used in this specification intends to convey the inclusion of the stated features, elements and / or components but does not preclude the presence or addition of one or more other features, elements, components and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0090] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0091] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0092] The features, principles and other aspects of the present application are described in detail below.

[0093] The optical lens according to the exemplary embodiments of the present application can include, for example, nine lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens, which are arranged in order from a first side to a second side along an optical axis.

[0094] In the exemplary embodiments, the optical lens provided by the present application can be used as a light receiving lens or a light emitting lens. The light receiving lens is generally used to collect light from the object side space, and the collected light is used to form detection information, including but not limited to imaging, laser point cloud, etc. The light emitting lens is generally used to transmit light from a light emitting unit to the object side space. According to the role of the light, the light transmitted to the object side space can be divided into projection light for forming a projection image or detection light for detecting target object information, etc.

[0095] It can be understood that when the optical lens provided in the present application is used in a light receiving lens such as a camera lens, a laser radar receiving end lens, a microscope lens or a telescope lens, the "first side" referred to herein can refer to an object side, and the "second side" can refer to an image side (such as a side where a photosensor or a retina is located), that is, light from the object side can be imaged on the image side via the optical lens, wherein the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera or the like. When the optical lens provided in the present application is used in a light emitting lens such as a projection lens or a laser radar transmitting end lens, the "first side" referred to herein can refer to an object side, and the "second side" can refer to a light source side, that is, light from the light source side can be projected on the object side via the optical lens.

[0096] In an example embodiment, the first lens has a negative focal power, the first side surface is convex, and the second side surface is concave. The negative focal power of the first lens, in combination with the convex design of the first side surface, can achieve the collection of light rays of a large angle while controlling the size of the lens aperture, increase the amount of light entering the system, and improve the illumination. In addition, the convex design of the first side surface can also facilitate the handling of the problem of dust accumulation on the lens surface. The concave design of the second side surface can not only reduce the volume of the first lens to a greater extent while meeting the assembly requirements, thereby reducing the cost, but also facilitate the smooth transition of light, and to some extent, improve the resolution. In addition, the first lens can be made of a high refractive index material to facilitate the convergence of light at the front end of the lens and reduce the aperture at the front end of the lens.

[0097] In an example embodiment, the second lens can have a negative focal power, the first side surface can be, for example, concave, and the second side surface can be, for example, convex. By designing the second lens to have a negative focal power, the second lens can smoothly transition the light emitted by the first lens. The concave design of the first side surface facilitates the gentle acceptance of the light emitted by the first lens, reduces the loss of light energy, improves the illumination, and reduces the sensitivity of the system with a smaller deflection. The convex design of the second side surface can make the light emitted by the second lens have a smaller exit angle, thereby reducing the optical path difference between fields of view and reducing the defocus between different fields of view, and improving the imaging quality.

[0098] In an example embodiment, the second lens can have a negative focal power, the first side surface can be, for example, concave, and the second side surface can be, for example, concave. By designing the second lens to have a negative focal power, the second lens can smoothly transition the light emitted by the first lens. The concave design of the first side surface and the second side surface facilitates the correction of aberrations of edge light and central light, and achieves high resolution.

[0099] In the example embodiment, the second lens can have positive focal power, and the first side thereof can be concave, and the second side thereof can be convex. The concave design of the first side of the second lens can cooperate with the concave design of the second side of the first lens to facilitate smooth reception of the light rays emitted by the first lens by the second lens, and reduce light energy loss. The convex design of the second side of the second lens can make the light rays emitted by the second lens have a smaller exit angle, thereby reducing the optical path difference between the fields of view, reducing the defocus between the fields of view, and improving the imaging quality. The positive focal power design of the second lens, in combination with the meniscus design formed by the first side and the second side, can effectively reduce the divergence of the light rays in the front part of the lens, thereby facilitating the reduction of the front aperture of the system.

[0100] In the example embodiment, the third lens can have positive focal power, and the first side thereof can be convex, and the second side thereof can be concave. The positive focal power design of the third lens can compress the light rays diverging from the front via the first lens and the second lens, thereby compressing the aperture of the lens. The first side being convex can facilitate the reception of the light rays transmitted by the second lens by the third lens, and the first side can simultaneously deflect and converge the light rays, reduce the height of the light rays, and thereby reduce the volume of the third lens and reduce the cost. The second side being concave can make the second side smoothly transition the light rays, and the first side being convex can reduce the divergence effect of the light rays by the second side in the case that the focal power of the third lens is positive, thereby facilitating the reduction of the height of the light rays and realizing the miniaturization of the lens.

[0101] In the example embodiment, the third lens can have positive focal power, and the first side thereof can be convex, and the second side thereof can be convex. The biconvex design of the third lens can make the third lens have positive focal power, and the light rays emitted by the second lens can be deflected twice and converged when passing through the first side and the second side of the third lens, thereby reducing the height of the light rays, facilitating the miniaturization of the lens, and reducing the cost of the lens. In addition, the third lens can be made of a high refractive index material to increase the collection ability of the third lens for the light rays, thereby reducing the convergence pressure of the light rays on the lenses behind the third lens, facilitating the improvement of the resolution of the lens, and reducing the sensitivity of the lenses behind the third lens.

[0102] In the example embodiment, the third lens can have negative focal power, and the first side thereof can be convex, and the second side thereof can be concave. The first side being convex can facilitate the reception and deflection of the light rays emitted by the second lens, thereby reducing the height of the light rays, and thereby reducing the volume of the third lens and reducing the cost. By designing the second side to be concave, the third lens can have negative focal power, which can reduce the compression amount of the light rays by the third lens, thereby reducing the sensitivity of the third lens and improving the yield of the entire system.

[0103] In the example embodiment, the fourth lens has positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The first side surface is designed to be convex, so as to effectively converge the light rays in front of the first side surface, so that the divergent light rays can smoothly pass through the fourth lens into the optical system behind, thereby reducing the back aperture. The second side surface is designed to be convex, so as to gently transition the light rays passed by the front group, thereby reducing the generation of aberration and improving the image quality. The biconvex design of the fourth lens makes the focal power of the fourth lens positive, thereby making the fourth lens have a great effect on chromatic aberration correction and thermal compensation, and being conducive to improving the imaging effect of the lens in the infrared light waveband and the visible light waveband at the same time. If the fourth lens has a specific material coefficient, the effect can be further improved.

[0104] In the example embodiment, the fourth lens has positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The positive focal power design of the fourth lens makes the fourth lens have a good effect on chromatic aberration correction and thermal compensation, and being conducive to improving the imaging effect of the lens in the infrared light waveband and the visible light waveband at the same time. If the fourth lens has a specific material coefficient, the effect can be further improved. The first side surface is designed to be convex, so as to effectively converge the light rays in front of the first side surface, so that the divergent light rays can smoothly pass through the fourth lens into the optical system behind, thereby reducing the back aperture. The second side surface is designed to be concave, which is conducive to light divergence. When the diaphragm is arranged between the fourth lens and the fifth lens, the diaphragm aperture can be enlarged, and the illumination can be improved.

[0105] In the example embodiment, the fourth lens has positive focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The positive focal power design of the fourth lens makes the fourth lens have a good effect on chromatic aberration correction and thermal compensation, and being conducive to improving the imaging effect of the lens in the infrared light waveband and the visible light waveband at the same time. If the fourth lens has a specific material coefficient, the effect can be further improved. The concave design of the first side surface makes the first side surface be able to receive more light rays emitted by the first lens, the second lens and the third lens, thereby improving the illumination. The convex design of the second side surface can share a part of the thermal compensation pressure of the whole system, and the converging effect of the second side surface on the light rays is conducive to improving the chromatic aberration and improving the resolution.

[0106] In the exemplary embodiments, the fifth lens and the sixth lens are cemented to form a first cemented lens, and the fifth lens and the sixth lens have opposite positive and negative optical powers, so that not only the light rays can be smoothly transferred to the rear lens, but also at least the following effects can be achieved: the air gap between the fifth lens and the sixth lens is reduced by cementing, and then the total length of the system is reduced; the chromatic aberration is reduced and the imaging quality is improved by complementary dispersion of the fifth lens and the sixth lens; the assembly components between the fifth lens and the sixth lens are reduced by cementing, the assembly process is reduced, and the cost is reduced; the field curvature can be further reduced, and the off-axis aberration of the system can be corrected; the focal length of the system can be reasonably distributed, which is helpful to realize thermal compensation, and then good temperature performance is obtained.

[0107] In the exemplary embodiments, the first cemented lens has a positive optical power.

[0108] In the exemplary embodiments, the fifth lens can have a positive optical power, and the first side surface is a convex surface, and the second side surface can be, for example, a convex surface. By designing the first side surface and the second side surface as convex surfaces at the same time, the optical power of the fifth lens is positive, which can effectively compress the rear group light rays and reduce the light ray height of the rear group system, which is helpful to realize small aperture design. At the same time, the convex design of the first side surface of the fifth lens is also helpful to reduce the system aberration and improve the resolving power.

[0109] In the exemplary embodiments, the fifth lens can have a positive optical power, and the first side surface is a convex surface, and the second side surface can be, for example, a concave surface. The positive optical power design of the fifth lens makes it able to more gently compress the light rays emitted by the fourth lens. The convex design of the first side surface of the fifth lens is helpful to reduce the system aberration and improve the resolving power. The design of the second side surface as a concave surface is helpful to transition light rays and reduce chromatic aberration, which is helpful to realize achromatic function and improve resolution.

[0110] In the exemplary embodiments, the fifth lens can have a negative optical power, and the first side surface is a convex surface, and the second side surface can be, for example, a concave surface. The negative optical power design of the fifth lens makes it able to moderately diverge the light rays compressed by the fourth lens in front, and smoothly the overall trend and height of the light rays, and then reduce the sensitivity of the fifth lens. The convex design of the first side surface of the fifth lens is helpful to reduce the system aberration and improve the resolving power. The design of the second side surface as a concave surface is helpful to transition light rays and reduce chromatic aberration, which is helpful to realize achromatic function and improve resolution.

[0111] In the example embodiment, the sixth lens can have a negative focal power, and the first side surface thereof can be, for example, a concave surface, and the second side surface thereof is a concave surface. The sixth lens with the negative focal power, in combination with the fifth lens in front thereof with the opposite positive or negative focal power, can effectively correct chromatic aberration and achieve good imaging effect in the infrared and visible light ranges. The concave design of the first side surface of the sixth lens forms a compact cemented structure with the second side surface of the fifth lens, reduces the axial length of the system, and corrects aberration. The concave design of the second side surface of the sixth lens can diverge light and raise the height of the light, thereby expanding the image surface, balancing aberration, and improving resolving power.

[0112] In the example embodiment, the sixth lens can have a negative focal power, and the first side surface thereof can be, for example, a concave surface, and the second side surface thereof is a concave surface. The sixth lens with the negative focal power, in combination with the fifth lens in front thereof with the opposite positive or negative focal power, can effectively correct chromatic aberration and achieve good imaging effect in the infrared and visible light ranges. The concave design of the first side surface of the sixth lens forms a compact cemented structure with the second side surface of the fifth lens, reduces the axial length of the system, and corrects aberration. The concave design of the second side surface of the sixth lens can diverge light and raise the height of the light, thereby expanding the image surface, balancing aberration, and improving resolving power.

[0113] In the example embodiment, the sixth lens can have a negative focal power, and the first side surface thereof can be, for example, a concave surface, and the second side surface thereof is a concave surface. The sixth lens with the negative focal power, in combination with the fifth lens in front thereof with the opposite positive or negative focal power, can effectively correct chromatic aberration and achieve good imaging effect in the infrared and visible light ranges. The concave design of the first side surface of the sixth lens forms a compact cemented structure with the second side surface of the fifth lens, reduces the axial length of the system, and corrects aberration. The concave design of the second side surface of the sixth lens can diverge light and raise the height of the light, thereby expanding the image surface, balancing aberration, and improving resolving power.

[0114] In the example embodiment, the seventh lens and the eighth lens are cemented to form a second cemented lens, and the seventh lens and the eighth lens have opposite positive or negative focal powers, thereby not only smoothly transitioning light to the rear lenses, but also at least achieving the following effects: reducing the air gap between the seventh lens and the eighth lens through cementing, thereby reducing the total length of the system; the dispersion of the seventh lens and the eighth lens can be complementary, which is conducive to reducing chromatic aberration and improving imaging quality; reducing the assembly components between the seventh lens and the eighth lens through cementing, reducing the assembly process, and reducing costs; further reducing field curvature and correcting off-axis point aberration of the system; reasonably distributing the focal length of the system, which is conducive to achieving thermal compensation and thereby obtaining good temperature performance.

[0115] In an example embodiment, the second cemented lens has positive power.

[0116] In an example embodiment, the seventh lens can have positive power, with its first side surface being convex and its second side surface being convex, for example. The seventh lens with positive power can gently converge the light rays emitted by the fifth and sixth lenses as a whole, thereby reducing the sensitivity of the seventh lens. The convex design of the first side surface allows it to better collect the light rays emitted by the first cemented lens in front, so that the light rays do not experience significant deflection when entering the seventh lens, thereby reducing the sensitivity of the second cemented lens. The convex design of the second side surface allows it to compress the light rays, thereby reducing the height of the light rays in the rear system and helping to reduce the aperture.

[0117] In an example embodiment, the seventh lens can have negative power, with its first side surface being convex and its second side surface being concave, for example. The seventh lens with negative power can moderately diverge the light rays emitted by the fifth and sixth lenses as a whole, thereby balancing the height of the light rays behind the seventh lens. The convex design of the first side surface allows it to better collect the light rays emitted by the first cemented lens in front, so that the light rays do not experience significant deflection when entering the seventh lens, thereby reducing the sensitivity of the second cemented lens. The concave design of the second side surface allows the light rays to enter the eighth lens more smoothly, thereby reducing the loss of light energy and effectively improving the illumination and resolving power of the system.

[0118] In an example embodiment, the eighth lens can have negative power, with its first side surface being concave and its second side surface being convex, for example. The eighth lens with negative power, when cemented with the seventh lens, can make the system more compact, thereby reducing the overall length of the lens. The cemented connection between the eighth lens and the seventh lens can also reduce the use of assembly components, thereby making the assembly of the lens more convenient. Furthermore, it can also improve aberration and enhance resolution. The concave design of the first side surface allows it to better receive the light rays emitted by the seventh lens and diverge the received light rays, thereby expanding the imaging surface and balancing the aberration. The convex design of the second side surface allows it to converge the light rays, thereby reducing the effective aperture of the ninth lens, which in turn reduces the cost and processing difficulty of the molded lens.

[0119] In the example embodiment, the eighth lens can have a negative refractive power, the first side surface of which is concave, and the second side surface of which can be concave, for example. The eighth lens with a negative refractive power can make the system more compact after being cemented with the seventh lens, thereby reducing the total length of the lens. The eighth lens is connected with the seventh lens in a cemented manner, which can also reduce the use of connecting elements, thereby making the lens assembly more convenient. Further, by making the seventh lens and the eighth lens have opposite positive and negative properties, the aberration can be improved and the resolution can be improved. The first side surface is concave, which can better receive the light emitted by the seventh lens and diverge the received light, thereby expanding the imaging surface and balancing the aberration. The second side surface is concave, which can expand the height of the effective light, so that more light can enter the ninth lens, improve the correction ability of the aspheric surface of the ninth lens, and finally improve the resolution.

[0120] In the example embodiment, the eighth lens can have a positive refractive power, the first side surface of which is convex, and the second side surface of which can be convex, for example. The eighth lens with a positive refractive power can make the system more compact after being cemented with the seventh lens, thereby reducing the total length of the lens. The eighth lens is connected with the seventh lens in a cemented manner, which can also reduce the use of connecting elements, thereby making the lens assembly more convenient. Further, by making the seventh lens and the eighth lens have opposite positive and negative properties, the aberration can be improved and the resolution can be improved. The convex design of the first side surface and the second side surface makes the eighth lens can share the resolution pressure of the entire system, thereby improving the thermal compensation effect.

[0121] In the example embodiment, the eighth lens can have a positive refractive power, the first side surface of which is convex, and the second side surface of which can be concave, for example. The eighth lens with a positive refractive power can make the system more compact after being cemented with the seventh lens, thereby reducing the total length of the lens. The eighth lens is connected with the seventh lens in a cemented manner, which can also reduce the use of connecting elements, thereby making the lens assembly more convenient. Further, by making the seventh lens and the eighth lens have opposite positive and negative properties, the aberration can be improved and the resolution can be improved. The first side surface is convex, which is used to cement the seventh lens. The second side surface is concave, which can expand the height of the effective light, so that more light can enter the ninth lens, improve the correction ability of the aspheric surface of the ninth lens, and finally improve the resolution.

[0122] In an exemplary embodiment, the ninth lens can have a negative power, and its first side surface can be convex, and its second side surface can be concave. The ninth lens with a negative power can gently flatten the light path of the second cemented lens with a positive power. The first side surface designed as convex can effectively correct the optical path difference between fields of view, help to balance aberrations and reduce the light path of the edge field of view, thereby reducing the chief ray angle (CRA) and improving the imaging quality. The second side surface designed as concave can diverge the light and expand the image surface, while also balancing aberrations and improving resolution.

[0123] In an exemplary embodiment, the ninth lens can have a positive power, and its first side surface can be convex, and its second side surface can be concave. The ninth lens with a positive power can converge the light, reduce the height of the light, and thereby facilitate the reduction of the back focal length and the miniaturization goal. The first side surface designed as convex can reduce the light path, reduce the loss of light of each field of view, and improve the illumination of each field of view. The second side surface designed as concave is beneficial to expand the image surface, balance aberrations, and improve resolution.

[0124] In an exemplary embodiment, the ninth lens can have a negative power, and its first side surface can be concave, and its second side surface can be concave. The negative power design of the ninth lens, combined with the concave design of the first side surface, allows the first side surface to smoothly collect the light emitted from the eighth lens. The concave design of the second side surface can further flatten the light path of the second cemented lens. In addition, the flexible aspheric surface property of the first side surface and / or the second side surface is beneficial to balance the system aberrations (such as astigmatism, field curvature, coma, etc.) and improve resolution.

[0125] In an exemplary embodiment, the ninth lens can have a negative power, and its first side surface can be concave, and its second side surface can be convex. The negative power design of the ninth lens, combined with the concave design of the first side surface, allows the first side surface to smoothly collect the light emitted from the eighth lens. The convex design of the second side surface can reduce the height of the light emitted and reduce the CRA. In addition, the flexible aspheric surface property of the first side surface and / or the second side surface is beneficial to balance the system aberrations (such as astigmatism, field curvature, coma, etc.) and improve resolution.

[0126] In an exemplary embodiment, the ninth lens can have a positive power, and its first side surface can be concave, and its second side surface can be convex. The first side surface and / or the second side surface are preferably aspheric. At this time, the ninth lens with a positive power and a shape of a crescent moon can correct and balance the aberrations caused by the front end by using the change in the radius of curvature of the aspheric surface, thereby improving the resolution of the optical system.

[0127] In the example embodiment, the optical lens can further comprise a diaphragm, which can be arranged between the fourth lens and the fifth lens, for example. By arranging the diaphragm between the fourth lens and the fifth lens, the light rays entering the optical system can be effectively collected, the lens aperture at the rear end of the optical system can be reduced, and the assembly sensitivity of the system can be reduced. It should be understood that the arrangement of the diaphragm between the fourth lens and the fifth lens is only exemplary, and the present application does not make a specific limitation thereon, and the diaphragm can also be arranged at other positions according to actual needs.

[0128] In the example embodiment, the first side surface of the ninth lens and the second side surface of the ninth lens have at least one inflection point. By such an arrangement, aberration can be further balanced, and resolution can be improved.

[0129] In the example embodiment, the ninth lens can have one or two aspheric surfaces. Such an arrangement is beneficial for correcting field curvature and improving resolution.

[0130] In the example embodiment, the optical lens can further comprise a filter between the ninth lens and the image plane, so as to filter light rays with different wavelengths. The optical lens can further comprise a protective glass between the filter and the image plane according to actual needs, so as to prevent the internal elements (e.g., a chip) of the optical lens from being damaged.

[0131] In the example embodiment, the optical lens can further comprise a photosensitive element arranged on the second side. Optionally, the photosensitive element arranged on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0132] In the example embodiment, the center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, the center thickness d13 of the seventh lens, the center thickness d14 of the eighth lens, and the total optical length TTL of the optical lens satisfy: 0.23≤(d10+d11+d13+d14) / TTL≤0.42. Preferably, 0.265≤(d10+d11+d13+d14) / TTL≤0.38. Further, 0.2800≤(d10+d11+d13+d14) / TTL≤0.3445. By controlling the condition, the ratio of the sum of the center thicknesses of the first cemented lens and the second cemented lens to the total optical length can be reasonably set, which is beneficial for improving the relative luminance. In addition, the two cemented lenses (the first cemented lens and the second cemented lens) are continuously distributed in the rear half of the optical system, which is helpful for improving the resolution.

[0133] In exemplary embodiments, the center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, and the total optical length TTL of the optical lens satisfy: 0.1≤(d10+d11) / TTL≤0.175. Preferably, 0.115≤(d10+d11) / TTL≤0.16. Further, 0.1272≤(d10+d11) / TTL≤0.1489. By controlling this conditional expression, the center thickness of the first cemented lens can be appropriately increased within a certain range while satisfying a smaller total optical length of the optical lens, thereby enhancing the light regulation capability of the first cemented lens, so that after the light converges at the fourth lens and exits to the first cemented lens, a smooth transition can be obtained in the first cemented lens, while improving the imaging quality of the lens in the infrared waveband and the visible light waveband.

[0134] In exemplary embodiments, the center thickness d13 of the seventh lens, the center thickness d14 of the eighth lens, and the total optical length TTL of the optical lens satisfy: 0.115≤(d13+d14) / TTL≤0.25. Preferably, 0.13≤(d13+d14) / TTL≤0.22. Further, 0.1500≤(d13+d14) / TTL≤0.1957. By controlling this conditional expression, the center thickness of the second cemented lens can be appropriately increased within a certain range while satisfying a smaller total optical length of the optical lens, so that the light can pass through a longer distance with a sustained trend of smooth compression, leaving more space for balancing aberrations, thereby improving the imaging quality of the lens in the visible light waveband and the infrared waveband.

[0135] In exemplary embodiments, the sum d(L2~L8) of the center thicknesses of all air gaps between the second lens and the eighth lens, and the total optical length TTL of the optical lens satisfy: 0.03≤d(L2~L8) / TTL≤0.095. Preferably, 0.04≤d(L2~L8) / TTL≤0.085. Further, 0.0496≤d(L2~L8) / TTL≤0.0800. By controlling this conditional expression, the center thicknesses of the air gaps between the second lens and the third lens, the third lens and the fourth lens, the fourth lens and the fifth lens, the sixth lens and the seventh lens, and the eighth lens and the ninth lens can be controlled, so that the sum of the center thicknesses of all air gaps accounts for a small proportion in the total optical length, which is conducive to the miniaturization of the lens in the axial direction while meeting the assembly requirements.

[0136] In the exemplary embodiments, the center distance d56 between the second side surface of the fifth lens and the first side surface of the sixth lens and the total optical length TTL of the optical lens satisfy: 0 < d56 / TTL ≤ 0.02. Preferably, 0 < d56 / TTL ≤ 0.01. By controlling the conditional formula, the thickness of the glue layer between the fifth lens and the sixth lens can be controlled. The thinner the glue layer, the lower the light sensitivity of the first cemented lens, which is conducive to the correction of aberration, especially chromatic aberration, and also improves the resolution. The thinner glue layer is also conducive to the miniaturization of the lens. For example, d56 can be 0.008 mm or 0.01 mm.

[0137] In the exemplary embodiments, the total effective focal length F of the optical lens and the total optical length TTL of the optical lens satisfy: 5.7 ≤ TTL / F ≤ 8. Preferably, 6.2 ≤ TTL / F ≤ 7.5. Further, 6.6135 ≤ TTL / F ≤ 7.0335. By controlling the conditional formula, the ratio between the total optical length and the total effective focal length of the optical lens can be controlled, which is conducive to the realization of the miniaturization and high imaging quality of the lens.

[0138] In the exemplary embodiments, the first side surface curvature radius R9 of the fifth lens, the first side surface curvature radius R13 of the seventh lens, and the second side surface curvature radius R12 of the sixth lens satisfy: 0.65 ≤ (R9 x R13) / (R12 x R12) ≤ 1.35. Preferably, 0.7 ≤ (R9 x R13) / (R12 x R12) ≤ 1.25. Further, 0.7500 ≤ (R9 x R13) / (R12 x R12) ≤ 1.1481. By controlling the conditional formula, the first cemented lens object side surface curvature radius, the first cemented lens image side surface curvature radius, and the second cemented lens object side surface curvature radius can be reasonably set, so that the three curvature radii are similar, and then the incidence angle and the exit angle of the light at the first cemented lens are similar and the overall sensitivity of the system is reduced, which is conducive to the overall smooth passing of the light through the first cemented lens and the second cemented lens and to the transmission to the image plane, while improving the imaging quality of the lens in the visible light band and the infrared band, allowing the lens to be day and night focus.

[0139] In the exemplary embodiments, the first side surface curvature radius R1 of the first lens and the maximum field of view FOV of the optical lens satisfy: 0.28 ≤ R1 / FOV ≤ 0.6. Preferably, 0.3 ≤ R1 / FOV ≤ 0.55. Further, 0.3486 ≤ R1 / FOV ≤ 0.5000. By controlling the conditional formula, the curvature radius of the first side surface of the first lens can be reasonably controlled, so that the front end of the lens meets the small aperture while collecting more angles of light, improving the illumination.

[0140] In an exemplary embodiment, the total effective focal length F of the optical lens and the full image height H of the optical lens satisfy: 0.6≤F / H≤0.8. Preferably, 0.65≤F / H≤0.75. Further, 0.6910≤F / H≤0.7195. By controlling the conditional expression, the ratio between the total effective focal length and the full image height of the optical lens can be reasonably controlled within a certain range, which is conducive to the improvement of resolution.

[0141] In an exemplary embodiment, the total optical length TTL of the optical lens, the radian value θ of the maximum field angle of the optical lens, and the full image height H of the optical lens satisfy: 2.8≤TTL / H / θ≤4. Preferably, 3.25≤TTL / H / θ≤3.6. Further, 3.3868≤TTL / H / θ≤3.4843. By controlling the conditional expression, the total optical length, the maximum field angle of the optical lens, and the full image height of the optical lens can be controlled, which is conducive to the realization of large field angle and axial miniaturization of the lens at the same time.

[0142] In an exemplary embodiment, the total effective focal length F of the optical lens, the radian value θ of the maximum field angle of the optical lens, and the full aperture D of the optical lens satisfy: 0.57≤(F×θ) / D≤0.8. Preferably, 0.65≤(F×θ) / D≤0.72. Further, 0.6763≤(F×θ) / D≤0.7050. By controlling the conditional expression, the total effective focal length, the maximum field angle, and the front aperture of the optical lens can be controlled, which is conducive to balancing the size of the front aperture and the field angle, so that the lens can simultaneously consider small volume and high imaging quality.

[0143] In an exemplary embodiment, the total effective focal length F of the optical lens and the curvature radius R1 of the first side of the first lens satisfy: 3.5≤R1 / F≤7.2. Preferably, 3.8≤R1 / F≤6.85. Further, 4.2069≤R1 / F≤6.2567. By controlling the conditional expression, the ratio between the curvature radius of the first side of the first lens and the total effective focal length of the optical lens can be controlled to effectively adjust the light ray trend at the rear end of the lens, balance aberration, and improve resolution.

[0144] In exemplary embodiments, the first side surface radius of curvature R5 of the third lens, the second side surface radius of curvature R6 of the third lens, and the central thickness d5 of the third lens satisfy: -50≤R5 / (R6+d5)≤1.5. Preferably, -35≤R5 / (R6+d5)≤1.2. Further, -30.7374≤R5 / (R6+d5)≤1.0305. By controlling this conditional expression, the radius of curvature of both sides of the third lens and the central thickness can be controlled, so that the third lens has a special shape (close to a concentric circle), and then there is an optical path difference between the peripheral light and the central light of the third lens, achieving the purposes of reducing the front aperture of the lens, reducing the volume of the lens, and reducing the cost of the lens.

[0145] In exemplary embodiments, the second side surface sagitta SAG6 of the third lens and the first side surface sagitta SAG7 of the fourth lens satisfy: 0.2≤|SAG6 / SAG7|≤5.5. Preferably, 0.24≤|SAG6 / SAG7|≤4.25. Further, 0.2795≤|SAG6 / SAG7|≤3.6783. By controlling this conditional expression, the sagitta of the second side surface of the third lens and the first side surface of the fourth lens can be controlled, so that the sagitta of both side surfaces is close, which is conducive to the smooth transition of light between the third lens and the fourth lens, and reduces the sensitivity.

[0146] In exemplary embodiments, the effective focal length F56 of the first cemented lens and the total effective focal length F of the optical lens satisfy: 3.5≤F56 / F≤13.5. Preferably, 4≤F56 / F≤12. Further, 4.8446≤F56 / F≤10.8963. By controlling this conditional expression, the effective focal length of the first cemented lens can be positive and have a relatively large value, which then smoothly transitions and compresses the light emitted by the fourth lens in front, so that the light is deflected inward, which is conducive to compressing the rear aperture of the lens, while also effectively correcting chromatic aberration, achieving the confocal effect of the lens in the infrared and visible light wavebands, so that the lens can meet the high resolution and double-pass effects.

[0147] In exemplary embodiments, the effective focal length F78 of the second cemented lens and the total effective focal length F of the optical lens satisfy: 1.0≤F78 / F≤5.5. Preferably, 1.15≤F78 / F≤4.5. Further, 1.3049≤F78 / F≤3.9664. By controlling this conditional expression, the focal length of the second cemented lens can be maintained at a relatively low value, which is conducive to the transition of light emitted by the first cemented lens in front, thereby reducing the system sensitivity.

[0148] In the example embodiment, the total effective focal length F of the optical lens, the radian value θ of the maximum field angle of the optical lens, and the total image height H of the optical lens satisfy: 0.7≤(H / 2) / (F*tan(θ / 2))≤0.9. Preferably, 0.8≤(H / 2) / (F*tan(θ / 2))≤0.88. Further, 0.8258≤(H / 2) / (F*tan(θ / 2))≤0.8623. By controlling the conditional formula, the total effective focal length, the maximum field angle, and the total image height of the optical lens can be controlled to achieve high resolution of the lens.

[0149] In the example embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -2.4≤F1 / F≤-1.35. Preferably, -2.2≤F1 / F≤-1.5. Further, -2.0625≤F1 / F≤-1.6552. By controlling the conditional formula, the effective focal length of the first lens can be maintained at a lower value, which is conducive to collecting large field light rays, and the light rays can enter the rear optical system well after being diverged by the first lens, thereby increasing the light flux.

[0150] In the example embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1.7≤F4 / F≤6.8. Preferably, 1.85≤F4 / F≤5.8. Further, 2.0226≤F4 / F≤5.0697. By controlling the conditional formula, the effective focal length of the fourth lens can be positive and small in value, which is conducive to effectively compressing the light rays at the fourth lens, so that the light rays converge and deflect inward, which is conducive to the light rays reaching the image plane faster and compressing the aperture, thereby achieving miniaturization of the lens. Further, the fourth lens can be matched with its own material coefficient to greatly affect chromatic aberration correction and thermal compensation, which is conducive to achieving good imaging effect in the infrared and visible light bands.

[0151] In the example embodiment, the effective focal length F4 of the fourth lens and the relative refractive index temperature coefficient dn / dt(4) of the fourth lens under the temperature condition of 20°C-95°C satisfy: -15≤F4 / (dn / dt(4))≤-2.5. Preferably, -12≤F4 / (dn / dt(4))≤-3.2. Further, -10.5716≤F4 / (dn / dt(4))≤-4.3336. By controlling the conditional formula, the effective focal length of the fourth lens can be positive, and the special material coefficient (negative relative refractive index temperature coefficient) of the fourth lens can achieve better temperature compensation effect when the temperature changes, thereby achieving temperature stability and high resolution.

[0152] In the example embodiments, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: 3≤|F2 / F|. Preferably, 3.5≤|F2 / F|≤120. Further, 4.5140≤|F2 / F|≤96.5972. By controlling the conditional formula, the effective focal length of the second lens can be maintained at a larger value, and the second lens can play a role in smoothly transitioning the light rays between the first lens and the third lens, thereby reducing the system sensitivity and improving the resolution quality. It should be understood that the greater the absolute value of the effective focal length of the second lens, the smaller the influence of the second lens on the trend of the light rays. For example, the effective focal length of the second lens can be 519, and when the absolute value of the effective focal length of the second lens is greater than 519, especially to infinity, the second lens has little influence on the trend of the light rays, which is conducive to achieving smooth transition of the light rays.

[0153] In the example embodiments, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 3.5≤|F3 / F|. Preferably, 4.5≤|F3 / F|≤400. Further, 5.4539≤|F3 / F|≤333.0243. By controlling the conditional formula, the absolute value of the effective focal length of the third lens can be larger, thereby smoothly receiving the light rays emitted by the second lens and smoothly emitting the light rays to the fourth lens, thereby reducing the system sensitivity. It should be understood that the greater the absolute value of the effective focal length of the third lens, the smaller the influence of the third lens on the trend of the light rays. For example, the effective focal length of the third lens can be -1653, and when the absolute value of the effective focal length of the third lens is greater than 1653, especially to infinity, the third lens has little influence on the trend of the light rays, which is conducive to achieving smooth transition of the light rays.

[0154] In the example embodiments, the total effective focal length F of the optical lens, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, and the effective focal length F4 of the fourth lens satisfy: 0.18≤F×(1 / F2+1 / F3+1 / F4)≤0.42. Preferably, 0.195≤F×(1 / F2+1 / F3+1 / F4)≤0.38. Further, 0.2227≤F×(1 / F2+1 / F3+1 / F4)≤0.3491. By controlling the conditional formula, the total effective focal length of the optical lens, the effective focal length of the second lens, the effective focal length of the third lens, and the effective focal length of the fourth lens can be controlled, which is conducive to the light rays being expanded and then smoothly converged in front of the system to allow the lens to achieve large field of view imaging and reduce sensitivity at a smaller front aperture.

[0155] In exemplary embodiments, the effective focal length F56 of the first cemented lens and the effective focal length F78 of the second cemented lens satisfy: 1.15≤F56 / F78≤12. Preferably, 1.35≤F56 / F78≤9.6. Further, 1.5805≤F56 / F78≤8.3446. By controlling this conditional expression, the ratio between the positive focal length of the first cemented lens and the positive focal length of the second cemented lens can be controlled, so that the light rays in the first cemented lens and the second cemented lens are smoothly compressed. At the same time, the first cemented lens and the second cemented lens can form a symmetrical structure, which is beneficial to reducing field curvature, correcting aberration, and improving resolution, so that the lens has good imaging effect in the infrared waveband and the visible light waveband.

[0156] In exemplary embodiments, the total effective focal length F of the optical lens, the effective focal length F56 of the first cemented lens, the effective focal length F78 of the second cemented lens, and the effective focal length F9 of the ninth lens satisfy: 0.15≤F×(1 / F56+1 / F78+1 / F9)≤0.65. Preferably, 0.2≤F×(1 / F56+1 / F78+1 / F9)≤0.6. Further, 0.2592≤F×(1 / F56+1 / F78+1 / F9)≤0.5524. By controlling this conditional expression, the total effective focal length of the optical lens and the effective focal lengths of the first cemented lens, the second cemented lens, and the ninth lens located at the rear of the system can be controlled, which is beneficial to the smooth transition of light rays to the image plane at the rear of the system, so that the resolving power of the lens in the infrared light waveband and the visible light waveband is improved.

[0157] In exemplary embodiments, the full aperture D of the optical lens, the full image height H of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: 0.85≤D / H / θ≤1.45. Preferably, 1.0≤D / H / θ≤1.2. Further, 1.0180≤D / H / θ≤1.0221. By controlling this conditional expression, the first side aperture size of the first lens, the full image height of the optical lens, and the maximum field angle of the optical lens can be controlled, which is beneficial to miniaturization while maintaining a large field angle.

[0158] In exemplary embodiments, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.55≤F / ENPD≤1.75. Preferably, 1.6≤F / ENPD≤1.68, and F / ENPD can be equal to 1.6 in some embodiments and can be equal to 1.68 in other embodiments. By controlling this conditional expression, the total effective focal length and the entrance pupil diameter of the optical lens can be controlled, so that the lens has a larger aperture and improves the illumination.

[0159] In exemplary embodiments, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: -7.5≤F5 / F6≤-0.5. Preferably, -6≤F5 / F6≤-0.72. Further, -5.2354≤F5 / F6≤-0.8718. By controlling this conditional expression, it can be guaranteed that the fifth lens and the sixth lens in the first cemented lens have opposite signs of refractive power, so that the chromatic aberration is effectively corrected, and the lens can present better imaging quality in the infrared light waveband and the visible light waveband.

[0160] In exemplary embodiments, the effective focal length F7 of the seventh lens and the effective focal length F8 of the eighth lens satisfy: -3≤F7 / F8≤-0.08. Preferably, -2.6≤F7 / F8≤-0.095. Further, -2.2141≤F7 / F8≤-0.1109. By controlling this conditional expression, it can be guaranteed that the seventh lens and the eighth lens in the second cemented lens have opposite signs of refractive power, so that the chromatic aberration is further corrected, and the imaging quality of the lens in the infrared light waveband and the visible light waveband is further improved.

[0161] In exemplary embodiments, the Abbe number Vd7 of the seventh lens and the Abbe number Vd8 of the eighth lens satisfy: 25≤|Vd7-Vd8|≤50. Preferably, 30≤|Vd7-Vd8|≤45. By controlling this conditional expression, a larger dispersion difference between the seventh lens and the eighth lens in the second cemented lens can be obtained, so that the chromatic aberration is corrected, and the imaging quality of the lens in the infrared light waveband and the visible light waveband is improved.

[0162] In exemplary embodiments, the second side surface curvature radius R2 of the first lens and the first side surface curvature radius R3 of the second lens satisfy: -1.4≤R2 / R3≤-0.125. Preferably, -1.2≤R2 / R3≤-0.15. Further, -0.8556≤R2 / R3≤-0.1932. By controlling this conditional expression, the second side surface of the first lens and the first side surface of the second lens can form two continuous concave surfaces, so that the light rays pass through twice and are divergent, which is beneficial to realizing light beam expansion of the lens at a smaller aperture.

[0163] In exemplary embodiments, the central thickness d89 of the air gap between the eighth lens and the ninth lens and the total effective focal length F of the optical lens satisfy: 0.01≤d89 / F≤0.35. Preferably, 0.012≤d89 / F≤0.25. Further, 0.0150≤d89 / F≤0.2063. By controlling this conditional expression, the ratio between the central thickness of the air gap between the eighth lens and the ninth lens and the total effective focal length of the optical lens is small, so that the light rays can enter the ninth lens faster, and the lens can be miniaturized, the CRA can be reduced, and the image quality can be improved.

[0164] In an exemplary embodiment, the effective focal length F1 of the first lens and the first side surface radius of curvature R1 of the first lens satisfy: -0.8≤F1 / R1≤-0.1. Preferably, -0.6≤F1 / R1≤-0.2. Further, -0.4891≤F1 / R1≤-0.2796. By controlling this conditional expression, the effective focal length of the first lens and the first side surface radius of curvature can be controlled, and the first lens can effectively collect and bend a large-angle field of view light on the basis of a small aperture.

[0165] In an exemplary embodiment, the first side surface radius of curvature R9 of the fifth lens, the second side surface radius of curvature R12 of the sixth lens, and the first side surface radius of curvature R13 of the seventh lens satisfy: 1≤max {R9, R12, R13} / min {R9, R12, R13}≤1.75. Preferably, 1.02≤max {R9, R12, R13} / min {R9, R12, R13}≤1.5. Further, 1.0626≤max {R9, R12, R13} / min {R9, R12, R13}≤1.3926. Wherein, max {R9, R12, R13} is the maximum value of R9, R12, and R13, and min {R9, R12, R13} is the minimum value of R9, R12, and R13. By controlling this conditional expression, the maximum value and the minimum value of R9, R12, and R13 can be made close to each other, so that the bending degrees of the first side surface of the fifth lens, the second side surface of the sixth lens, and the first side surface of the seventh lens are close to each other, the angle of the light is less bent when the light is incident on the first side surface of the first cemented lens (the first side surface of the fifth lens) and the first side surface of the second cemented lens (the first side surface of the seventh lens), and then the sensitivity of the light at the first side surface of the fifth lens and the first side surface of the seventh lens is effectively reduced, and the imaging quality is improved.

[0166] In an exemplary embodiment, the first side surface radius of curvature R9 of the fifth lens and the total effective focal length F of the optical lens satisfy: 0.7≤R9 / F≤2.5. Preferably, 0.85≤R9 / F≤2. Further, 1.3268≤R9 / F≤1.639. By controlling this conditional expression, the first side surface radius of curvature of the fifth lens can be made smaller and close to the total effective focal length of the optical lens, the light is further compressed and converged after passing through the fourth lens, which is conducive to miniaturization, and the sensitivity is also reduced.

[0167] The optical lens according to the above-mentioned embodiments of the present application can adopt multiple lenses, for example, the nine lenses mentioned above. By reasonably allocating the optical parameters of each lens, the optical lens is small in aperture and size, high in resolution, low in sensitivity, large in angular resolution, large in field of view, small in chief angle, high in illumination, workable, and high in imaging quality in the visible light waveband and the infrared waveband, and can be well matched with, for example, a vehicle-mounted chip, without causing a dark corner phenomenon. The optical lens has good temperature performance, and the imaging effect changes little at high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above-mentioned embodiments of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0168] It should be understood by those skilled in the art that the total optical length TTL of the optical lens used in the above is the distance from the center of the first side of the first lens to the center of the imaging focal plane of the optical lens; the total image height H of the optical lens is the image height corresponding to the maximum field of view angle of the optical lens; and the total aperture D of the optical lens is the maximum light passing aperture of the first side of the first lens corresponding to the maximum field of view angle.

[0169] However, it should be understood by those skilled in the art that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, to obtain various results and advantages described in the present specification. For example, although the nine lenses are taken as an example in the embodiments, the optical lens is not limited to including nine lenses. If necessary, the optical lens can also include other numbers of lenses.

[0170] The specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0171] Embodiment 1

[0172] The following refers to Figure 1 The optical lens according to Embodiment 1 of the present application is described.

[0173] As shown in Figure 2 the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0174] The first lens L1 has a negative focal power, the first side S1 thereof is a convex surface, and the second side S2 thereof is a concave surface.

[0175] The second lens L2 has a negative focal power, the first side S3 is concave, and the second side S4 is convex.

[0176] The third lens L3 has a positive focal power, the first side S5 is convex, and the second side S6 is concave.

[0177] The fourth lens L4 has a positive focal power, the first side S7 is convex, and the second side S8 is convex.

[0178] The fifth lens L5 has a positive focal power, the first side S10 is convex, and the second side S11 is convex.

[0179] The sixth lens L6 has a negative focal power, the first side S11 is concave, and the second side S12 is concave.

[0180] The seventh lens L7 has a positive focal power, the first side S13 is convex, and the second side S14 is convex.

[0181] The eighth lens L8 has a negative focal power, the first side S14 is concave, and the second side S15 is convex.

[0182] The ninth lens L9 has a negative focal power, the first side S16 is convex, and the second side S17 is concave.

[0183] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0184] Table 1 shows the basic parameter table of the optical lens of embodiment 1.

[0185] Table 1

[0186]

[0187] In embodiment 1, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the surface type of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula

[0188] (1);

[0189] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient for the i-th order of the aspheric surface. Tables 2-1 and 2-2 list the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each of the aspheric surfaces S16 and S17 in Example 1.

[0190] Table 2-1

[0191]

[0192] Table 2-2

[0193]

[0194] Figure 3 This is the MTF diagram of the optical lens in Example 1 in the visible light band, Figure 4 This is the MTF graph of the optical lens in Example 1 in the infrared band. It can be seen that the optical lens in Example 1 can achieve high resolution in both the visible light band and the infrared band, and the focal points are close in the two bands. In other words, this optical lens can well achieve a dual-pass day and night confocal effect.

[0195] Example 2

[0196] The following reference Figure 4 Describe the optical lens according to Example 2 of the present application.

[0197] like Figure 5 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 of the ninth lens L9 has at least one inflection point.

[0198] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0199] The second lens L2 has negative refractive power, and its first side surface S3 and second side surface S4 are concave.

[0200] The third lens L3 has positive refractive power, and its first side surface S5 and second side surface S6 are convex.

[0201] The fourth lens L4 has positive refractive power, its first side S7 is a convex surface, and its second side S8 is a convex surface.

[0202] The fifth lens L5 has positive refractive power, its first side S10 is a convex surface, and its second side S11 is a convex surface.

[0203] The sixth lens L6 has negative refractive power, its first side S11 is a concave surface, and its second side S12 is a concave surface.

[0204] The seventh lens L7 has positive refractive power, its first side S13 is a convex surface, and its second side S14 is a convex surface.

[0205] The eighth lens L8 has negative refractive power, its first side S14 is a concave surface, and its second side S15 is a convex surface.

[0206] The ninth lens L9 has negative refractive power, its first side S16 is a convex surface, and its second side S17 is a concave surface.

[0207] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA. The optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0208] Table 3 shows a basic parameter table of the optical lens of Example 2.

[0209] Table 3

[0210]

[0211] In Example 2, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 4-1 and Table 4-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 2.

[0212] Table 4-1

[0213]

[0214] Table 4-2

[0215]

[0216] Figure 6 For the MTF diagram of the optical lens in Example 2 in the visible light waveband, Figure 7This is the MTF graph of the optical lens in Example 2 in the infrared band. It can be seen that the optical lens in Example 2 can achieve high resolution in both the visible light band and the infrared band, and the focal points are close in the two bands. In other words, this optical lens can well achieve a dual-pass day and night confocal effect.

[0217] Example 3

[0218] The following reference Figure 7 Describe the optical lens according to Example 3 of the present application.

[0219] like Figure 8 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 of the ninth lens L9 has at least one inflection point.

[0220] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0221] The second lens L2 has positive refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0222] The third lens L3 has positive refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0223] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0224] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0225] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0226] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0227] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0228] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0229] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0230] Table 5 shows a basic parameter table of the optical lens of Example 3.

[0231] Table 5

[0232]

[0233] In Example 3, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 6-1 and Table 6-2 give the conic coefficients k and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 3.

[0234] Table 6-1

[0235]

[0236] Table 6-2

[0237]

[0238] Figure 9 For the MTF diagram of the optical lens in Example 3 in the visible light waveband, Figure 10 For the MTF diagram of the optical lens in Example 3 in the infrared light waveband, it can be seen that the optical lens of Example 3 can achieve high resolution effect in both the visible light waveband and the infrared waveband, and the focal points are close in both wavebands, in other words, the optical lens can well achieve the dual-pass day and night confocal effect.

[0239] Example 4

[0240] The optical lens according to Example 4 of the present application is described below with reference to Figure 10 The optical lens according to Example 4 of the present application is described below with reference to

[0241] As Figure 11As shown, the optical lens comprises, in order along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0242] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0243] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0244] The third lens L3 has a positive focal power, the first side S5 thereof is convex, and the second side S6 thereof is convex.

[0245] The fourth lens L4 has a positive focal power, the first side S7 thereof is convex, and the second side S8 thereof is convex.

[0246] The fifth lens L5 has a positive focal power, the first side S10 thereof is convex, and the second side S11 thereof is convex.

[0247] The sixth lens L6 has a negative focal power, the first side S11 thereof is concave, and the second side S12 thereof is concave.

[0248] The seventh lens L7 has a positive focal power, the first side S13 thereof is convex, and the second side S14 thereof is convex.

[0249] The eighth lens L8 has a negative focal power, the first side S14 thereof is concave, and the second side S15 thereof is convex.

[0250] The ninth lens L9 has a negative focal power, the first side S16 thereof is convex, and the second side S17 thereof is concave.

[0251] The second side of the optical lens is provided with an image plane IMA, and a filter IR and a protection glass CG are disposed between the ninth lens L9 and the image plane IMA. The filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on an object.

[0252] Table 7 shows the basic parameter table of the optical lens of embodiment 4.

[0253] Table 7

[0254]

[0255] In Example 4, the first side surface S16 and the second side surface S17 of the ninth lens L9 are both aspherical surfaces. Tables 8-1 and 8-2 show the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces S16 and S17 that can be used in Example 4.

[0256] Table 8-1

[0257]

[0258] Table 8-2

[0259]

[0260] Figure 12 This is the MTF diagram of the optical lens in Example 4 in the visible light band, Figure 13 This is the MTF graph of the optical lens in Example 4 in the infrared band. It can be seen that the optical lens in Example 4 can achieve high resolution in both the visible light band and the infrared band, and the focal points are close in the two bands. In other words, this optical lens can well achieve a dual-pass day and night confocal effect.

[0261] Example 5

[0262] The following reference Figure 13 Describe the optical lens according to Example 5 of the present application.

[0263] like Figure 14 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 of the ninth lens L9 has at least one inflection point.

[0264] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0265] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0266] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0267] The fourth lens L4 has positive refractive power, its first side S7 is convex, and its second side S8 is convex.

[0268] The fifth lens L5 has positive refractive power, its first side S10 is convex, and its second side S11 is convex.

[0269] The sixth lens L6 has negative refractive power, its first side S11 is concave, and its second side S12 is concave.

[0270] The seventh lens L7 has positive refractive power, its first side S13 is convex, and its second side S14 is convex.

[0271] The eighth lens L8 has negative refractive power, its first side S14 is concave, and its second side S15 is convex.

[0272] The ninth lens L9 has negative refractive power, its first side S16 is convex, and its second side S17 is concave.

[0273] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0274] Table 9 shows a basic parameter table of the optical lens of embodiment 5.

[0275] Table 9

[0276]

[0277] In embodiment 5, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and table 10-1 and table 10-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in embodiment 5.

[0278] Table 10-1

[0279]

[0280] Table 10-2

[0281]

[0282] Figure 15 For the MTF diagram of the optical lens in embodiment 5 in the visible light waveband, Figure 16The following is the MTF graph of the optical lens in Example 5 in the infrared band. It can be seen that the optical lens in Example 5 can achieve high resolution in both the visible light band and the infrared band, and the focal points are close in the two bands. In other words, this optical lens can well achieve a dual-pass day and night confocal effect.

[0283] Example 6

[0284] The following reference Figure 16 Describe the optical lens according to Example 6 of the present application.

[0285] like Figure 17 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0286] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0287] The second lens L2 has positive refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0288] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0289] The fourth lens L4 has positive refractive power, a first side surface S7 of the fourth lens L4 is convex, and a second side surface S8 of the fourth lens L4 is concave.

[0290] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0291] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0292] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0293] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0294] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0295] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0296] Table 11 shows a basic parameter table of the optical lens of Example 6.

[0297] Table 11

[0298]

[0299] In Example 6, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 12-1 and Table 12-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 6.

[0300] Table 12-1

[0301]

[0302] Table 12-2

[0303]

[0304] Example 7

[0305] The following refers to Figure 17 An optical lens according to Example 7 of the present application is described.

[0306] As shown in Figure 18 the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0307] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0308] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0309] The third lens L3 has positive refractive power, its first side S5 is convex, and its second side S6 is concave.

[0310] The fourth lens L4 has positive refractive power, its first side S7 is concave, and its second side S8 is convex.

[0311] The fifth lens L5 has positive refractive power, its first side S10 is convex, and its second side S11 is convex.

[0312] The sixth lens L6 has negative refractive power, its first side S11 is concave, and its second side S12 is concave.

[0313] The seventh lens L7 has positive refractive power, its first side S13 is convex, and its second side S14 is convex.

[0314] The eighth lens L8 has negative refractive power, its first side S14 is concave, and its second side S15 is convex.

[0315] The ninth lens L9 has negative refractive power, its first side S16 is convex, and its second side S17 is concave.

[0316] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0317] Table 13 shows the basic parameter table of the optical lens of embodiment 7.

[0318] Table 13

[0319]

[0320] In embodiment 7, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 7 are given in Table 14-1 and Table 14-2.

[0321] Table 14-1

[0322]

[0323] Table 14-2

[0324]

[0325] Example 8

[0326] The following reference Figure 18 Describe the optical lens according to Example 8 of the present application.

[0327] like Figure 19 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0328] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0329] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0330] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0331] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0332] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0333] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0334] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0335] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0336] The ninth lens L9 has positive refractive power, a first side surface S16 of the ninth lens L9 is convex, and a second side surface S17 of the ninth lens L9 is concave.

[0337] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0338] Table 15 shows the basic parameter table of the optical lens of Example 8.

[0339] Table 15

[0340]

[0341] In Example 8, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 16-1 and Table 16-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 8.

[0342] Table 16-1

[0343]

[0344] Table 16-2

[0345]

[0346] Example 9

[0347] The following refers to Figure 19 An optical lens according to Example 9 of the present application is described.

[0348] As shown in Figure 20 , the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The second side S17 of the ninth lens L9 has at least one inflection point.

[0349] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0350] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0351] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0352] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0353] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0354] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0355] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0356] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0357] The ninth lens L9 has negative refractive power, and its first side surface S16 and second side surface S17 are concave.

[0358] The second side of the optical lens is provided with an image plane IMA. A filter IR and a protective glass CG are disposed between the ninth lens element L9 and the image plane IMA. The filter IR has a first side surface S18 and a second side surface S19, and the protective glass CG has a first side surface S20 and a second side surface S21. When the IMA serves as the imaging plane, light from an object sequentially passes through each surface and is ultimately imaged on the IMA. When the IMA serves as the image source plane, light from the IMA sequentially passes through each surface and is ultimately projected onto the object.

[0359] Table 17 shows the basic parameters of the optical lens of Example 9.

[0360] Table 17

[0361]

[0362] In Example 9, the first side surface S16 and the second side surface S17 of the ninth lens L9 are both aspherical surfaces. Tables 18-1 and 18-2 show the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces S16 and S17 that can be used in Example 9.

[0363] Table 18-1

[0364]

[0365] Table 18-2

[0366]

[0367] Example 10

[0368] The following reference Figure 20 The optical lens according to Example 10 of the present application is described.

[0369] like Figure 21 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens.

[0370] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0371] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0372] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0373] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0374] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0375] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0376] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0377] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0378] The ninth lens L9 has negative refractive power, a first side surface S16 of the ninth lens L9 is concave, and a second side surface S17 of the ninth lens L9 is convex.

[0379] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0380] Table 19 shows a basic parameter table of the optical lens of Example 10.

[0381] Table 19

[0382]

[0383] In Example 10, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 20-1 and Table 20-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 10.

[0384] Table 20-1

[0385]

[0386] Table 20-2

[0387]

[0388] Example 11

[0389] The following refers to Figure 21 An optical lens according to Example 11 of the present application is described.

[0390] As shown in Figure 22 , the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens.

[0391] The first lens L1 has a negative refractive power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0392] The second lens L2 has a negative refractive power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0393] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0394] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0395] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0396] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0397] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0398] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0399] The ninth lens L9 has positive refractive power, the first side S16 is concave, and the second side S17 is convex.

[0400] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0401] Table 21 shows the basic parameter table of the optical lens of embodiment 11.

[0402] Table 21

[0403]

[0404] In embodiment 11, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in embodiment 11 are given in Table 22-1 and Table 22-2.

[0405] Table 22-1

[0406]

[0407] Table 22-2

[0408]

[0409] Example 12

[0410] The following reference Figure 22 Describe the optical lens according to Example 12 of the present application.

[0411] like Figure 23 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens.

[0412] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0413] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0414] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0415] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0416] The fifth lens L5 has positive refractive power, a first side surface S10 of which is convex, and a second side surface S11 of which is concave.

[0417] The sixth lens L6 has negative refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0418] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0419] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0420] The ninth lens L9 has negative refractive power, and its first side surface S16 and second side surface S17 are concave.

[0421] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0422] Table 23 shows a basic parameter table of the optical lens of Example 12.

[0423] Table 23

[0424]

[0425] In Example 12, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 24-1 and Table 24-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 12.

[0426] Table 24-1

[0427]

[0428] Table 24-2

[0429]

[0430] Example 13

[0431] The following refers to Figure 23 An optical lens according to Example 13 of the present application is described.

[0432] As Figure 24 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens.

[0433] The first lens L1 has a negative refractive power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0434] The second lens L2 has a negative refractive power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0435] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0436] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0437] The fifth lens L5 has negative refractive power, the first side S10 is convex, and the second side S11 is concave.

[0438] The sixth lens L6 has positive refractive power, the first side S11 is convex, and the second side S12 is concave.

[0439] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0440] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0441] The ninth lens L9 has negative refractive power, the first side S16 is concave, and the second side S17 is concave.

[0442] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0443] Table 25 shows the basic parameter table of the optical lens of embodiment 13.

[0444] Table 25

[0445]

[0446] In embodiment 13, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in embodiment 13 are given in Table 26-1 and Table 26-2.

[0447] Table 26-1

[0448]

[0449] Table 26-2

[0450]

[0451] Example 14

[0452] The following reference Figure 24 Describe the optical lens according to Example 14 of the present application.

[0453] like Figure 25 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0454] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0455] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0456] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0457] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0458] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0459] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0460] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0461] The eighth lens L8 has negative refractive power, and its first side surface S14 and second side surface S15 are concave.

[0462] The ninth lens L9 has positive refractive power, a first side surface S16 of the lens is convex, and a second side surface S17 of the lens is concave.

[0463] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0464] Table 27 shows the basic parameter table of the optical lens of Example 14.

[0465] Table 27

[0466]

[0467] In Example 14, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 28-1 and Table 28-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 14.

[0468] Table 28-1

[0469]

[0470] Table 28-2

[0471]

[0472] Example 15

[0473] The following refers to Figure 25 An optical lens according to Example 15 of the present application is described.

[0474] As Figure 26 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 and the second side S17 of the ninth lens L9 each have at least one inflection point.

[0475] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0476] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0477] The third lens L3 has negative focal power, its first side S5 is convex, and its second side S6 is concave.

[0478] The fourth lens L4 has positive focal power, its first side S7 is convex, and its second side S8 is convex.

[0479] The fifth lens L5 has positive focal power, its first side S10 is convex, and its second side S11 is convex.

[0480] The sixth lens L6 has negative focal power, its first side S11 is concave, and its second side S12 is concave.

[0481] The seventh lens L7 has negative focal power, its first side S13 is convex, and its second side S14 is concave.

[0482] The eighth lens L8 has positive focal power, its first side S14 is convex, and its second side S15 is convex.

[0483] The ninth lens L9 has negative focal power, its first side S16 is convex, and its second side S17 is concave.

[0484] The second side of the optical lens is provided with an image plane IMA, and a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0485] Table 29 shows the basic parameter table of the optical lens of embodiment 15.

[0486] Table 29

[0487]

[0488] In embodiment 15, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 15 are given in Table 30-1 and Table 30-2.

[0489] Table 30-1

[0490]

[0491] Table 30-2

[0492]

[0493] Example 16

[0494] The following reference Figure 26 Describe the optical lens according to Example 16 of the present application.

[0495] like Figure 27 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0496] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0497] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0498] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0499] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0500] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0501] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0502] The seventh lens L7 has negative refractive power, and its first side surface S13 is convex, and its second side surface S14 is concave.

[0503] The eighth lens L8 has positive refractive power, a first side surface S14 thereof is convex, and a second side surface S15 thereof is concave.

[0504] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0505] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0506] Table 31 shows a basic parameter table of the optical lens of Example 16.

[0507] Table 31

[0508]

[0509] In Example 16, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 32-1 and Table 32-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 16.

[0510] Table 32-1

[0511]

[0512] Table 32-2

[0513]

[0514] Example 17

[0515] The following refers to Figure 27 An optical lens according to Example 17 of the present application is described.

[0516] As Figure 28 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0517] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0518] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0519] The third lens L3 has positive refractive power, the first side S5 is convex, and the second side S6 is concave.

[0520] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0521] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0522] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0523] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0524] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0525] The ninth lens L9 has negative refractive power, the first side S16 is convex, and the second side S17 is concave.

[0526] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0527] Table 33 shows the basic parameter table of the optical lens of embodiment 17.

[0528] Table 33

[0529]

[0530] In embodiment 17, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 17 are given in Table 34-1 and Table 34-2.

[0531] Table 34-1

[0532]

[0533] Table 34-2

[0534]

[0535] Example 18

[0536] The following reference Figure 28 Describe the optical lens according to Example 18 of the present application.

[0537] like Figure 29 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 of the ninth lens L9 has at least one inflection point.

[0538] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0539] The second lens L2 has negative refractive power, and its first side surface S3 and second side surface S4 are concave.

[0540] The third lens L3 has positive refractive power, and its first side surface S5 and second side surface S6 are convex.

[0541] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0542] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0543] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0544] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0545] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0546] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0547] The second side of the optical lens is provided with an image plane IMA. A filter IR and a protective glass CG are disposed between the ninth lens element L9 and the image plane IMA. The filter IR has a first side surface S18 and a second side surface S19, and the protective glass CG has a first side surface S20 and a second side surface S21. When the IMA serves as the imaging plane, light from an object sequentially passes through each surface and is ultimately imaged on the IMA. When the IMA serves as the image source plane, light from the IMA sequentially passes through each surface and is ultimately projected onto the object.

[0548] Table 35 shows the basic parameter table of the optical lens of Example 18.

[0549] Table 35

[0550]

[0551] In Example 18, the first side surface S16 and the second side surface S17 of the ninth lens L9 are both aspherical surfaces. Tables 36-1 and 36-2 show the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces S16 and S17 that can be used in Example 18.

[0552] Table 36-1

[0553]

[0554] Table 36-2

[0555]

[0556] Example 19

[0557] The following reference Figure 29 Describe the optical lens according to Example 19 of the present application.

[0558] like Figure 30 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 of the ninth lens L9 has at least one inflection point.

[0559] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0560] The second lens L2 has positive refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0561] The third lens L3 has positive refractive power, its first side S5 is convex, and its second side S6 is concave.

[0562] The fourth lens L4 has positive refractive power, its first side S7 is convex, and its second side S8 is convex.

[0563] The fifth lens L5 has positive refractive power, its first side S10 is convex, and its second side S11 is convex.

[0564] The sixth lens L6 has negative refractive power, its first side S11 is concave, and its second side S12 is concave.

[0565] The seventh lens L7 has positive refractive power, its first side S13 is convex, and its second side S14 is convex.

[0566] The eighth lens L8 has negative refractive power, its first side S14 is concave, and its second side S15 is convex.

[0567] The ninth lens L9 has negative refractive power, its first side S16 is convex, and its second side S17 is concave.

[0568] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0569] Table 37 shows the basic parameter table of the optical lens of embodiment 19.

[0570] Table 37

[0571]

[0572] In embodiment 19, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 19 are given in Table 38-1 and Table 38-2.

[0573] Table 38-1

[0574]

[0575] Table 38-2

[0576]

[0577] Embodiment 20

[0578] The optical lens according to Embodiment 20 of the present application is described below with reference to Figure 30 The optical lens according to Embodiment 20 of the present application is described below with reference to

[0579] As shown in Figure 31 The optical lens comprises, in order from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0580] The first lens L1 has negative refractive power, the first side S1 is convex, and the second side S2 is concave.

[0581] The second lens L2 has negative refractive power, the first side S3 is concave, and the second side S4 is convex.

[0582] The third lens L3 has positive refractive power, the first side S5 is convex, and the second side S6 is convex.

[0583] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0584] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0585] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0586] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0587] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0588] The ninth lens L9 has negative refractive power, the first side S16 is convex, and the second side S17 is concave.

[0589] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0590] Table 39 shows the basic parameter table of the optical lens of Example 20.

[0591] Table 39

[0592]

[0593] In Example 20, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 40-1 and Table 40-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 20.

[0594] Table 40-1

[0595]

[0596] Table 40-2

[0597]

[0598] Example 21

[0599] The following refers to Figure 31 An optical lens according to Example 21 of the present application is described.

[0600] As shown in Figure 32 , the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0601] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0602] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0603] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0604] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0605] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0606] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0607] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0608] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0609] The ninth lens L9 has negative refractive power, the first side S16 is convex, and the second side S17 is concave.

[0610] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0611] Table 41 shows the basic parameter table of the optical lens of embodiment 21.

[0612] Table 41

[0613]

[0614] In embodiment 21, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 21 are given in Table 42-1 and Table 42-2.

[0615] Table 42-1

[0616]

[0617] Table 42-2

[0618]

[0619] Example 22

[0620] The following reference Figure 32 Describe the optical lens according to Example 22 of the present application.

[0621] like Figure 33 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0622] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0623] The second lens L2 has positive refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0624] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0625] The fourth lens L4 has positive refractive power, a first side surface S7 of the fourth lens L4 is convex, and a second side surface S8 of the fourth lens L4 is concave.

[0626] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0627] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0628] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0629] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0630] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0631] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0632] Table 43 shows the basic parameter table of the optical lens of Example 22.

[0633] Table 43

[0634]

[0635] In Example 22, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 44-1 and Table 44-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 22.

[0636] Table 44-1

[0637]

[0638] Table 44-2

[0639]

[0640] Example 23

[0641] The following refers to Figure 33 An optical lens according to Example 23 of the present application is described.

[0642] As Figure 34 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 of the ninth lens L9 has at least one inflection point.

[0643] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0644] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0645] The third lens L3 has positive refractive power, the first side S5 is convex, and the second side S6 is concave.

[0646] The fourth lens L4 has positive refractive power, the first side S7 is concave, and the second side S8 is convex.

[0647] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0648] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0649] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0650] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0651] The ninth lens L9 has negative refractive power, the first side S16 is convex, and the second side S17 is concave.

[0652] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0653] Table 45 shows the basic parameter table of the optical lens of embodiment 23.

[0654] Table 45

[0655]

[0656] In embodiment 23, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in embodiment 23 are given in Table 46-1 and Table 46-2.

[0657] Table 46-1

[0658]

[0659] Table 46-2

[0660]

[0661] Example 24

[0662] The following reference Figure 34 Describe the optical lens according to Example 24 of the present application.

[0663] like Figure 35 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0664] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0665] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0666] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0667] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0668] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0669] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0670] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0671] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0672] The ninth lens L9 has positive refractive power, a first side surface S16 of the lens is convex, and a second side surface S17 of the lens is concave.

[0673] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0674] Table 47 shows the basic parameter table of the optical lens of Example 24.

[0675] Table 47

[0676]

[0677] In Example 24, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 48-1 and Table 48-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 24.

[0678] Table 48-1

[0679]

[0680] Table 48-2

[0681]

[0682] Example 25

[0683] The following refers to Figure 35 An optical lens according to Example 25 of the present application is described.

[0684] As Figure 36 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The second side S17 of the ninth lens L9 has at least one inflection point.

[0685] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0686] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0687] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0688] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0689] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0690] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0691] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0692] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0693] The ninth lens L9 has negative refractive power, the first side S16 is concave, and the second side S17 is concave.

[0694] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0695] Table 49 shows the basic parameter table of the optical lens of embodiment 25.

[0696] Table 49

[0697]

[0698] In embodiment 25, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 25 are given in Table 50-1 and Table 50-2.

[0699] Table 50-1

[0700]

[0701] Table 50-2

[0702]

[0703] Example 26

[0704] The following reference Figure 36 Describe the optical lens according to Example 26 of the present application.

[0705] like Figure 37 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens.

[0706] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0707] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0708] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0709] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0710] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0711] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0712] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0713] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0714] The ninth lens L9 has negative refractive power, a first side surface S16 of the ninth lens L9 is concave, and a second side surface S17 of the ninth lens L9 is convex.

[0715] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0716] Table 51 shows a basic parameter table of the optical lens of Example 26.

[0717] Table 51

[0718]

[0719] In Example 26, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 52-1 and Table 52-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 26.

[0720] Table 52-1

[0721]

[0722] Table 52-2

[0723]

[0724] Example 27

[0725] The following refers to Figure 37 An optical lens according to Example 27 of the present application is described.

[0726] As Figure 38 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens.

[0727] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0728] The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0729] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0730] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0731] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0732] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0733] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0734] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0735] The ninth lens L9 has positive refractive power, the first side S16 is concave, and the second side S17 is convex.

[0736] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protective glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protective glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0737] Table 53 shows the basic parameter table of the optical lens of embodiment 27.

[0738] Table 53

[0739]

[0740] In embodiment 27, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in embodiment 27 are given in Table 54-1 and Table 54-2.

[0741] Table 54-1

[0742]

[0743] Table 54-2

[0744]

[0745] Example 28

[0746] The following reference Figure 38 Describe the optical lens according to Example 28 of the present application.

[0747] like Figure 39 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens.

[0748] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0749] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0750] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0751] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0752] The fifth lens L5 has positive refractive power, a first side surface S10 of which is convex, and a second side surface S11 of which is concave.

[0753] The sixth lens L6 has negative refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0754] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0755] The eighth lens L8 has negative refractive power, a first side surface S14 thereof is concave, and a second side surface S15 thereof is convex.

[0756] The ninth lens L9 has negative refractive power, and its first side surface S16 and second side surface S17 are concave.

[0757] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0758] Table 55 shows the basic parameter table of the optical lens of Example 28.

[0759] Table 55

[0760]

[0761] In Example 28, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 56-1 and Table 56-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 28.

[0762] Table 56-1

[0763]

[0764] Table 56-2

[0765]

[0766] Example 29

[0767] The following refers to Figure 39 An optical lens according to Example 29 of the present application is described.

[0768] As Figure 40 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens.

[0769] The first lens L1 has a negative refractive power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0770] The second lens L2 has a negative refractive power, the first side S3 thereof is concave, and the second side S4 thereof is convex.

[0771] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0772] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0773] The fifth lens L5 has negative refractive power, the first side S10 is convex, and the second side S11 is concave.

[0774] The sixth lens L6 has positive refractive power, the first side S11 is convex, and the second side S12 is concave.

[0775] The seventh lens L7 has positive refractive power, the first side S13 is convex, and the second side S14 is convex.

[0776] The eighth lens L8 has negative refractive power, the first side S14 is concave, and the second side S15 is convex.

[0777] The ninth lens L9 has negative refractive power, the first side S16 is concave, and the second side S17 is concave.

[0778] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0779] Table 57 shows the basic parameter table of the optical lens of embodiment 29.

[0780] Table 57

[0781]

[0782] In embodiment 29, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in embodiment 29 are given in Table 58-1 and Table 58-2.

[0783] Table 58-1

[0784]

[0785] Table 58-2

[0786]

[0787] Example 30

[0788] The following reference Figure 40 An optical lens according to Example 30 of the present application is described.

[0789] like Figure 41 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0790] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0791] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0792] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0793] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0794] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0795] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0796] The seventh lens L7 has positive refractive power, and its first side surface S13 and second side surface S14 are convex.

[0797] The eighth lens L8 has negative refractive power, and its first side surface S14 and second side surface S15 are concave.

[0798] The ninth lens L9 has positive refractive power, a first side surface S16 of the ninth lens L9 is convex, and a second side surface S17 of the ninth lens L9 is concave.

[0799] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0800] Table 59 shows the basic parameter table of the optical lens of Example 30.

[0801] Table 59

[0802]

[0803] In Example 30, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 60-1 and Table 60-2 give the conic coefficients k and high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 30.

[0804] Table 60-1

[0805]

[0806] Table 60-2

[0807]

[0808] Example 31

[0809] The following refers to Figure 41 An optical lens according to Example 31 of the present application is described.

[0810] As shown in Figure 42 , the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens. The first side S16 and the second side S17 of the ninth lens L9 each have at least one inflection point.

[0811] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave.

[0812] The second lens L2 has a negative focal power, its first side S3 is concave, and its second side S4 is convex.

[0813] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0814] The fourth lens L4 has positive refractive power, the first side S7 is convex, and the second side S8 is convex.

[0815] The fifth lens L5 has positive refractive power, the first side S10 is convex, and the second side S11 is convex.

[0816] The sixth lens L6 has negative refractive power, the first side S11 is concave, and the second side S12 is concave.

[0817] The seventh lens L7 has negative refractive power, the first side S13 is convex, and the second side S14 is concave.

[0818] The eighth lens L8 has positive refractive power, the first side S14 is convex, and the second side S15 is convex.

[0819] The ninth lens L9 has negative refractive power, the first side S16 is convex, and the second side S17 is concave.

[0820] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0821] Table 61 shows the basic parameter table of the optical lens of embodiment 31.

[0822] Table 61

[0823]

[0824] In embodiment 31, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 31 are given in Table 62-1 and Table 62-2.

[0825] Table 62-1

[0826]

[0827] Table 62-2

[0828]

[0829] Example 32

[0830] The following reference Figure 42 Describe the optical lens according to Example 32 of the present application.

[0831] like Figure 43 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0832] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0833] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0834] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0835] The fourth lens L4 has positive refractive power, and its first side surface S7 and second side surface S8 are convex.

[0836] The fifth lens L5 has positive refractive power, and its first side surface S10 and second side surface S11 are convex.

[0837] The sixth lens L6 has negative refractive power, and its first side surface S11 and second side surface S12 are concave.

[0838] The seventh lens L7 has negative refractive power, and its first side surface S13 is convex, and its second side surface S14 is concave.

[0839] The eighth lens L8 has positive refractive power, a first side surface S14 thereof is convex, and a second side surface S15 thereof is concave.

[0840] The ninth lens L9 has negative refractive power, and its first side surface S16 is convex, and its second side surface S17 is concave.

[0841] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0842] Table 63 shows the basic parameter table of the optical lens of Example 32.

[0843] Table 63

[0844]

[0845] In Example 32, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and Table 64-1 and Table 64-2 give the conic constant k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 32.

[0846] Table 64-1

[0847]

[0848] Table 64-2

[0849]

[0850] Example 33

[0851] The following refers to Figure 43 An optical lens according to Example 33 of the present application is described.

[0852] As Figure 44 shown, the optical lens sequentially comprises, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8 and a ninth lens L9. A stop STO can be arranged between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented to form a first cemented lens, the seventh lens L7 and the eighth lens L8 are cemented to form a second cemented lens, and the third lens L3 and the fourth lens L4 are cemented to form a third cemented lens. The first side S16 and the second side S17 of the ninth lens L9 each have at least one inflection point.

[0853] The first lens L1 has a negative focal power, the first side S1 thereof is convex, and the second side S2 thereof is concave.

[0854] The second lens L2 has negative refractive power, the first side S3 is concave, and the second side S4 is convex.

[0855] The third lens L3 has negative refractive power, the first side S5 is convex, and the second side S6 is concave.

[0856] The fourth lens L4 has positive refractive power, the first side S6 is convex, and the second side S7 is convex.

[0857] The fifth lens L5 has positive refractive power, the first side S9 is convex, and the second side S10 is convex.

[0858] The sixth lens L6 has negative refractive power, the first side S10 is concave, and the second side S11 is concave.

[0859] The seventh lens L7 has positive refractive power, the first side S12 is convex, and the second side S13 is convex.

[0860] The eighth lens L8 has negative refractive power, the first side S13 is concave, and the second side S14 is convex.

[0861] The ninth lens L9 has negative refractive power, the first side S15 is convex, and the second side S16 is concave.

[0862] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 is provided with an optical filter IR and a protection glass CG between the ninth lens L9 and the image plane IMA, the optical filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0863] Table 65 shows the basic parameter table of the optical lens of embodiment 33.

[0864] Table 65

[0865]

[0866] In embodiment 33, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in embodiment 33 are given in Table 66-1 and Table 66-2.

[0867] Table 66-1

[0868]

[0869] Table 66-2

[0870]

[0871] Example 34

[0872] The following reference Figure 44 Describe the optical lens according to Example 34 of the present application.

[0873] like ​ As shown, the optical lens includes, from the first side to the second side along the optical axis, the following: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO may be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a first cemented lens, the seventh lens L7 and the eighth lens L8 are cemented together to form a second cemented lens, and the third lens L3 and the fourth lens L4 are cemented together to form a third cemented lens. The first side surface S16 and the second side surface S17 of the ninth lens L9 each have at least one inflection point.

[0874] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is convex, and a second side surface S2 of the first lens L1 is concave.

[0875] The second lens L2 has negative refractive power, a first side surface S3 thereof is concave, and a second side surface S4 thereof is convex.

[0876] The third lens L3 has negative refractive power, a first side surface S5 of the third lens L3 is convex, and a second side surface S6 of the third lens L3 is concave.

[0877] The fourth lens L4 has positive refractive power, and its first side surface S6 and second side surface S7 are convex.

[0878] The fifth lens L5 has positive refractive power, and its first side surface S9 and second side surface S10 are convex.

[0879] The sixth lens L6 has negative refractive power, and its first side surface S10 and second side surface S11 are concave.

[0880] The seventh lens L7 has positive refractive power, and its first side surface S12 is convex, and its second side surface S13 is convex.

[0881] The eighth lens L8 has negative refractive power, a first side surface S13 of the eighth lens L8 is concave, and a second side surface S14 of the eighth lens L8 is convex.

[0882] The ninth lens L9 has negative refractive power, and its first side surface S15 is convex, and its second side surface S16 is concave.

[0883] The second side of the optical lens is provided with an image plane IMA, a filter IR and a protection glass CG are arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19, and the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on an object.

[0884] Table 67 shows the basic parameter table of the optical lens of Example 34.

[0885] Table 67

[0886]

[0887] In Example 34, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces, and the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S16 and S17 that can be used in Example 34 are given in Table 68-1 and Table 68-2.

[0888] Table 68-1

[0889]

[0890] Table 68-2

[0891]

[0892] Tables 69-1 to 69-12 show the basic parameters of the optical lenses in Examples 1 to 34, such as d10, d11, d13, d14, TTL, d(L2~L8), d89, F, etc., where d(L2~L8)=d4+d6+d8+d9+d12, d4 is the center thickness of the air gap between the second lens and the third lens, d6 is the distance between the third lens and the fourth lens, d8 is the center distance between the second side of the fourth lens and the diaphragm, d9 is the center distance between the diaphragm and the first side of the fifth lens, and d12 is the center thickness of the air gap between the sixth lens and the seventh lens. E1-E34 correspond to Examples 1-34, respectively. R1-R18 are the radii of curvature of the first side of the first lens to the second side of the ninth lens, respectively, and the radii of curvature refer to the radii of curvature at the center of the corresponding side unless otherwise specified. Tables 70-1 to 70-12 show the numerical values corresponding to each relationship in Examples 1 to 34. Rmax represents max {R9, R12, R13}, and Rmin represents min {R9, R12, R13}.

[0893] Table 69-1

[0894]

[0895] Table 69-2

[0896]

[0897] Table 69-3

[0898]

[0899] Table 69-4

[0900]

[0901] Table 69-5

[0902]

[0903] Table 69-6

[0904]

[0905] Table 69-7

[0906]

[0907] Table 69-8

[0908]

[0909] Table 69-9

[0910]

[0911] Table 69-10

[0912]

[0913] Table 69-11

[0914]

[0915] Table 69-12

[0916]

[0917] Table 70-1

[0918]

[0919] Table 70-2

[0920]

[0921] Table 70-3

[0922]

[0923] Table 70-4

[0924]

[0925] Table 70-5

[0926]

[0927] Table 70-6

[0928]

[0929] Table 70-7

[0930]

[0931] Table 70-8

[0932]

[0933] Table 70-9

[0934]

[0935] Table 70-10

[0936]

[0937] Table 70-11

[0938]

[0939] Table 70-12

[0940]

[0941] The present application also provides an electronic device comprising the optical lens in the above exemplary embodiments and an imaging element for converting an optical image formed by the optical lens into an electrical signal, the imaging element being disposed on the second side of the optical lens, for example on an imaging surface, which can be, for example, a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0942] The present application also provides an electronic device comprising the optical lens in the above exemplary embodiments and a light source, the light source being located on the second side of the optical lens. Light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens and forms an image or illuminates an area on the first side.

[0943] The application also provides an electronic device, which comprises a first device and a second device. The first device can be, for example, a laser radar emitting device, and the second device can be, for example, a laser radar receiving device. The first device can comprise the optical lens and the light source in the above-described exemplary embodiments, and the light source is located at the second side of the optical lens. The light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side. The second device can comprise the optical lens and the imaging element for converting the optical image formed by the optical lens into an electrical signal in the above-described exemplary embodiments. The imaging element is arranged at the second side of the optical lens (for example, on the imaging surface). The imaging element can be, for example, a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0944] The above description is merely illustrative of the exemplary embodiments of the application and the principles of the technology employed. It is understood that the scope of the application is not limited to the specific combinations of technical features described above, and should also cover other technical solutions formed by any combination of the technical features described above or equivalent features, without departing from the inventive concept. For example, the technical solutions formed by replacing the above-described features with technical features having similar functions disclosed in the application (but not limited to) with each other.

Claims

1. An optical lens, characterized in that: The device comprises, in order from the first side to the second side along the optical axis: a first lens having negative optical power, wherein the first side surface is convex and the second side surface is concave; a second lens having optical power, wherein the first side surface of the second lens is concave; a third lens element having optical power and a convex first side surface; a fourth lens element having positive optical power; a fifth lens element having optical power, wherein the first side surface of the fifth lens element is convex; a sixth lens element having optical power, wherein the second side surface thereof is concave; a seventh lens element having optical power, wherein the first side surface thereof is convex; an eighth lens having optical power; and a ninth lens having optical power; The fifth lens and the sixth lens are cemented together to form a first cemented lens. The fifth lens and the sixth lens have opposite positive and negative optical powers, and the first cemented lens has positive optical power. The seventh lens and the eighth lens are cemented together to form a second cemented lens, the seventh lens and the eighth lens have opposite positive and negative optical power properties, and the second cemented lens has positive optical power; The number of lenses having optical power in the optical lens is nine; The optical lens satisfies: 5.7≤TTL / F≤8, 0.28≤R1 / FOV≤0.6, 0.15≤F×(1 / F56+1 / F78+1 / F9)≤0.65, 0.18≤F×(1 / F2+1 / F3+1 / F4)≤0.42; Among them, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, R1 is the radius of curvature of the first side surface of the first lens, FOV is the maximum field of view of the optical lens, F56 is the effective focal length of the first cemented lens, F78 is the effective focal length of the second cemented lens, F9 is the effective focal length of the ninth lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

2. The optical lens according to claim 1, wherein: The second lens has negative optical power, a first side surface thereof is concave, and a second side surface thereof is convex; or The second lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, The second lens has positive optical power, a first side surface of the second lens is concave, and a second side surface of the second lens is convex.

3. The optical lens according to claim 1, wherein: The third lens has positive optical power, a first side surface of the third lens is convex, and a second side surface of the third lens is concave; or The third lens has positive refractive power, and its first side surface is convex, and its second side surface is convex; or, The third lens has negative optical power, a first side surface of the third lens is convex, and a second side surface of the third lens is concave.

4. The optical lens according to claim 1, wherein: The first side surface of the fourth lens is convex, and the second side surface is convex; or, The first side surface of the fourth lens is convex, and the second side surface is concave; or, The first side surface of the fourth lens is concave, and the second side surface is convex.

5. The optical lens according to claim 1, wherein: The fifth lens has positive refractive power, and its first side surface is convex, and its second side surface is convex; or, The fifth lens has positive optical power, a first side surface thereof is convex, and a second side surface thereof is concave; or The fifth lens has negative optical power, a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is concave.

6. The optical lens according to claim 1, wherein: The sixth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, The sixth lens has negative optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave; or The sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave.

7. The optical lens according to claim 1, wherein: The seventh lens has positive refractive power, and its first side surface is convex, and its second side surface is convex; or, The seventh lens has negative optical power, a first side surface of the seventh lens is convex, and a second side surface of the seventh lens is concave.

8. The optical lens according to claim 1, wherein: The eighth lens has negative optical power, a first side surface thereof is concave, and a second side surface thereof is convex; or The eighth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, The eighth lens has positive refractive power, and its first side surface is convex, and its second side surface is convex; or, The eighth lens has positive optical power, a first side surface of the eighth lens is convex, and a second side surface of the eighth lens is concave.

9. The optical lens according to claim 1, wherein: The ninth lens has negative optical power, a first side surface of the ninth lens is convex, and a second side surface of the ninth lens is concave; or The ninth lens has positive optical power, a first side surface thereof is convex, and a second side surface thereof is concave; or The ninth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, The ninth lens has negative optical power, a first side surface thereof is concave, and a second side surface thereof is convex; or The ninth lens has positive refractive power, a first side surface of the ninth lens is concave, and a second side surface of the ninth lens is convex.

10. The optical lens according to any one of claims 1 to 9, wherein: The center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, the center thickness d13 of the seventh lens, the center thickness d14 of the eighth lens, and the total optical length TTL of the optical lens satisfy the following: 0.23≤(d10+d11+d13+d14) / TTL≤0.

42.

11. The optical lens according to any one of claims 1 to 9, wherein: The optical lens satisfies 0.03≤d(L2~L8) / TTL≤0.095, wherein d(L2~L8) is the sum of the center thicknesses of all air gaps between the second lens and the eighth lens, and TTL is the total optical length of the optical lens.

12. The optical lens according to any one of claims 1 to 9, wherein: A first side surface curvature radius R9 of the fifth lens, a first side surface curvature radius R13 of the seventh lens, and a second side surface curvature radius R12 of the sixth lens satisfy: 0.65≤(R9×R13) / (R12×R12)≤1.

35.

13. The optical lens according to any one of claims 1 to 9, wherein: The second side sag height SAG6 of the third lens and the first side sag height SAG7 of the fourth lens satisfy: 0.2≤|SAG6 / SAG7|≤5.

5.

14. The optical lens according to any one of claims 1 to 9, wherein: The effective focal length F56 of the first cemented lens and the total effective focal length F of the optical lens satisfy the following: 3.5≤F56 / F≤13.

5.

15. The optical lens according to any one of claims 1 to 9, wherein: The effective focal length F78 of the second cemented lens and the total effective focal length F of the optical lens satisfy the following: 1.0≤F78 / F≤5.

5.

16. The optical lens according to any one of claims 1 to 9, wherein: The full image height H of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the total effective focal length F of the optical lens satisfy the following conditions: 0.7≤(H / 2) / (F×tan(θ / 2))≤0.

9.

17. The optical lens according to any one of claims 1 to 9, wherein: The focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1.7≤F4 / F≤6.

8.

18. The optical lens according to any one of claims 1 to 9, wherein: The full aperture D of the optical lens, the full image height H of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following conditions: 0.85≤D / H / θ≤1.

45.

19. The optical lens according to any one of claims 1 to 9, wherein: The focal length F56 of the first cemented lens and the focal length F78 of the second cemented lens satisfy the following: 1.15≤F56 / F78≤12.

20. The optical lens according to any one of claims 1 to 9, wherein: A central thickness d89 of the air gap between the eighth lens and the ninth lens and a total effective focal length F of the optical lens satisfy the following: 0.01≤d89 / F≤0.

35.

21. The optical lens according to any one of claims 1 to 9, wherein: The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following: 1.55≤F / ENPD≤1.

75.

22. The optical lens according to any one of claims 1 to 9, wherein: The optical lens satisfies at least one of the following conditions: 0.1≤(d10+d11) / TTL≤0.175; 0.115≤(d13+d14) / TTL≤0.25; 0 <d56 / TTL≤0.02;0.6≤F / H≤0.8;2.8≤TTL / H / θ≤4;0.57≤(F×θ) / D≤0.8;3.5≤R1 / F≤7.2;-50≤R5 / (R6+d5)≤1.5;-2.4≤F1 / F≤-1.35;-15≤F4 / (dn / dt(4))≤-2.5;3≤|F2 / F|;3.5≤|F3 / F|;-7.5≤F5 / F6≤-0.5;-3≤F7 / F8≤-0.08;25≤|Vd7-Vd8|≤50;-1.4≤R2 / R3≤-0.125;-0.8≤F1 / R1≤-0.1;1≤max {R9、R12、R13} / min {R9、R12、R13}≤1.75 ;0.7≤R9 / F≤2.5; Wherein, d10 is the center thickness of the fifth lens, d11 is the center thickness of the sixth lens, TTL is the total optical length of the optical lens, d13 is the center thickness of the seventh lens, d14 is the center thickness of the eighth lens, F is the total effective focal length of the optical lens, H is the full image height of the optical lens, θ is the radian value of the maximum field angle of the optical lens, D is the full aperture of the optical lens, R1 is the first side curvature radius of the first lens, R5 is the first side curvature radius of the third lens, R6 is the second side curvature radius of the third lens, d5 is the center thickness of the third lens, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, dn / dt(4) is the curvature radius of the fourth lens at 20℃-95℃ relative refractive index temperature coefficient under temperature conditions, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, Vd7 is the Abbe number of the seventh lens, Vd8 is the Abbe number of the eighth lens, R2 is the second side surface curvature radius of the first lens, R3 is the first side surface curvature radius of the second lens, R9 is the first side surface curvature radius of the fifth lens, R12 is the second side surface curvature radius of the sixth lens, R13 is the first side surface curvature radius of the seventh lens, and d56 is the center-to-center distance between the second side surface of the fifth lens and the first side surface of the sixth lens.

23. The optical lens according to any one of claims 1 to 9, wherein: The optical lens satisfies at least one of the following conditions: 6.2≤TTL / F≤7.5,0.3≤R1 / FOV≤0.55 ,0.2≤F×(1 / F56+1 / F78+1 / F9)≤0.6,0.195≤F×(1 / F2+1 / F3+1 / F4)≤0.38;0.265≤(d10+d11+d13+d14) / TTL≤0.38;0.04≤d(L2~L8) / TTL≤0.085;0.7≤(R9×R13) / (R12×R12)≤1.25;0.24≤|SAG6 / SAG7|≤4.25;4≤F56 / F ≤12;1.15≤F78 / F≤4.5;0.8≤(H / 2) / (F×tan(θ / 2))≤0 .88;1.85≤F4 / F≤5.8;1.0≤D / H / θ≤1.2;1.35≤F56 / F78 ≤9.6;0.012≤d89 / F≤0.25;1.6≤F / ENPD≤1.68;0.115≤(d10+d11) / TTL≤0.16;0.13≤(d13+d14) / TTL≤0.22;0 <d56 / TTL≤0.01;0.65≤F / H≤0.75;3.25≤TTL / H / θ≤3.6;0.65≤(F×θ) / D≤0.72;3.8≤R1 / F≤6.85;-35≤R5 / (R6+d5)≤1.2;-2.2≤F1 / F≤-1.5;-12≤F4 / (dn / dt(4))≤-3.2;3.5≤|F2 / F|≤120;4.5≤|F3 / F|≤400;-6≤F5 / F6≤-0.72;-2.6≤F7 / F8≤-0.095;30≤|Vd7-Vd8|≤45;-1.2≤R2 / R3≤-0.15;-0.6≤F1 / R1≤-0.2;1.02≤max {R9、R12、R13} / min {R9、R12、R13}≤1.5 ;0.85≤R9 / F≤2; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, FOV is the maximum field of view of the optical lens, H is the full image height of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the full aperture of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R3 is the curvature radius of the first side surface of the second lens, R5 is the curvature radius of the first side surface of the third lens, R6 is the curvature radius of the second side surface of the third lens, R9 is the curvature radius of the first side surface of the fifth lens, R12 is the curvature radius of the second side surface of the sixth lens, R13 is the curvature radius of the first side surface of the seventh lens, F56 is the effective focal length of the first cemented lens, F78 is the effective focal length of the second cemented lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F9 is the effective focal length of the ninth lens. d5 is the center thickness of the third lens, d10 is the center thickness of the fifth lens, d11 is the center thickness of the sixth lens, d13 is the center thickness of the seventh lens, d14 is the center thickness of the eighth lens, d89 is the center thickness of the air gap between the eighth lens and the ninth lens, d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens, d(L2~L8) is the sum of the center thicknesses of all air gaps between the second lens and the eighth lens, SAG6 is the sag height of the second side surface of the third lens, SAG7 is the sag height of the first side surface of the fourth lens, dn / dt(4) is the relative refractive index temperature coefficient of the fourth lens under the temperature conditions of 20℃-95℃, Vd7 is the Abbe number of the seventh lens, and Vd8 is the Abbe number of the eighth lens.

24. The optical lens according to any one of claims 1 to 9, wherein: The optical lens satisfies at least one of the following conditions: 6.6135≤TTL / F≤7.0335,0.3486≤R1 / FOV≤0.5000,0.2592≤F×(1 / F56+1 / F78+1 / F9)≤0.5524,0.2227≤F×(1 / F2+1 / F3+1 / F4)≤0.3491;0.2800≤(d10+d11+d13+d14) / TTL≤0.3445;0.0496≤d(L2~L8) / TTL≤0.0800;0.7 500≤(R9×R13) / (R12×R12)≤1.1481;0.2795≤|SAG6 / SAG7|≤3.6783;4.8446≤F56 / F ≤10.8963;1.3049≤F78 / F≤3.9664;0.8258≤(H / 2) / (F×tan(θ / 2))≤0.8623;2.0226 ≤F4 / F≤5.0697 ;1.0180≤D / H / θ≤1.0221;1.5805 ≤F56 / F78≤8.3446 ;0.0150≤d89 / F≤0.2063;1.6≤F / ENPD≤1.68;0.1272 ≤(d10+d11) / TTL≤0.1489 ;0.1500 ≤(d13+d14) / TTL≤0.1957 ;0 <d56 / TTL≤0.01;0.6910≤F / H≤0.7195 ;3.3868≤TTL / H / θ≤3.4843;0.6763≤(F×θ) / D≤0.7050;4.2069 ≤R1 / F≤6.2567;-30.7374 ≤R5 / (R6+d5)≤1.0305 ;-2.0625 ≤F1 / F≤-1.6552;-10.5716≤F4 / (dn / dt(4))≤-4.3336;4.5140 ≤|F2 / F|≤96.5972;5.4539 ≤|F3 / F|≤333.0243;-5.2354 ≤F5 / F6≤-0.8718 ;-2.2141 ≤F7 / F8≤-0.1109;30≤|Vd7-Vd8|≤45;-0.8556 ≤R2 / R3≤-0.1932;-0.4891≤F1 / R1≤-0.2796;1.0626≤max {R9、R12、R13} / min {R9、R12、R13}≤1.3926 ;1.3268≤R9 / F≤1.639; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, FOV is the maximum field of view of the optical lens, H is the full image height of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the full aperture of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R1 is the curvature radius of the first side surface of the first lens, R2 is the curvature radius of the second side surface of the first lens, R3 is the curvature radius of the first side surface of the second lens, R5 is the curvature radius of the first side surface of the third lens, R6 is the curvature radius of the second side surface of the third lens, R9 is the curvature radius of the first side surface of the fifth lens, R12 is the curvature radius of the second side surface of the sixth lens, R13 is the curvature radius of the first side surface of the seventh lens, F56 is the effective focal length of the first cemented lens, F78 is the effective focal length of the second cemented lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F9 is the effective focal length of the ninth lens. d5 is the center thickness of the third lens, d10 is the center thickness of the fifth lens, d11 is the center thickness of the sixth lens, d13 is the center thickness of the seventh lens, d14 is the center thickness of the eighth lens, d89 is the center thickness of the air gap between the eighth lens and the ninth lens, d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens, d(L2~L8) is the sum of the center thicknesses of all air gaps between the second lens and the eighth lens, SAG6 is the sag height of the second side surface of the third lens, SAG7 is the sag height of the first side surface of the fourth lens, dn / dt(4) is the relative refractive index temperature coefficient of the fourth lens under the temperature conditions of 20℃-95℃, Vd7 is the Abbe number of the seventh lens, and Vd8 is the Abbe number of the eighth lens.

25. An electronic device, characterized in that: include: The optical lens according to any one of claims 1 to 24; as well as at least one of an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

Images