An optical imaging lens

Abstract

The present invention relates to the field of lens technology. The present invention discloses an optical imaging lens, which includes a first lens to a fifth lens in sequence along an optical axis from the object side to the image side; the first lens is a convexo-concave lens with a negative refractive power; the second lens is a convexo-concave lens with a negative refractive power; the third lens is a convexo-concave lens with a positive refractive power, the fourth lens is a convexo-convex lens with a positive refractive power, the fifth lens is a convexo-concave lens, the first lens and the third lens are both glass spherical lenses, and the second lens, the fourth lens and the fifth lens are all plastic aspherical lenses. The present invention has the advantages of short total system length, low cost, large field of view, high resolution, good distortion control, and good imaging quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of lenses, and particularly relates to an optical imaging lens. Background Art

[0002] With the continuous progress of science and technology and the continuous development of society, in recent years, optical imaging lenses have also developed rapidly. Optical imaging lenses are widely used in various fields such as smart phones, tablet computers, video conferencing, vehicle-mounted monitoring, security monitoring, UAV aerial photography, machine vision systems, laser cutting machines, etc. Therefore, the requirements for optical imaging lenses are getting higher and higher.

[0003] However, the existing optical imaging lenses for laser cutting guidance still have many deficiencies. For example, the total length of the optical system is too large, and the installation and use are limited; the number of lenses is too many, making the overall cost of the lens too high; the control of edge distortion is poor, making the captured image have obvious deformation, affecting the later image processing; the field of view angle is small, the captured frame of the lens is insufficient, and it is difficult to meet the required frame requirements; the resolution is low and the imaging quality is poor, etc. Therefore, it is necessary to improve it to meet the increasing requirements of consumers. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical imaging lens to solve the above-mentioned existing technical problems.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: an optical imaging lens, which sequentially includes a first lens to a fifth lens along an optical axis from the object side to the image side; the first lens to the fifth lens each include an object side facing the object side and allowing imaging light to pass through and an image side facing the image side and allowing imaging light to pass through;

[0006] The first lens has a negative refractive power, the object side of the first lens is a convex surface, and the image side of the first lens is a concave surface;

[0007] The second lens has a negative refractive power, the object side of the second lens is a convex surface, and the image side of the second lens is a concave surface;

[0008] The third lens has a positive refractive power, the object side of the third lens is a convex surface, and the image side of the third lens is a concave surface;

[0009] The fourth lens has a positive refractive power, the object side of the fourth lens is a convex surface, and the image side of the fourth lens is a convex surface;

[0010] The object side of the fifth lens is a convex surface, and the image side of the fifth lens is a concave surface;

[0011] Both the first lens and the third lens are made of glass materials, the second lens, the fourth lens and the fifth lens are all made of plastic materials, and the object sides and image sides of the second lens, the fourth lens and the fifth lens are all aspherical surfaces;

[0012] The optical imaging lens has only the above-mentioned first lens to fifth lens with refractive power.

[0013] Furthermore, the optical imaging lens further satisfies: -7.5mm < f1 < -5mm, -2.5mm < f2 < -1.5mm, 4.5mm < f3 < 5.7mm, 1.4mm < f4 < 2mm, -7mm < f5 < 9mm, where f1, f2, f3, f4, and f5 are the focal lengths of the first lens, second lens, third lens, fourth lens, and fifth lens, respectively.

[0014] Furthermore, the refractive index temperature coefficient of the fourth lens is negative.

[0015] Furthermore, the object side and image side of the second lens, fourth lens, and fifth lens are both high-order even aspherical surfaces.

[0016] Furthermore, it further includes a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.

[0017] Furthermore, the optical imaging lens further satisfies: D11 / R11 ≤ 1.2, 1 ≤ D12 / R12 ≤ 1.83, D21 / R21 ≤ 1.2, D31 / R31 ≤ 1.6, D32 / R32 ≤ 1.0, D41 / R41 ≤ 1.0, 0.7 ≤ ∣D42 / R42∣ ≤ 1.8, 0.2 ≤ D51 / R51 ≤ 1.5, D52 / R52 ≤ 1.0, where D11, D12, D21, D31, D32, D41, D42, D51, and D52 are the diameters of the object side of the first lens, image side of the first lens, object side of the second lens, object side of the third lens, image side of the third lens, object side of the fourth lens, image side of the fourth lens, object side of the fifth lens, and image side of the fifth lens, respectively, and R11, R12, R21, R31, R32, R41, R42, R51, and R52 are the curvature radii of the object side of the first lens, image side of the first lens, object side of the second lens, object side of the third lens, image side of the third lens, object side of the fourth lens, image side of the fourth lens, object side of the fifth lens, and image side of the fifth lens, respectively.

[0018] Furthermore, the third lens is made of H-ZF88 material.

[0019] Furthermore, the optical imaging lens further satisfies: TTL ≤ 10.00mm, where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis.

[0020] The beneficial technical effects of the present invention:

[0021] The present invention adopts five lenses with a hybrid glass and plastic design. By corresponding design of each lens, it has the advantages of short total optical system length, light weight, and strong practicability; low cost and feasibility of industrial mass production; perfect distortion control, small edge distortion of the captured image, which is beneficial for post-processing of the image; large field of view, large captured picture range, high image resolution, and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0024] Figure 2 It is an MTF graph of visible light 470 - 659nm of Embodiment 1 of the present invention;

[0025] Figure 3 It is a defocus curve graph of visible light 470 - 659nm at 60lp / mm of Embodiment 1 of the present invention;

[0026] Figure 4 It is a schematic diagram of the lateral chromatic aberration curve of Embodiment 1 of the present invention;

[0027] Figure 5 It is a field curvature and distortion curve graph of Embodiment 1 of the present invention;

[0028] Figure 6 It is a spot diagram of Embodiment 1 of the present invention;

[0029] Figure 7 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0030] Figure 8 It is an MTF graph of visible light 470 - 659nm of Embodiment 2 of the present invention;

[0031] Figure 9 It is a defocus curve graph of visible light 470 - 659nm at 60lp / mm of Embodiment 2 of the present invention;

[0032] Figure 10 It is a schematic diagram of the lateral chromatic aberration curve of Embodiment 2 of the present invention;

[0033] Figure 11 It is a field curvature and distortion curve graph of Embodiment 2 of the present invention;

[0034] Figure 12It is the spot diagram of the second embodiment of the present invention;

[0035] Figure 13 It is the structural schematic diagram of the third embodiment of the present invention;

[0036] Figure 14 It is the MTF diagram of visible light 470 - 659nm of the third embodiment of the present invention;

[0037] Figure 15 It is the defocus curve diagram of visible light 470 - 659nm at 60lp / mm of the third embodiment of the present invention;

[0038] Figure 16 It is the schematic diagram of lateral chromatic aberration curve of the third embodiment of the present invention;

[0039] Figure 17 It is the field curvature and distortion curve diagram of the third embodiment of the present invention;

[0040] Figure 18 It is the spot diagram of the third embodiment of the present invention;

[0041] Figure 19 It is the structural schematic diagram of the fourth embodiment of the present invention;

[0042] Figure 20 It is the MTF diagram of visible light 470 - 659nm of the fourth embodiment of the present invention;

[0043] Figure 21 It is the defocus curve diagram of visible light 470 - 659nm at 60lp / mm of the fourth embodiment of the present invention;

[0044] Figure 22 It is the schematic diagram of lateral chromatic aberration curve of the fourth embodiment of the present invention;

[0045] Figure 23 It is the field curvature and distortion curve diagram of the fourth embodiment of the present invention;

[0046] Figure 24 It is the spot diagram of the fourth embodiment of the present invention;

[0047] Figure 25 It is the structural schematic diagram of the fifth embodiment of the present invention;

[0048] Figure 26 It is the MTF diagram of visible light 470 - 659nm of the fifth embodiment of the present invention;

[0049] Figure 27 It is the defocus curve diagram of visible light 470 - 659nm at 60lp / mm of the fifth embodiment of the present invention;

[0050] Figure 28 It is the schematic diagram of lateral chromatic aberration curve of the fifth embodiment of the present invention;

[0051] Figure 29 It is the field curvature and distortion curve graph of the fifth embodiment of the present invention;

[0052] Figure 30 It is the spot diagram of the fifth embodiment of the present invention. Specific embodiments

[0053] To further illustrate each embodiment, the present invention provides accompanying drawings. These accompanying drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0054] Now, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0055] When it is said that "a lens has a positive refractive power (or negative refractive power)", it means that the paraxial refractive power calculated by the Gaussian optical theory of the lens is positive (or negative). When it is said that "the object side (or image side) of the lens", it is defined as a specific range where the imaging light passes through the lens surface. The judgment of the convexity and concavity of the lens surface can be based on the judgment method of those with ordinary knowledge in the field, that is, by the positive and negative signs of the radius of curvature (abbreviated as R value) to judge the convexity and concavity of the lens surface. The R value is commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of optical design software. Taking the object side as an example, when the R value is positive, it is determined that the object side is a convex surface; when the R value is negative, it is determined that the object side is a concave surface. Conversely, taking the image side as an example, when the R value is positive, it is determined that the image side is a concave surface; when the R value is negative, it is determined that the image side is a convex surface.

[0056] The present invention discloses an optical imaging lens, which sequentially includes a first lens to a fifth lens along an optical axis from the object side to the image side; the first lens to the fifth lens each include an object side facing the object side and allowing the imaging light to pass through and an image side facing the image side and allowing the imaging light to pass through.

[0057] The first lens has a negative refractive power, the object side of the first lens is a convex surface, and the image side of the first lens is a concave surface.

[0058] The second lens has a negative refractive power, the object side of the second lens is a convex surface, and the image side of the second lens is a concave surface.

[0059] The third lens has a positive refractive power, the object side of the third lens is a convex surface, and the image side of the third lens is a concave surface.

[0060] The fourth lens has a positive refractive power. The object side of the fourth lens is convex, and the image side of the fourth lens is convex.

[0061] The object side of the fifth lens is convex, and the image side of the fifth lens is concave.

[0062] Both the first lens and the third lens are made of glass materials. The second lens, the fourth lens, and the fifth lens are all made of plastic materials. The object sides and image sides of the second lens, the fourth lens, and the fifth lens are all aspherical surfaces. The second lens, the fourth lens, and the fifth lens are plastic aspherical lenses, which can better correct higher-order aberrations, reduce the image noise value, improve the image quality. At the same time, the plastic aspherical lenses evenly distribute the manufacturing cost, making the cost low, easy to mass-produce and use, and enhancing the product competitiveness.

[0063] The optical imaging lens with refractive power only includes the above-mentioned first lens to fifth lens. The present invention adopts five lenses, a glass-plastic hybrid design, and through corresponding designs of each lens, it has the advantages of short overall length of the optical system, light weight, and strong practicability; low cost, feasibility of industrial mass production; perfect distortion control, small edge deformation of the captured picture, which is beneficial to post-image processing; large field of view, large captured picture range, high image resolution, and good imaging quality.

[0064] Preferably, the optical imaging lens further satisfies: -7.5mm < f1 < -5mm, -2.5mm < f2 < -1.5mm, 4.5mm < f3 < 5.7mm, 1.4mm < f4 < 2mm, -7mm < f5 < 9mm, where f1, f2, f3, f4, and f5 are the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens respectively, which reduces the process sensitivity, improves the product yield, and reasonably distributes the optical power to improve the optical performance.

[0065] Preferably, the refractive index temperature coefficient of the fourth lens is negative, which can better control the temperature drift caused by the change of the external temperature, and can ensure that the optical imaging lens has a clear picture and no defocusing when used in the temperature range of -20°C to 70°C.

[0066] Preferably, the object sides and image sides of the second lens, the fourth lens, and the fifth lens are all high-order even aspherical surfaces, which is beneficial to correcting secondary spectrum and higher-order aberrations and improving the imaging quality.

[0067] Preferably, it further includes a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens to further improve the imaging quality.

[0068] Preferably, the optical imaging lens further satisfies: D11 / R11≤1.2, 1≤D12 / R12≤1.83, D21 / R21≤1.2, D31 / R31≤1.6, D32 / R32≤1.0, D41 / R41≤1.0, 0.7≤∣D42 / R42∣≤1.8, 0.2≤D51 / R51≤1.5, D52 / R52≤1.0, where D11, D12, D21, D31, D32, D41, D42, D51, and D52 are the diameters of the object side, the image side of the first lens, the object side of the second lens, the object side of the third lens, the image side of the third lens, the object side of the fourth lens, the image side of the fourth lens, the object side of the fifth lens, and the image side of the fifth lens, respectively, and R11, R12, R21, R31, R32, R41, R42, R51, and R52 are the curvature radii of the object side, the image side of the first lens, the object side of the second lens, the object side of the third lens, the image side of the third lens, the object side of the fourth lens, the image side of the fourth lens, the object side of the fifth lens, and the image side of the fifth lens, respectively, making the lens easy to process and reducing costs.

[0069] Preferably, the third lens is made of H-ZF88 material, and the deviation of the relative partial dispersion of this material from the "conventional line" is 0.039 larger, which plays a great role in optimizing chromatic aberration.

[0070] Preferably, the optical imaging lens further satisfies: TTL≤10.00mm, where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, further shortening the total length of the optical system.

[0071] The optical imaging lens of the present invention will be described in detail below with specific embodiments.

[0072] Embodiment 1

[0073] As Figure 1 shown, an optical imaging lens sequentially includes a first lens 1, a second lens 2, a third lens 3, a diaphragm 6, a fourth lens 4, a fifth lens 5, a filter 7, and an imaging surface 8 along an optical axis I from an object side A1 to an image side A2; the first lens 1 to the fifth lens 5 each include an object side facing the object side A1 and allowing imaging light to pass through and an image side facing the image side A2 and allowing imaging light to pass through.

[0074] The first lens 1 has a negative refractive power, the object side 11 of the first lens 1 is a convex surface, and the image side 12 of the first lens 1 is a concave surface.

[0075] The second lens 2 has a negative refractive power, the object side 21 of the second lens 2 is a convex surface, and the image side 22 of the second lens 2 is a concave surface.

[0076] The third lens 3 has a positive refractive power. The object side surface 31 of the third lens 3 is a convex surface, and the image side surface 32 of the third lens 3 is a concave surface.

[0077] The fourth lens 4 has a positive refractive power. The object side surface 41 of the fourth lens 4 is a convex surface, and the image side surface 42 of the fourth lens 4 is a convex surface.

[0078] The fifth lens 5 has a positive refractive power. The object side surface 51 of the fifth lens 5 is a convex surface, and the image side surface 52 of the fifth lens 5 is a concave surface.

[0079] Both the first lens 1 and the third lens 3 are made of glass materials. The second lens 2, the fourth lens 4, and the fifth lens 5 are all made of plastic materials. The object side surfaces and the image side surfaces of the second lens 2, the fourth lens 4, and the fifth lens 5 are all aspherical surfaces.

[0080] In this specific embodiment, the refractive index temperature coefficient of the fourth lens 4 is -100, but it is not limited to this.

[0081] In this specific embodiment, the aperture stop 6 is disposed between the third lens 3 and the fourth lens 4 to improve the overall performance. Of course, in other embodiments, the aperture stop 6 can also be disposed at other suitable positions.

[0082] The filter 7 is used to filter out light of unwanted wavelengths to prevent it from reaching the imaging surface 8 and affecting the imaging quality. For example, it can be an infrared filter.

[0083] The detailed optical data of this specific embodiment are shown in Table 1-1.

[0084] Table 1-1 Detailed Optical Data of Embodiment 1

[0085]

[0086] In this specific embodiment, the object side surface 21, the object side surface 41, the object side surface 51, the image side surface 22, the image side surface 42, and the image side surface 52 are defined according to the following aspherical curve formula:

[0087]

[0088] Where:

[0089] r is the distance from a point on the optical surface to the optical axis.

[0090] z is the sagitta of the point along the optical axis direction.

[0091] c is the curvature of the surface.

[0092] K is the conic constant of the surface.

[0093] A 2 、A 4 、A 6 、A8 、A 10 、A 12 、A 14 、A 16 are respectively the aspheric coefficients of the second order, fourth order, sixth order, eighth order, tenth order, twelfth order, fourteenth order, and sixteenth order.

[0094] For the detailed parameter data of each aspheric surface, please refer to the following table:

[0095] Surface K <![CDATA[A 4 > <![CDATA[A 6 > <![CDATA[A 8 > <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 <!-- 5 -->]]> 21 -2.89 1.823E-02 -4.443E-03 3.320E-04 4.362E-07 -7.237E-08 -1.701E-07 3.396E-09 22 -1.02 2.652E-02 5.173E-02 -4.784E-02 1.117E-02 3.064E-05 -3.361E-04 0.000E+00 41 -2.51 2.050E-01 -3.434E+00 3.643E+01 -1.392E+02 0.000E+00 0.000E+00 0.000E+00 42 0.29 -5.088E-02 -1.712E-02 3.607E-01 -6.401E-02 0.000E+00 0.000E+00 0.000E+00 51 -5.17 -7.592E-03 -1.418E-01 1.256E-01 -1.813E-02 -4.216E-03 -7.906E-03 4.420E-03 52 25.33 1.584E-01 -2.299E-01 1.081E-01 -2.064E-02 -1.339E-04 -9.251E-05 0.000E+00

[0096] For the numerical values of the relevant conditional expressions in this specific embodiment, please refer to Table 6.

[0097] For the MTF transfer function curve graph of this specific embodiment, please refer to Figure 2 , for the defocus curve graph, please refer to Figure 3 , it can be seen that the resolution is high, the central MTF value at the spatial frequency of 250 lp / mm is greater than 0.35, the edge MTF value is greater than 0.18, and the imaging quality is good; for the lateral chromatic aberration graph, please refer to Figure 4 , for the spot diagram, please refer to Figure 6 , it can be seen that the chromatic aberration and aberration are better optimized; for the field curvature and distortion graph, please refer to Figure 5 (A) and (B) of , it can be seen that the field curvature and distortion are better corrected, and the overall F-tan(Theta) distortion is less than -54%.

[0098] In the design of this embodiment, temperature compensation is considered. When used in the temperature range of -20°C to 70°C, the picture is clear and there is no defocus.

[0099] In this specific embodiment, the focal length f of the optical imaging lens is 0.8 mm; the aperture value FNO is 3.0; the field of view angle FOV is 154.0°; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 8 on the optical axis I is 9.99 mm.

[0100] Embodiment 2

[0101] As Figure 7 shown, the surface concavity and convexity and refractive index of each lens in this embodiment are the same as those in Embodiment 1, only the optical parameters such as the curvature radius and lens thickness of each lens surface are different.

[0102] The detailed optical data of this specific embodiment is shown in Table 2-1.

[0103] Table 2-1 Detailed Optical Data of Embodiment 2

[0104]

[0105]

[0106] For the detailed parameter data of each aspheric surface in this specific embodiment, please refer to the following table:

[0107] Surface K <![CDATA[A 4 > <![CDATA[A 6 > <![CDATA[A 8 > <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > 21 -1.72 1.330E-02 -4.590E-03 3.748E-04 -1.572E-05 7.669E-07 0.000E+00 0.000E+00 22 -0.97 2.427E-02 1.055E-02 -2.749E-02 6.119E-03 0.000E+00 0.000E+00 0.000E+00 41 6.52 -4.466E-01 -2.063E+00 -2.714E+00 -1.853E+00 0.000E+00 0.000E+00 0.000E+00 42 0.00 -1.967E-01 5.375E-02 -7.370E-02 3.722E-01 4.452E-01 -7.472E-01 0.000E+00 51 -3.90 -2.633E-01 3.879E-02 -8.113E-01 7.685E-01 6.588E-01 -1.236E+00 0.000E+00 52 46.46 1.762E-01 -3.978E-01 2.400E-01 -6.414E-02 0.000E+00 0.000E+00 0.000E+00

[0108] For the numerical values of the relevant conditional expressions in this specific embodiment, please refer to Table 6.

[0109] For the MTF transfer function curve graph of this specific embodiment, please refer to Figure 8 , and for the defocus curve graph, please refer to Figure 9 . It can be seen that the resolution is high, the central MTF value at a spatial frequency of 250 lp / mm is greater than 0.35, the edge MTF value is greater than 0.18, and the imaging quality is good; for the lateral chromatic aberration graph, please refer to Figure 10 , and for the spot diagram, please refer to Figure 12 . It can be seen that the chromatic aberration and aberration are better optimized; for the field curvature and distortion graph, please refer to Figure 11 (A) and (B), and it can be seen that the field curvature and distortion are better corrected, and the overall F-tan(Theta) distortion is less than -54%.

[0110] In the design of this embodiment, temperature compensation is considered. When used in the temperature range of -20°C to 70°C, the picture is clear and in focus.

[0111] In this specific embodiment, the focal length f of the optical imaging lens is 0.8 mm; the aperture value FNO is 3.0; the field of view angle FOV is 154.0°; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 8 on the optical axis I is 9.99 mm.

[0112] Embodiment III

[0113] As Figure 13 shown, the surface concavity and convexity and refractive index of each lens in this embodiment are the same as those in Embodiment I, and only the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0114] The detailed optical data of this specific embodiment is shown in Table 3-1.

[0115] Table 3-1 Detailed Optical Data of Embodiment III

[0116]

[0117]

[0118] For the detailed parameter data of each aspheric surface in this specific embodiment, please refer to the following table:

[0119] Surface K <![CDATA[A 4 > <![CDATA[A 6 > <![CDATA[A 8 > <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > 21 -1.76 1.325E-02 -4.613E-03 3.727E-04 -1.539E-05 8.502E-07 0.000E+00 0.000E+00 22 -0.97 2.360E-02 1.090E-02 -2.733E-02 6.104E-03 0.000E+00 0.000E+00 0.000E+00 41 6.53 -4.419E-01 -2.227E+00 -3.960E+00 5.850E+00 0.000E+00 0.000E+00 0.000E+00 42 0.00 -1.998E-01 5.350E-02 -7.540E-02 3.684E-01 4.452E-01 -7.275E-01 0.000E+00 51 -3.89 -2.648E-01 3.654E-02 -8.171E-01 7.685E-01 6.599E-01 -1.235E+00 0.000E+00 52 45.44 1.787E-01 -4.003E-01 2.398E-01 -6.325E-02 0.000E+00 0.000E+00 0.000E+00

[0120] For the numerical values of the relevant conditional expressions in this specific embodiment, please refer to Table 6.

[0121] For the MTF transfer function curve diagram of this specific embodiment, please refer to Figure 14 , and for the defocus curve diagram, please refer to Figure 15 . It can be seen that the resolution is high, the central MTF value at a spatial frequency of 250 lp / mm is greater than 0.35, the edge MTF value is greater than 0.18, and the imaging quality is good; for the lateral chromatic aberration diagram, please refer to Figure 16 , and for the spot diagram, please refer to Figure 18 . It can be seen that the chromatic aberration and spherical aberration are well optimized; for the field curvature and distortion diagram, please refer to Figure 17 (A) and (B) of . It can be seen that the field curvature and distortion are well corrected, and the overall F-tan(Theta) distortion is less than -54%.

[0122] In the design of this embodiment, temperature compensation is considered. When used in the temperature range of -20°C to 70°C, the picture is clear and there is no defocus.

[0123] In this specific embodiment, the focal length f of the optical imaging lens is 0.8 mm; the aperture value FNO is 3.0; the field of view angle FOV is 154.0°; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 8 on the optical axis I is 9.99 mm.

[0124] Embodiment Four

[0125] As Figure 19 shown, the surface concavity and convexity and refractive index of each lens in this embodiment are the same as those in Embodiment One, and only the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0126] The detailed optical data of this specific embodiment are shown in Table 4-1.

[0127] Table 4-1 Detailed Optical Data of Embodiment Four

[0128]

[0129]

[0130] For the detailed data of the parameters of each aspheric surface in this specific embodiment, please refer to the following table:

[0131] Surface K <![CDATA[A 4 > <![CDATA[A 6 > <![CDATA[A 8 > <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > 21 -3.23 1.266E-02 -4.666E-03 3.967E-04 -7.923E-06 6.996E-08 0.000E+00 0.000E+00 22 -0.99 1.572E-02 1.553E-02 -2.719E-02 6.131E-03 0.000E+00 0.000E+00 0.000E+00 41 5.99 -4.475E-01 -1.874E+00 8.133E+00 -4.819E+01 0.000E+00 0.000E+00 0.000E+00 42 0.00 -1.290E-01 -2.626E-03 -3.157E-02 3.751E-01 3.740E-01 -7.067E-01 0.000E+00 51 0.88 -2.409E-01 9.045E-02 -8.540E-01 6.615E-01 7.765E-01 -1.065E+00 0.000E+00 52 46.46 1.937E-01 -4.060E-01 2.364E-01 -5.896E-02 0.000E+00 0.000E+00 0.000E+00

[0132] For the numerical values of the relevant conditional expressions in this specific embodiment, please refer to Table 6.

[0133] For the MTF transfer function curve diagram of this specific embodiment, please refer to Figure 20 , and for the defocus curve diagram, please refer to Figure 21 . It can be seen that the resolution is high, the central MTF value at a spatial frequency of 250 lp / mm is greater than 0.35, the edge MTF value is greater than 0.18, and the imaging quality is good; for the lateral chromatic aberration diagram, please refer toFigure 22 , see the spot diagram in Figure 24 , it can be seen that the color difference and aberration are well optimized; for the field curvature and distortion diagrams, please refer to Figure 23 (A) and (B) of , it can be seen that the field curvature and distortion are well corrected, and the overall F-tan(Theta) distortion is less than -54%.

[0134] In this embodiment, temperature compensation is considered in the design. When used in the temperature range of -20°C to 70°C, the picture is clear and there is no defocus.

[0135] In this specific embodiment, the focal length f of the optical imaging lens is 0.8 mm; the aperture value FNO is 3.0; the field of view angle FOV is 154.0°; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 8 on the optical axis I is 9.99 mm.

[0136] Embodiment Five

[0137] As Figure 25 shown, the surface concavity and convexity and refractive index of each lens in this embodiment are roughly the same as those in Embodiment One. Only the fifth lens 5 has a negative refractive index. In addition, the optical parameters such as the radius of curvature of each lens surface and the lens thickness are also different.

[0138] The detailed optical data of this specific embodiment are shown in Table 5-1.

[0139] Table 5-1 Detailed Optical Data of Embodiment Five

[0140]

[0141]

[0142] For the detailed data of the parameters of each aspherical surface in this specific embodiment, please refer to the following table:

[0143] Surface K <![CDATA[A 4 > <![CDATA[A 6 > <![CDATA[A 8 > <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > 21 0.00 1.274E-02 -2.834E-03 1.338E-04 1.290E-07 0.000E+00 0.000E+00 0.000E+00 22 -0.71 -2.479E-02 1.842E-02 -1.539E-02 -3.844E-04 0.000E+00 0.000E+00 0.000E+00 41 -2.24 -6.047E-02 1.569E-01 -2.757E-01 2.449E+00 0.000E+00 0.000E+00 0.000E+00 42 0.00 2.865E-01 -7.876E-01 1.483E+00 -9.063E-01 2.789E-01 -7.325E-02 0.000E+00 51 30.04 1.262E-02 -5.393E-01 5.179E-01 -1.777E-01 6.444E-02 -8.117E-02 0.000E+00 52 3.37 -2.264E-02 -1.876E-01 1.267E-01 -3.462E-02 0.000E+00 0.000E+00 0.000E+00

[0144] For the numerical values of the relevant conditional expressions in this specific embodiment, please refer to Table 6.

[0145] For the MTF transfer function curve diagram of this specific embodiment, please see Figure 26 , for the defocus curve diagram, please see Figure 27 , it can be seen that the resolution is high, the central MTF value at a spatial frequency of 250 lp / mm is greater than 0.35, the edge MTF value is greater than 0.18, and the imaging quality is good; for the lateral color difference diagram, please see Figure 28 , for the spot diagram, please see Figure 30 , it can be seen that the color difference and aberration are well optimized; for the field curvature and distortion diagrams, please refer to Figure 29 (A) and (B) of , it can be seen that the field curvature and distortion are well corrected, and the overall F-tan(Theta) distortion is less than -54%.

[0146] This embodiment takes temperature compensation into consideration in the design. When used in the temperature range of -20°C to 70°C, the picture is clear and in focus.

[0147] In this specific embodiment, the focal length f of the optical imaging lens is 0.8 mm; the aperture value FNO is 3.0; the field of view FOV is 154.0°; the distance TTL from the object side 11 of the first lens 1 to the imaging surface 8 on the optical axis I is 9.99 mm.

[0148] Table 6 Numerical values of relevant important parameters of five embodiments of the present invention

[0149]

[0150]

[0151] Although the present invention has been specifically shown and described in connection with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in form and detail without departing from the spirit and scope of the present invention defined by the appended claims, and all such changes are within the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: It successively includes a first lens to a fifth lens along an optical axis from the object side to the image side; the first lens to the fifth lens each include an object side facing the object side and allowing imaging light to pass through and an image side facing the image side and allowing imaging light to pass through; The first lens has a negative refractive power, the object side of the first lens is convex, and the image side of the first lens is concave; The second lens has a negative refractive power, the object side of the second lens is convex, and the image side of the second lens is concave; The third lens has a positive refractive power, the object side of the third lens is convex, and the image side of the third lens is concave; The fourth lens has a positive refractive power, the object side of the fourth lens is convex, and the image side of the fourth lens is convex; The object side of the fifth lens is convex, and the image side of the fifth lens is concave; Both the first lens and the third lens are made of glass materials, the second lens, the fourth lens and the fifth lens are all made of plastic materials, and the object sides and image sides of the second lens, the fourth lens and the fifth lens are all aspherical surfaces; The lenses with refractive power in this optical imaging lens are only the above-mentioned first lens to the fifth lens; This optical imaging lens also satisfies: -7.5mm < f1 < -5mm, -2.5mm < f2 < -1.5mm, 4.5mm < f3 < 5.7mm, 1.4mm < f4 < 2mm, -7mm < f5 < 9mm, where f1, f2, f3, f4 and f5 are the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens respectively.

2. The optical imaging lens according to claim 1, wherein: The refractive index temperature coefficient of the fourth lens is negative.

3. The optical imaging lens according to claim 1, wherein: The object sides and image sides of the second lens, the fourth lens and the fifth lens are all high-order even aspherical surfaces.

4. The optical imaging lens according to claim 1, wherein: It also includes a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.

5. The optical imaging lens according to claim 1, wherein: This optical imaging lens also satisfies: D11 / R11 ≤ 1.2, 1 ≤ D12 / R12 ≤ 1.83, D21 / R21 ≤ 1.2, D31 / R31 ≤ 1.6, D32 / R32 ≤ 1.0, D41 / R41 ≤ 1.0, 0.7 ≤ ∣D42 / R42∣ ≤ 1.8, 0.2 ≤ D51 / R51 ≤ 1.5, D52 / R52 ≤ 1.0, where D11, D12, D21, D31, D32, D41, D42, D51 and D52 are the diameters of the object side of the first lens, the image side of the first lens, the object side of the second lens, the object side of the third lens, the image side of the third lens, the object side of the fourth lens, the image side of the fourth lens, the object side of the fifth lens and the image side of the fifth lens respectively, and R11, R12, R21, R31, R32, R41, R42, R51 and R52 are the curvature radii of the object side of the first lens, the image side of the first lens, the object side of the second lens, the object side of the third lens, the image side of the third lens, the object side of the fourth lens, the image side of the fourth lens, the object side of the fifth lens and the image side of the fifth lens respectively.

6. The optical imaging lens according to claim 1, wherein: The third lens is made of H-ZF88 material.

7. The optical imaging lens according to claim 1, wherein: This optical imaging lens also satisfies: TTL ≤ 10.00mm, where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis.

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