Optical lens

Abstract

This application discloses an optical lens that, along the optical axis from the object side to the image side, sequentially includes a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with negative optical power, a ninth lens with positive optical power, and a tenth lens with negative optical power; wherein the optical lens has ten lenses with optical power.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical devices, in particular to a ten-piece optical lens. BACKGROUND

[0002] In recent years, with the continuous progress of science and technology, optical lenses are widely used in distance education, network live broadcast, video conference and other aspects, and higher requirements are put forward for the imaging quality of optical lenses.

[0003] However, there are some problems with existing optical lenses. For example, the target surface of the optical lens is small; or the color restoration and image contrast of the optical lens are poor; or the distortion of the optical lens is large and cannot truly restore the scene; or the total optical length of the optical lens is too long and the volume is large; or the field of view of the optical lens is small and cannot obtain rich image information. SUMMARY

[0004] The present application provides an optical lens that can at least solve or partially solve at least one problem or other problem existing in the prior art.

[0005] One aspect of the present application provides an optical lens comprising, in order from the object side to the image side along the optical axis, a first lens having a negative optical power, a second lens having a negative optical power, a third lens having a positive optical power, a fourth lens having a negative optical power, a fifth lens having a positive optical power, a sixth lens having a positive optical power, a seventh lens having a negative optical power, an eighth lens having a negative optical power, a ninth lens having a positive optical power, and a tenth lens having a negative optical power. Wherein the number of lenses with optical power of the optical lens is ten.

[0006] According to an exemplary embodiment of the present application, the object side surface of the first lens is convex, and the image side surface is concave. The object side surface of the second lens is convex, and the image side surface is concave. The object side surface of the third lens is convex, and the image side surface is convex. The object side surface of the fourth lens is concave, and the image side surface is convex. The object side surface of the fifth lens is convex, and the image side surface is convex. The object side surface of the sixth lens is convex, and the image side surface is convex. The object side surface of the seventh lens is convex, and the image side surface is concave. The object side surface of the eighth lens is concave, and the image side surface is concave. The object side surface of the ninth lens is convex, and the image side surface is concave. The object side surface of the tenth lens is convex, and the image side surface is concave.

[0007] According to an exemplary embodiment of the present application, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -6.0≤F1 / F≤-4.5.

[0008] According to an exemplary embodiment of the present application, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -3.52≤F2 / F≤-3.05.

[0009] According to an example embodiment of the present application, the radius of curvature R31 of the object side surface of the third lens, the radius of curvature R32 of the image side surface of the third lens, and the total effective focal length F of the optical lens satisfy: -3.4≤F / (R31+R32)≤7.53.

[0010] According to an example embodiment of the present application, the radius of curvature R41 of the object side surface of the fourth lens, the radius of curvature R42 of the image side surface of the fourth lens, and the total effective focal length F of the optical lens satisfy: -0.15≤F / (R41+R42)≤0.

[0011] According to an example embodiment of the present application, the Abbe number V5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 11.45≤V5 / F≤11.92; and the Abbe number V6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 11.45≤V6 / F≤11.92.

[0012] According to an example embodiment of the present application, the total track length TTL of the optical lens and the total effective focal length F of the optical lens satisfy: 5.16≤TTL / F≤5.89.

[0013] According to an example embodiment of the present application, the back focal length BFL of the optical lens and the total effective focal length F of the optical lens satisfy: 0.236≤BFL / F≤0.287.

[0014] According to an example embodiment of the present application, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -4.96≤F8 / F≤-2.98.

[0015] According to an example embodiment of the present application, the effective focal length F9 of the ninth lens and the total effective focal length F of the optical lens satisfy: 6.98≤F9 / F≤11.45.

[0016] According to an example embodiment of the present application, the maximum optical half aperture D7 of the seventh lens and the effective focal length F7 of the seventh lens satisfy: -0.423≤D7 / F7≤-0.345.

[0017] According to an example embodiment of the present application, the maximum optical half aperture D8 of the eighth lens and the effective focal length F8 of the eighth lens satisfy: -0.435≤D8 / F8≤-0.213.

[0018] According to an example embodiment of the present application, the maximum optical half aperture D9 of the ninth lens and the effective focal length F9 of the ninth lens satisfy: 0.121≤D9 / F9≤0.257.

[0019] According to an exemplary embodiment of this application, the maximum optical half-aperture D10 of the tenth lens and the effective focal length F10 of the tenth lens satisfy: -0.532≤D10 / F10≤-0.133.

[0020] According to an exemplary embodiment of this application, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens satisfy: -0.42≤F3 / F4≤-0.17.

[0021] According to an exemplary embodiment of this application, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the effective focal length F7 of the seventh lens, the effective focal length F8 of the eighth lens, the effective focal length F9 of the ninth lens, and the effective focal length F10 of the tenth lens satisfy: 0.97≤(F3+F4) / (F7+F8+F9+F10)≤2.15.

[0022] This application uses ten lenses. By rationally allocating the optical power of each lens, the optical lens can achieve at least one of the following beneficial effects: miniaturization, large target surface, large field of view, high resolution, low distortion, and low cost. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0025] Figure 2 The distortion curve of the optical lens according to Embodiment 1 of this application is shown;

[0026] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0027] Figure 4 The distortion curve of the optical lens according to Embodiment 2 of this application is shown;

[0028] Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0029] Figure 6 The distortion curve of the optical lens according to Embodiment 3 of this application is shown;

[0030] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown; and

[0031] Figure 8 The distortion curve of the optical lens according to Embodiment 4 of this application is shown. Detailed Implementation

[0032] To better understand this application, various aspects of this application will be described in detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of this application and are not intended to limit the scope of this application in any way.

[0033] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0034] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0035] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprises" as used in this specification indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. It should be noted that in this specification, the expressions "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features.

[0036] Unless otherwise specified, all terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly stated herein.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] An optical lens according to an exemplary embodiment of this application may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, and these ten lenses are arranged sequentially along the optical axis from the object side to the image side. The optical lens has ten lenses with optical power.

[0039] In an exemplary embodiment, the first lens may have a negative optical power. Designing the first lens as a negative lens allows for the convergence of as much incident light as possible into the optical system, which is beneficial for improving the field of view (FOV) of the optical lens. The maximum FOV of the optical lens can satisfy: FOV ≥ 104°. In one example, the object-side surface of the first lens may be convex, and the image-side surface may be concave.

[0040] In an exemplary embodiment, the second lens may have negative optical power. Designing the second lens as a negative lens effectively controls the trajectory of incident light within the optical system, reduces the tolerance sensitivity of the optical lens, and improves the yield of the optical lens. In one example, the object-side surface of the second lens may be convex, and the image-side surface may be concave.

[0041] In an exemplary embodiment, the third lens may have positive optical power. Designing the third lens as a positive lens is beneficial for correcting various aberrations of the optical lens and improving its resolving power. In one example, both the object-side and image-side surfaces of the third lens may be convex.

[0042] In an exemplary embodiment, the fourth lens may have negative optical power. Designing the fourth lens as a negative lens helps correct distortion in the optical lens and improves the realism of the scene reproduction. The absolute value of the optical distortion of the optical lens can be less than 10%. In one example, the object-side surface of the fourth lens may be concave, and the image-side surface may be convex.

[0043] In an exemplary embodiment, the fifth lens may have positive optical power. Designing the fifth lens as a positive lens effectively reduces chromatic aberration, improves purple fringing, and balances the high and low temperature performance of the optical lens. In one example, the object-side surface of the fifth lens may be convex, and the image-side surface may also be convex.

[0044] In an exemplary embodiment, the sixth lens may have positive optical power. Designing the sixth lens as a positive lens effectively reduces chromatic aberration and improves purple fringing. In one example, the object-side surface of the sixth lens may be convex, and the image-side surface may also be convex.

[0045] In an exemplary embodiment, the seventh lens may have negative optical power. Designing the seventh lens as a negative lens is beneficial for correcting astigmatism and field curvature of the optical lens, and improving the image uniformity of the optical lens. In one example, the object-side surface of the seventh lens may be convex, and the image-side surface may be concave.

[0046] In an exemplary embodiment, the eighth lens may have negative optical power. Designed as a negative lens, the eighth lens, used in conjunction with the ninth and tenth lenses, effectively constrains the projection height of subsequent light rays, achieving a large target area for the optical lens and ensuring that the chief ray angle (CRA) of the optical lens matches the CRA of the chip. In one example, the object-side surface of the eighth lens may be concave, and the image-side surface may also be concave.

[0047] In an exemplary embodiment, the ninth lens may have positive optical power. Designed as a positive lens, the ninth lens, used in conjunction with the eighth and tenth lenses, effectively constrains the projection height of subsequent light rays, achieving a large target area for the optical lens and ensuring that the CRA of the optical lens matches the CRA of the chip. In one example, the object-side surface of the ninth lens may be convex, and the image-side surface may be concave.

[0048] In an exemplary embodiment, the tenth lens may have negative optical power. Designing the tenth lens as a negative lens effectively corrects the field curvature of the optical lens and ensures that the CRA of the optical lens matches the CRA of the chip, thereby improving the illumination of the optical lens. In one example, the object-side surface of the tenth lens may be convex, and the image-side surface may be concave.

[0049] In an exemplary embodiment, any one of the third to tenth lenses can be an aspherical lens. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0050] In an exemplary embodiment, the first lens or the second lens may be a spherical lens.

[0051] In an exemplary embodiment, the first, second, fifth, and sixth lenses can be glass lenses, while the third, fourth, seventh, eighth, ninth, and tenth lenses can be plastic lenses. Using a hybrid of glass and plastic lenses helps reduce the cost of the optical lens and also facilitates a balance in its high and low temperature performance, ensuring good image quality without defocusing within a temperature range of -30℃ to +70℃. Using glass lenses also helps correct chromatic aberration and improves color saturation.

[0052] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the fifth lens and the sixth lens. By disposing an aperture stop between the fifth lens and the sixth lens, the light throughput of the optical lens can be effectively controlled, thereby improving the imaging quality of the optical lens.

[0053] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -6.0 ≤ F1 / F ≤ -4.5. By appropriately configuring the effective focal length of the first lens, sufficient refractive power can be provided to the optical system while enabling the optical lens to achieve a large field of view. The maximum field of view (FOV) of the optical lens can satisfy: FOV ≥ 104°.

[0054] In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: -3.52 ≤ F2 / F ≤ -3.05. Properly configuring the effective focal length of the second lens allows large-angle light rays to enter the optical system, which is beneficial for improving the field of view of the optical lens. The maximum field of view (FOV) of the optical lens can satisfy: FOV ≥ 104°.

[0055] In an exemplary embodiment, the radius of curvature R31 of the object-side surface of the third lens, the radius of curvature R32 of the image-side surface of the third lens, and the total effective focal length F of the optical lens can satisfy: -3.4 ≤ F / (R31+R32) ≤ 7.53. The third lens is an aspherical lens made of plastic, and the ratio of the total effective focal length of the optical lens to the sum of the radii of curvature of the object-side and image-side surfaces of the third lens is reasonably configured. This helps to constrain the direction of light rays, reduce the deflection angle of light rays, effectively correct various aberrations of the optical lens, and improve the resolving power of the optical lens. The resolving power of the optical lens can reach 5MP.

[0056] In an exemplary embodiment, the radius of curvature R41 of the object-side surface of the fourth lens, the radius of curvature R42 of the image-side surface of the fourth lens, and the total effective focal length F of the optical lens can satisfy: -0.15 ≤ F / (R41+R42) ≤ 0. The fourth lens is an aspherical lens made of plastic, and the reasonable configuration of the ratio of the total effective focal length of the optical lens to the sum of the radii of curvature of the object-side and image-side surfaces of the fourth lens helps to constrain the direction of light, reduce the deflection angle of light, effectively correct various aberrations of the optical lens, and improve the resolving power of the optical lens. The resolving power of the optical lens can reach 5MP.

[0057] In an exemplary embodiment, the Abbe number V5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: 11.45 ≤ V5 / F ≤ 11.92; and the Abbe number V6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: 11.45 ≤ V6 / F ≤ 11.92. The fifth and sixth lenses are made of aspherical glass, and the appropriate configuration of their Abbe numbers helps to reduce chromatic aberration in the optical lens, ensuring good color reproduction.

[0058] In an exemplary embodiment, the total optical length (TTL) and the total effective focal length (F) of the optical lens can satisfy: 5.16 ≤ TTL / F ≤ 5.89. By rationally configuring the ratio of the total optical length to the total effective focal length of the optical lens, a smaller total optical length can be achieved for a given total effective focal length, thus enabling miniaturization of the optical lens. The total optical length (TTL) of the optical lens can satisfy: TTL ≤ 40mm.

[0059] In an exemplary embodiment, the back focal length BFL of the optical lens and the total effective focal length F of the optical lens can satisfy: 0.236 ≤ BFL / F ≤ 0.287. Reasonably configuring the ratio of the back focal length to the total effective focal length of the optical lens can constrain the back focal length within an appropriate range, improve the assembly yield of the optical lens, and also facilitate reserving space for the installation of other optical components, increasing the design flexibility of the optical lens.

[0060] In an exemplary embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens can satisfy: -4.96 ≤ F8 / F ≤ -2.98. By rationally configuring the ratio of the effective focal length of the eighth lens to the total effective focal length of the optical lens, the effective focal length of the eighth lens can be constrained within an appropriate range. When used in conjunction with a ninth lens having positive optical power, it can effectively control the direction of light, elevate the light beam, and achieve a large target surface for the optical lens. The optical lens can be adapted to 1 / 1" sized chips.

[0061] In an exemplary embodiment, the effective focal length F9 of the ninth lens and the total effective focal length F of the optical lens can satisfy: 6.98 ≤ F9 / F ≤ 11.45. By rationally configuring the ratio of the effective focal length of the ninth lens to the total effective focal length of the optical lens, the effective focal length of the ninth lens can be constrained within an appropriate range. When used in conjunction with the eighth lens, which has negative optical power, it can effectively control the direction of light, elevate the light beam, and achieve a large target surface for the optical lens. The optical lens can be adapted to 1 / 1" sized chips.

[0062] In an exemplary embodiment, the maximum optical half-aperture D7 of the seventh lens and the effective focal length F7 of the seventh lens can satisfy: -0.423 ≤ D7 / F7 ≤ -0.345. By appropriately configuring the ratio of the maximum optical half-aperture to the effective focal length of the seventh lens, the CRA of the optical lens can be matched with the CRA of the chip. For example, the difference between the CRA of the optical lens and the chip can be within ±3°, reducing peripheral light loss and improving the resolution of the optical lens.

[0063] In an exemplary embodiment, the maximum optical half-aperture D8 of the eighth lens and the effective focal length F8 of the eighth lens can satisfy: -0.435≤D8 / F8≤-0.213. By appropriately configuring the ratio of the maximum optical half-aperture to the effective focal length of the eighth lens, the CRA of the optical lens can be matched with the CRA of the chip. For example, the difference between the CRA of the optical lens and the chip can be within ±3°, reducing peripheral light loss and improving the resolution of the optical lens.

[0064] In an exemplary embodiment, the maximum optical half-aperture D9 of the ninth lens and the effective focal length F9 of the ninth lens can satisfy: 0.121≤D9 / F9≤0.257. By appropriately configuring the ratio of the maximum optical half-aperture to the effective focal length of the ninth lens, the CRA of the optical lens can be matched with the CRA of the chip. For example, the difference between the CRA of the optical lens and the chip can be within ±3°, reducing peripheral light loss and improving the resolution of the optical lens.

[0065] In an exemplary embodiment, the maximum optical half-aperture D10 of the tenth lens and the effective focal length F10 of the tenth lens can satisfy: -0.532 ≤ D10 / F10 ≤ -0.133. By appropriately configuring the ratio of the maximum optical half-aperture to the effective focal length of the tenth lens, the CRA of the optical lens can be matched with the CRA of the chip. For example, the difference between the CRA of the optical lens and the chip can be within ±3°, reducing peripheral light loss and improving the resolution of the optical lens.

[0066] In an exemplary embodiment, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens can satisfy: -0.42 ≤ F3 / F4 ≤ -0.17. By rationally configuring the ratio of the effective focal length of the third lens to that of the fourth lens, the direction of light can be effectively controlled, the deflection angle of light can be reduced, the sensitivity of the optical lens can be decreased, and the yield of the optical lens can be improved.

[0067] In an exemplary embodiment, the effective focal lengths F3 of the third lens, F4 of the fourth lens, F7 of the seventh lens, F8 of the eighth lens, F9 of the ninth lens, and F10 of the tenth lens can satisfy: 0.97 ≤ (F3 + F4) / (F7 + F8 + F9 + F10) ≤ 2.15. Properly configuring the effective focal lengths of the plastic lenses before and after the aperture stop can effectively correct the field curvature of the optical lens, improve the edge resolution of the optical lens, and compensate for the adverse effects of high and low temperature environments, thus achieving a heat-free optical lens.

[0068] In an exemplary embodiment, the imaging target area of ​​the optical lens can reach 1 / 1", which is beneficial for the optical lens to achieve the characteristic of a large target area.

[0069] In an exemplary embodiment, the absolute value of the optical distortion of the optical lens can be less than 10%, which is beneficial for the optical lens to achieve low distortion characteristics.

[0070] The optical lens according to the above embodiments of this application can use multiple lenses, such as the ten lenses mentioned above. By reasonably allocating the optical parameters such as the optical power, surface shape, and center thickness of each lens, at least one of the following can be achieved: miniaturization, large target surface, large field of view, high resolution, low distortion, and low cost of the optical lens. In addition, the optical lens has good color reproduction and does not have defocus in the temperature range of -30℃ to +70℃.

[0071] Those skilled in the art should understand that the total optical length (TTL) of the optical lens used above refers to the axial distance from the object-side surface of the first lens to the image plane. The back focal length (BFL) of the optical lens refers to the axial distance from the image-side surface of the tenth lens to the image plane. The maximum optical half-aperture of any of the seventh to tenth lenses refers to the maximum value of the half-aperture of the object-side surface and the half-aperture of the image-side surface of that lens.

[0072] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification.

[0073] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0074] Example 1

[0075] The following is for reference Figure 1 An optical lens according to Embodiment 1 of this application is described.

[0076] like Figure 1As shown, the optical lens, along the optical axis from the object side to the imaging plane IMA, includes, in sequence, 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, a ninth lens L9, and a tenth lens L10. An aperture stop (STOP) is provided between the fifth lens L5 and the sixth lens L6.

[0077] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0078] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0079] The third lens L3 has positive optical power, and its object side S5 is convex, while its image side S6 is convex.

[0080] The fourth lens L4 has negative optical power, with its object side S7 being concave and its image side S8 being convex.

[0081] The fifth lens L5 has positive optical power, and its object side S9 is convex, and its image side S10 is convex.

[0082] The sixth lens L6 has positive optical power, and its object side S11 is convex, and its image side S12 is convex.

[0083] The seventh lens L7 has negative optical power, with its object side S13 being convex and its image side S14 being concave.

[0084] The eighth lens L8 has negative optical power, and its object side S15 is concave, and its image side S16 is concave.

[0085] The ninth lens L9 has positive optical power, with its object side S17 being convex and its image side S18 being concave.

[0086] The tenth lens L10 has negative optical power, with its object side S19 being convex and its image side S20 being concave.

[0087] A filter CG can also be disposed between the tenth lens L10 and the imaging plane IMA. The filter CG has an object-side surface S21 and an image-side surface S22. Light from the object passes sequentially through each surface S1 to S22 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S22 are... Figure 1 Not shown in the image.

[0088] Table 1 shows the basic parameters of the optical lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0089]

[0090] Table 1

[0091] In this embodiment, the aperture number (FNO) of the optical lens is 2.2. The optical distortion of the optical lens is -9.20%. The maximum field of view (FOV) of the optical lens is 104.59°.

[0092] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the third lens E3 to the tenth lens E10, are aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0093]

[0094] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical 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 i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10 that can be used for each aspherical surface S5-S20 in Example 1. 10 A 12 A 14 and A 16 .

[0095] Face number k A4 A6 A8 A10 A12 A14 A16 S5 -50.57 -9.87E-05 1.62E-06 8.81E-09 0.00 0.00 0.00 0.00 S6 12.15 -4.11E-04 5.42E-06 -1.31E-08 0.00 0.00 0.00 0.00 S7 54.68 -1.69E-04 -5.14E-06 9.47E-08 0.00 0.00 0.00 0.00 S8 -99.00 -1.08E-04 -3.24E-06 7.98E-08 0.00 0.00 0.00 0.00 S9 -3.67 -4.94E-05 -3.84E-06 -1.53E-08 0.00 0.00 0.00 0.00 S10 5.10 -2.77E-04 4.01E-06 -4.49E-08 0.00 0.00 0.00 0.00 S11 -6.55 -1.01E-03 -2.40E-05 -3.38E-06 0.00 0.00 0.00 0.00 S12 -3.47 -1.42E-03 -2.75E-05 -1.60E-06 0.00 0.00 0.00 0.00 S13 -7.29 -1.14E-03 8.82E-06 -1.29E-06 5.92E-08 0.00 0.00 0.00 S14 -2.05 -1.00E-03 3.57E-05 -1.66E-06 0.00 0.00 0.00 0.00 S15 85.80 -1.32E-03 -1.29E-04 7.40E-06 0.00 0.00 0.00 0.00 S16 15.85 -2.52E-03 -1.40E-05 2.39E-06 0.00 0.00 0.00 0.00 S17 -35.92 -1.62E-03 1.06E-04 -2.15E-06 0.00 0.00 0.00 0.00 S18 -99.00 -2.29E-03 1.25E-04 -2.13E-06 0.00 0.00 0.00 0.00 S19 -24.10 -2.88E-03 3.05E-05 -2.45E-07 0.00 0.00 0.00 0.00 S20 -11.69 -1.38E-03 2.51E-05 -3.52E-07 0.00 0.00 0.00 0.00

[0096] Table 2

[0097] Figure 2 The distortion curve of the optical lens in Example 1 represents the distortion magnitude corresponding to different image heights. According to... Figure 2 It can be seen that the optical lens of Example 1 has a small distortion value and can achieve good imaging quality.

[0098] Example 2

[0099] The following is for reference Figure 3 The optical lens according to Embodiment 2 of this application is described.

[0100] like Figure 3 As shown, the optical lens, along the optical axis from the object side to the imaging plane IMA, includes, in sequence, 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, a ninth lens L9, and a tenth lens L10. An aperture stop (STOP) is provided between the fifth lens L5 and the sixth lens L6.

[0101] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0102] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0103] The third lens L3 has positive optical power, and its object side S5 is convex, while its image side S6 is convex.

[0104] The fourth lens L4 has negative optical power, with its object side S7 being concave and its image side S8 being convex.

[0105] The fifth lens L5 has positive optical power, and its object side S9 is convex, and its image side S10 is convex.

[0106] The sixth lens L6 has positive optical power, and its object side S11 is convex, and its image side S12 is convex.

[0107] The seventh lens L7 has negative optical power, with its object side S13 being convex and its image side S14 being concave.

[0108] The eighth lens L8 has negative optical power, and its object side S15 is concave, and its image side S16 is concave.

[0109] The ninth lens L9 has positive optical power, with its object side S17 being convex and its image side S18 being concave.

[0110] The tenth lens L10 has negative optical power, with its object side S19 being convex and its image side S20 being concave.

[0111] A filter CG can also be disposed between the tenth lens L10 and the imaging plane IMA. The filter CG has an object-side surface S21 and an image-side surface S22. Light from the object passes sequentially through each surface S1 to S22 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S22 are... Figure 3 Not shown in the image.

[0112] Table 3 shows the basic parameters of the optical lens of Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0113]

[0114] Table 3

[0115] In this embodiment, the aperture number (FNO) of the optical lens is 2.2. The optical distortion of the optical lens is -8.50%. The maximum field of view (FOV) of the optical lens is 104.48°.

[0116] In this embodiment, the object-side surface and image-side surface of any one of the lenses from the third lens E3 to the tenth lens E10 are aspherical. Table 4 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical surface S5-S20 in Embodiment 2.10 A 12 A 14 and A 16 .

[0117]

[0118]

[0119] Table 4

[0120] Figure 4 This is the distortion curve of the optical lens in Example 2, which represents the distortion magnitude corresponding to different image heights. According to... Figure 4 It can be seen that the optical lens of Example 2 has a small distortion value and can achieve good imaging quality.

[0121] Example 3

[0122] The following is for reference Figure 5 The optical lens according to Embodiment 3 of this application is described.

[0123] like Figure 5 As shown, the optical lens, along the optical axis from the object side to the imaging plane IMA, includes, in sequence, 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, a ninth lens L9, and a tenth lens L10. An aperture stop (STOP) is provided between the fifth lens L5 and the sixth lens L6.

[0124] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0125] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0126] The third lens L3 has positive optical power, and its object side S5 is convex, while its image side S6 is convex.

[0127] The fourth lens L4 has negative optical power, with its object side S7 being concave and its image side S8 being convex.

[0128] The fifth lens L5 has positive optical power, and its object side S9 is convex, and its image side S10 is convex.

[0129] The sixth lens L6 has positive optical power, and its object side S11 is convex, and its image side S12 is convex.

[0130] The seventh lens L7 has negative optical power, with its object side S13 being convex and its image side S14 being concave.

[0131] The eighth lens L8 has negative optical power, and its object side S15 is concave, and its image side S16 is concave.

[0132] The ninth lens L9 has positive optical power, with its object side S17 being convex and its image side S18 being concave.

[0133] The tenth lens L10 has negative optical power, with its object side S19 being convex and its image side S20 being concave.

[0134] A filter CG can also be disposed between the tenth lens L10 and the imaging plane IMA. The filter CG has an object-side surface S21 and an image-side surface S22. Light from the object passes sequentially through each surface S1 to S22 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S22 are... Figure 5 Not shown in the image.

[0135] Table 5 shows the basic parameters of the optical lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0136]

[0137]

[0138] Table 5

[0139] In this embodiment, the aperture number (FNO) of the optical lens is 2.2. The optical distortion of the optical lens is -9.50%. The maximum field of view (FOV) of the optical lens is 104.58°.

[0140] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the third lens E3 to the tenth lens E10, are aspherical. Table 6 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical surface S5-S20 in Embodiment 3. 10 A 12 A 14 and A 16 .

[0141] Face number k A4 A6 A8 A10 A12 A14 A16 S5 -11.28 -1.53E-04 2.13E-06 5.40E-09 -5.00E-12 -1.81E-13 0.00 0.00 S6 12.27 -3.94E-04 4.92E-06 -5.74E-09 4.87E-11 1.70E-13 0.00 0.00 S7 50.57 -1.57E-04 -4.98E-06 9.55E-08 5.95E-11 5.50E-13 0.00 0.00 S8 -98.16 -1.03E-04 -2.69E-06 6.91E-08 -3.65E-12 -5.93E-13 0.00 0.00 S9 -3.15 7.98E-05 -1.04E-06 -4.28E-09 6.05E-10 1.18E-11 0.00 0.00 S10 -1.29 -1.85E-04 4.05E-06 -1.34E-08 -4.83E-10 1.13E-11 0.00 0.00 S11 -9.89 -8.37E-04 -2.15E-05 -4.87E-06 1.23E-08 9.02E-09 0.00 0.00 S12 -1.55 -1.30E-03 -7.42E-05 1.28E-06 6.77E-08 -2.30E-09 0.00 0.00 S13 -10.28 -1.63E-03 2.82E-06 1.39E-06 1.65E-07 -4.87E-09 -8.54E-11 0.00 S14 -3.46 -4.14E-04 1.63E-05 8.56E-07 -5.52E-09 5.34E-10 8.36E-12 0.00 S15 -56.20 -1.30E-03 -1.32E-04 5.97E-06 3.62E-09 3.10E-09 3.06E-11 0.00 S16 24.59 -2.12E-03 -3.34E-05 2.96E-06 1.96E-09 -3.32E-10 -2.50E-12 0.00 S17 -26.50 -1.06E-03 8.19E-05 -1.82E-06 1.17E-10 3.64E-11 0.00 0.00 S18 -99.00 -1.38E-03 8.85E-05 -1.66E-06 4.40E-10 7.61E-12 0.00 0.00 S19 -15.74 -2.68E-03 3.52E-05 -4.04E-07 4.35E-10 -2.05E-11 0.00 0.00 S20 -7.21 -1.52E-03 2.95E-05 -3.94E-07 5.26E-11 -5.94E-13 0.00 0.00

[0142] Table 6

[0143] Figure 6 The distortion curve of the optical lens in Example 3 represents the distortion magnitude corresponding to different image heights. According to... Figure 6 It can be seen that the optical lens of Example 3 has a small distortion value and can achieve good imaging quality.

[0144] Example 4

[0145] The following is for referenceFigure 7 The optical lens according to Embodiment 4 of this application is described.

[0146] like Figure 7 As shown, the optical lens, along the optical axis from the object side to the imaging plane IMA, includes, in sequence, 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, a ninth lens L9, and a tenth lens L10. An aperture stop (STOP) is provided between the fifth lens L5 and the sixth lens L6.

[0147] The first lens L1 has negative optical power, with its object side S1 being convex and its image side S2 being concave.

[0148] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0149] The third lens L3 has positive optical power, and its object side S5 is convex, while its image side S6 is convex.

[0150] The fourth lens L4 has negative optical power, with its object side S7 being concave and its image side S8 being convex.

[0151] The fifth lens L5 has positive optical power, and its object side S9 is convex, and its image side S10 is convex.

[0152] The sixth lens L6 has positive optical power, and its object side S11 is convex, and its image side S12 is convex.

[0153] The seventh lens L7 has negative optical power, with its object side S13 being convex and its image side S14 being concave.

[0154] The eighth lens L8 has negative optical power, and its object side S15 is concave, and its image side S16 is concave.

[0155] The ninth lens L9 has positive optical power, with its object side S17 being convex and its image side S18 being concave.

[0156] The tenth lens L10 has negative optical power, with its object side S19 being convex and its image side S20 being concave.

[0157] A filter CG can also be disposed between the tenth lens L10 and the imaging plane IMA. The filter CG has an object-side surface S21 and an image-side surface S22. Light from the object passes sequentially through each surface S1 to S22 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S22 are... Figure 7 Not shown in the image.

[0158] Table 7 shows the basic parameters of the optical lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0159]

[0160]

[0161] Table 7

[0162] In this embodiment, the aperture number (FNO) of the optical lens is 2.2. The optical distortion of the optical lens is -9.00%. The maximum field of view (FOV) of the optical lens is 104.62°.

[0163] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the third lens E3 to the tenth lens E10, are aspherical. Table 8 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical surface S5-S20 in Embodiment 4. 10 A 12 A 14 and A 16 .

[0164] Face number k A4 A6 A8 A10 A12 A14 A16 S5 -40.85 -4.88E-05 1.41E-06 8.77E-09 -1.09E-10 0.00 0.00 0.00 S6 11.45 -3.16E-04 3.06E-06 -2.30E-10 -2.76E-11 0.00 0.00 0.00 S7 53.16 -2.29E-04 -3.84E-06 7.10E-08 5.85E-11 0.00 0.00 0.00 S8 -839.01 -1.80E-04 -1.50E-07 2.20E-08 1.23E-10 0.00 0.00 0.00 S9 -1.16 -2.29E-04 3.36E-06 -9.96E-08 3.59E-10 0.00 0.00 0.00 S10 -6.91 -2.27E-04 3.35E-06 -6.97E-08 4.01E-10 0.00 0.00 0.00 S11 2.40 -8.09E-04 -3.33E-05 -7.45E-08 -3.52E-07 0.00 0.00 0.00 S12 -8.41 -1.19E-03 -9.40E-05 3.27E-06 -2.54E-07 0.00 0.00 0.00 S13 -6.13 -1.74E-03 1.93E-05 -4.26E-06 2.70E-07 0.00 0.00 0.00 S14 -5.44 5.83E-04 -5.19E-05 5.18E-07 4.68E-08 0.00 0.00 0.00 S15 -199.80 -1.30E-03 -1.47E-04 6.10E-06 1.36E-08 0.00 0.00 0.00 S16 12.88 -1.91E-03 -5.23E-05 3.03E-06 2.81E-08 0.00 0.00 0.00 S17 -28.93 -8.84E-04 7.91E-05 -1.88E-06 8.34E-11 0.00 0.00 0.00 S18 -99.00 -1.39E-03 1.00E-04 -2.11E-06 3.56E-09 0.00 0.00 0.00 S19 -23.94 -3.46E-03 7.77E-05 -2.98E-06 4.36E-08 0.00 0.00 0.00 S20 -10.07 -1.75E-03 4.44E-05 -9.40E-07 5.61E-09 0.00 0.00 0.00

[0165] Table 8

[0166] Figure 8 The distortion curve for the optical lens in Example 4 represents the distortion magnitude corresponding to different image heights. According to... Figure 8 It can be seen that the optical lens of Example 4 has a small distortion value and can achieve good imaging quality.

[0167] In summary, the conditional expressions in Examples 1 to 4 satisfy the relationships shown in Table 9.

[0168]

[0169]

[0170] Table 9

[0171] This application also provides an imaging device, wherein the electronic photosensitive element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS), and the imaging device is equipped with the optical lens described above.

[0172] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens characterized in that, sequentially include, along the optical axis from the object side to the image side: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with negative refractive power; a fifth lens with positive refractive power; a sixth lens with positive refractive power; a seventh lens with negative refractive power; an eighth lens with negative refractive power; a ninth lens with positive refractive power; and a tenth lens with negative refractive power; wherein the optical lens has a total of ten lenses with refractive power; and an effective focal length F8 of the eighth lens and a total effective focal length F of the optical lens satisfy: -4.96≤F8 / F≤-2.

98.

2. The optical lens according to claim 1, wherein an object side surface of the first lens is convex, and an image side surface of the first lens is concave; an object side surface of the second lens is convex, and an image side surface of the second lens is concave; an object side surface of the third lens is convex, and an image side surface of the third lens is convex; an object side surface of the fourth lens is concave, and an image side surface of the fourth lens is convex; an object side surface of the fifth lens is convex, and an image side surface of the fifth lens is convex; an object side surface of the sixth lens is convex, and an image side surface of the sixth lens is convex; an object side surface of the seventh lens is convex, and an image side surface of the seventh lens is concave; an object side surface of the eighth lens is concave, and an image side surface of the eighth lens is concave; an object side surface of the ninth lens is convex, and an image side surface of the ninth lens is concave; and an object side surface of the tenth lens is convex, and an image side surface of the tenth lens is concave.

3. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: -6.0≤F1 / F≤-4.5, wherein F1 is an effective focal length of the first lens.

4. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: -3.52≤F2 / F≤-3.05, wherein F2 is an effective focal length of the second lens.

5. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: -3.4≤F / (R31+R32)≤7.53, wherein R31 is a curvature radius of an object side surface of the third lens, and R32 is a curvature radius of an image side surface of the third lens.

6. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: -0.15≤F / (R41+R42)≤0, wherein R41 is a curvature radius of an object side surface of the fourth lens, and R42 is a curvature radius of an image side surface of the fourth lens.

7. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: 11.45≤V5 / F≤11.92 and 11.45≤V6 / F≤11.92, wherein V5 is an Abbe number of the fifth lens, and V6 is an Abbe number of the sixth lens.

8. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: 5.16≤TTL / F≤5.89, wherein TTL is an optical total track length of the optical lens.

9. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: 0.236≤BFL / F≤0.287, wherein BFL is a back focal length of the optical lens.

10. The optical lens of claim 1 or 2, wherein, The optical lens further satisfies: 6.98≤F9 / F≤11.45, wherein F9 is an effective focal length of the ninth lens.

11. The optical lens of claims 1 or 2, wherein, The optical lens further satisfies: -0.423≤D7 / F7≤-0.345, wherein D7 is a maximum optical half aperture of the seventh lens, and F7 is an effective focal length of the seventh lens.

12. The optical lens of claim 1 or 2, wherein, The optical lens also satisfies: -0.435≤D8 / F8≤-0.213, wherein D8 is the maximum optical half aperture of the eighth lens.

13. The optical lens of claims 1 or 2, wherein, The optical lens also satisfies: 0.121≤D9 / F9≤0.257, wherein D9 is the maximum optical half aperture of the ninth lens, and F9 is the effective focal length of the ninth lens.

14. The optical lens of claims 1 or 2, wherein, The optical lens also satisfies: -0.532≤D10 / F10≤-0.133, wherein D10 is the maximum optical half aperture of the tenth lens, and F10 is the effective focal length of the tenth lens.

15. The optical lens of claims 1 or 2, wherein, The optical lens also satisfies: -0.42≤F3 / F4≤-0.17, wherein F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

16. The optical lens of claims 1 or 2, wherein, The optical lens also satisfies: 0.97≤(F3+F4) / (F7+F8+F9+F10)≤2.15, wherein F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, F9 is the effective focal length of the ninth lens, and F10 is the effective focal length of the tenth lens.

Images