Optical lens

Abstract

The application provides an optical lens, which comprises, along an optical axis from an object side to an imaging surface, a first lens with negative focal power, wherein an object side surface of the first lens is a convex surface and an image side surface of the first lens is a concave surface; a second lens with positive focal power, wherein an object side surface of the second lens is a concave surface and an image side surface of the second lens is a convex surface; a stop; a third lens with positive focal power, wherein an object side surface of the third lens is a convex surface and an image side surface of the third lens is a convex surface; a fourth lens with negative focal power, wherein an object side surface of the fourth lens is a concave surface and an image side surface of the fourth lens is a convex surface near an optical axis; and a fifth lens with positive focal power, wherein an object side surface of the fifth lens is a convex surface; wherein a maximum field of view FOV and an aperture value FNO of the optical lens satisfy 95°<FOV / FNO<120°. The optical lens provided by the application has the advantages of small volume, large field of view and high resolution.

Description

Technical Field

[0001] This invention relates to the field of imaging lens technology, and more specifically, to an optical lens. Background Technology

[0002] With the rapid development of fields such as drones, security, automobiles, meteorology, and medicine, increasingly higher demands are being placed on the field of view of their lenses. Ultra-wide-angle lenses, by introducing barrel distortion, can compress light rays at the edges of the field of view as much as possible, thereby achieving a field of view exceeding 180°. However, current ultra-wide-angle lenses still suffer from problems such as small aperture and long overall length. Therefore, we will develop and design an optical lens with a large aperture, a wide field of view, and a small size. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide an optical lens that has at least the advantages of a large field of view and a large aperture.

[0004] To achieve the above-mentioned objective, this invention provides an optical lens comprising five lenses, arranged sequentially along the optical axis from the object side to the imaging plane: a first lens with negative optical power, the object side of which is convex and the image side of which is concave; a second lens with positive optical power, the object side of which is concave and the image side of which is convex; an aperture stop; a third lens with positive optical power, the object side of which is convex and the image side of which is convex; a fourth lens with negative optical power, the object side of which is concave and the image side of which is convex near the optical axis; and a fifth lens with positive optical power, the object side of which is convex; wherein the maximum field of view (FOV) of the optical lens and the aperture value (FNO) satisfy the following condition: 95° < FOV / FNO < 120°.

[0005] Compared with existing technologies, the optical lens provided by this invention uses five lenses with a specific combination of optical power and a specific surface shape, and the aperture stop position is set reasonably, so that the optical lens has a large aperture, a large field of view, a small size and good imaging quality. Attached Figure Description

[0006] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0007] Figure 1 This is a schematic diagram of the structure of the optical lens according to the first embodiment of the present invention;

[0008] Figure 2 This is an F-Theta distortion curve of the optical lens according to the first embodiment of the present invention;

[0009] Figure 3 This is a field curvature curve diagram of the optical lens according to the first embodiment of the present invention;

[0010] Figure 4 This is a chromatic aberration curve of the optical lens according to the first embodiment of the present invention;

[0011] Figure 5 This is an axial chromatic aberration curve of the optical lens according to the first embodiment of the present invention;

[0012] Figure 6 This is a schematic diagram of the structure of the optical lens according to the second embodiment of the present invention;

[0013] Figure 7 This is an F-Theta distortion curve of the optical lens according to the second embodiment of the present invention;

[0014] Figure 8 This is a field curvature curve diagram of the optical lens according to the second embodiment of the present invention;

[0015] Figure 9 This is a chromatic aberration curve of the optical lens according to the second embodiment of the present invention;

[0016] Figure 10 This is an axial chromatic aberration curve of the optical lens according to the second embodiment of the present invention;

[0017] Figure 11 This is a schematic diagram of the optical lens structure according to the third embodiment of the present invention;

[0018] Figure 12 This is an F-Theta distortion curve of the optical lens according to the third embodiment of the present invention;

[0019] Figure 13 This is a field curvature curve diagram of the optical lens according to the third embodiment of the present invention;

[0020] Figure 14 This is a chromatic aberration curve of the optical lens according to the third embodiment of the present invention;

[0021] Figure 15 This is an axial chromatic aberration curve of the optical lens according to the third embodiment of the present invention;

[0022] Figure 16 This is a schematic diagram of the structure of the optical lens according to the fourth embodiment of the present invention;

[0023] Figure 17 This is an F-Theta distortion curve of the optical lens according to the fourth embodiment of the present invention;

[0024] Figure 18 This is a field curvature curve diagram of the optical lens according to the fourth embodiment of the present invention;

[0025] Figure 19 This is a chromatic aberration curve of the optical lens according to the fourth embodiment of the present invention.

[0026] Figure 20 This is an axial chromatic aberration curve of the optical lens according to the fourth embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Throughout this specification, the same reference numerals refer to the same elements.

[0029] The present invention proposes an optical lens, which includes, in sequence along the optical axis from the object side to the imaging plane: a first lens, a second lens, an aperture stop, a third lens, a fourth lens, a fifth lens, and a filter.

[0030] The first lens has negative optical power, with a convex object side and a concave image side; the second lens has positive optical power, with a concave object side and a convex image side; the third lens has positive optical power, with a convex object side and a convex image side; the fourth lens has negative optical power, with a concave object side and a convex image side near the optical axis; and the fifth lens has positive optical power, with a convex object side and either a concave or convex image side. The first lens is a spherical lens, while the second, third, fourth, and fifth lenses are all aspherical lenses.

[0031] In some embodiments, the optical lens satisfies the following condition:

[0032] 95° < FOV / FNO < 120°; (1)

[0033] 1.78<f / EPD<1.89; (2)

[0034] EPD < 0.48 mm; (3)

[0035] Wherein, FOV represents the maximum field of view of the optical lens, f represents the effective focal length of the optical lens, FNO represents the aperture number of the optical lens, and EPD represents the entrance pupil diameter of the optical lens. By satisfying the above conditions (1) to (3), and by reasonably adjusting the ratio of the field of view to the aperture number of the optical lens, the optical lens can achieve a balance between a large aperture and an ultra-large field of view.

[0036] In some embodiments, the optical lens satisfies the following condition:

[0037] 0.2<(TTL-ΣCT) / (TTL+ΣCT)<0.3; (4)

[0038] 0.2<(TTL-ΣET) / (TTL+ΣET)<0.3; (5)

[0039] TTL≤8.30mm; (6)

[0040] Wherein, ΣCT represents the sum of the center thicknesses of the first lens to the fifth lens, ΣET represents the sum of the edge thicknesses of the first lens to the fifth lens, and TTL represents the total optical length of the optical lens. By satisfying the above conditions (4) to (6) and reasonably setting the values ​​of ΣCT, ΣET, and TTL, it is helpful to shorten the total length of the optical lens and realize the miniaturization of the optical lens.

[0041] In some embodiments, the optical lens satisfies the following condition:

[0042] 3.5 rad / mm <MFOV / (π*TTL)<4.0 rad / mm; (7)

[0043] Where MFOV represents the maximum half field of view of the optical lens, and TTL represents the total optical length of the optical lens. By satisfying the above condition (7), while ensuring that the optical lens has an ultra-large field of view, the total length of the optical lens can be made relatively small, so as to achieve the miniaturization of the optical lens.

[0044] In some embodiments, the optical lens satisfies the following condition:

[0045] 0.8<(TTL-EPD) / (TTL+EPD)<1.0; (8)

[0046] Where TTL represents the total optical length of the optical lens, and EPD represents the entrance pupil diameter of the optical lens. By satisfying the above condition (8) and reasonably adjusting the total optical length and entrance pupil diameter of the optical lens, a good balance between small size and high-quality imaging of the optical lens can be achieved.

[0047] In some embodiments, the optical lens satisfies the following condition:

[0048] 0.3 mm² / rad<π*IH*TTL / MFOV<0.4 mm² / rad; (9)

[0049] Wherein, IH represents the half-image height of the optical lens, TTL represents the total optical length of the optical lens, and MFOV represents the maximum half-field-of-view of the optical lens. By satisfying the above condition (9), under the condition of satisfying the largest possible field of view, a relatively perfect combination between the total length and image height of the optical lens can be achieved.

[0050] In some embodiments, the optical lens satisfies the following condition:

[0051] 4.0 < ΣCT / f < 6.0; (10)

[0052] Where f represents the effective focal length of the optical lens, and ΣCT represents the sum of the center thicknesses of the first to the fifth lenses. By satisfying the above condition (10) and rationally allocating the center thicknesses of each lens, the manufacturing yield of the optical lens can be improved, while also helping to shorten the overall length of the optical lens and maintain its miniaturization, which is beneficial for its application in portable electronic products.

[0053] In some embodiments, the optical lens satisfies the following condition:

[0054] 1.0 < f3 / f < 1.8; (11)

[0055] -1.5 < f4 / f < -1.0; (12)

[0056] 1.5 < f5 / f < 3.0; (13)

[0057] 4.0<(f3+|f4|+f5) / f<7.0; (14)

[0058] Wherein, f3 represents the effective focal length of the third lens, f4 represents the effective focal length of the fourth lens, f5 represents the effective focal length of the fifth lens, and f represents the effective focal length of the optical lens. Satisfying the above condition (11) allows the third lens to have an appropriate positive optical power, which is beneficial for suppressing the incident angle at the edge of the field of view; satisfying the above condition (12) allows the fourth lens to have an appropriate negative optical power, which is beneficial for effectively transmitting more light beams to the rear end of the optical lens; satisfying the above condition (13) allows the fifth lens to have an appropriate positive optical power, which is beneficial for balancing the off-axis aberrations of the optical lens and increasing the imaging area of ​​the optical lens; satisfying the above condition (14) is beneficial for correcting various aberrations caused by the third, fourth, and fifth lenses and improving the imaging quality of the optical lens.

[0059] In some embodiments, the optical lens satisfies the following condition:

[0060] 0.03<AT23 / TTL<0.10; (15)

[0061] 1.20<(CT3+CT4+CT5+AT34+AT45+TTL) / TTL<1.35; (16)

[0062] 0.5<(CT3+CT4+CT5) / (ET3+ET4+ET5)<2.0; (17)

[0063] Wherein, CT3 represents the center thickness of the third lens, ET3 represents the edge thickness of the third lens, CT4 represents the center thickness of the fourth lens, ET4 represents the edge thickness of the fourth lens, CT5 represents the center thickness of the fifth lens, ET5 represents the edge thickness of the fifth lens, AT23 represents the air gap between the second lens and the third lens, AT34 represents the air gap between the third lens and the fourth lens, AT45 represents the air gap between the fourth lens and the fifth lens, and TTL represents the total optical length of the optical lens. By satisfying the above conditions (15) to (17), and by reasonably allocating the center and edge thicknesses of the third, fourth, and fifth lenses, as well as the air gaps between the second, third, fourth, and fifth lenses, it is beneficial to reduce the total length of the optical lens and improve the assembly yield of the optical lens.

[0064] In some embodiments, the optical lens satisfies the following condition:

[0065] 1.0<(R11+R12) / (R11-R12)<1.68; (18)

[0066] Where R11 represents the radius of curvature of the object side of the first lens, and R12 represents the radius of curvature of the image side of the first lens. By satisfying the above condition (18), the shape of the first lens can be reasonably controlled, which is beneficial to better correct the aberrations of the optical system.

[0067] In some embodiments, the optical lens satisfies the following condition:

[0068] 2 < f² / f < 7; (19)

[0069] 0<(R21-R22) / (R21+R22)<1; (20)

[0070] Where f2 represents the effective focal length of the second lens, f represents the effective focal length of the optical lens, R21 represents the radius of curvature of the object side of the second lens, and R22 represents the radius of curvature of the image side of the second lens. By satisfying the above conditions (19) and (20) and reasonably adjusting the focal length and surface shape of the second lens, the shape change of the second lens can be slowed down, the system sensitivity can be reduced, and the formability of the lens can be improved, thereby increasing the manufacturing yield.

[0071] In some embodiments, the optical lens satisfies the following condition:

[0072] 20° < CRA < 30°; (21)

[0073] Wherein, CRA represents the maximum principal ray incident angle of the optical lens. Satisfying the above condition (21) can better match the principal ray incident angle of the chip, improve the chip's efficiency in receiving light energy, and at the same time avoid abnormal phenomena such as vignetting and color cast, thus achieving good imaging results.

[0074] As one implementation method, the optical lens provided in this invention can use all-plastic lenses or a combination of glass and plastic, both of which can achieve good imaging results. In this application, in order to better reduce the overall length of the lens and increase the field of view, a combination of one glass spherical lens and four plastic aspherical lenses is used. By reasonably allocating the optical power of each lens and optimizing the shape of the aspherical lenses, the optical lens has at least the advantages of good imaging quality, large aperture, low sensitivity, and miniaturization. Specifically, the second to fifth lenses are all plastic aspherical lenses. By using aspherical lenses, this application can effectively correct aberrations, improve imaging quality, and provide a more cost-effective optical performance product.

[0075] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical lens are different; for specific differences, please refer to the parameter tables of each embodiment. The following embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

[0076] In various embodiments of the present invention, when an aspherical lens is used, the surface shape of the aspherical lens satisfies the following equation:

[0077]

[0078] Where z is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis, c is the paraxial curvature of the surface, k is the conic coefficient, and A 2i For the aspherical surface shape coefficient of the 2ith order.

[0079] First Embodiment

[0080] Please see Figure 1The diagram shows a schematic of the structure of an optical lens 100 provided in the first embodiment of the present invention. The optical lens 100 includes, along the optical axis from the object side to the imaging plane S13, the following components in sequence: a first lens L1, a second lens L2, an aperture ST, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter G1.

[0081] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has negative optical power, its object-side surface S7 is concave, and its image-side surface S8 is convex near the optical axis. The fifth lens L5 has positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave near the optical axis. The filter G1 has an object-side surface S11 and an image-side surface S12. The first lens L1 is a glass spherical lens, while the second lens L2, third lens L3, fourth lens L4, and fifth lens L5 are all plastic aspherical lenses.

[0082] Specifically, the design parameters of each lens of the optical lens 100 provided in this embodiment are shown in Table 1.

[0083] Table 1

[0084]

[0085] The surface shape coefficients of each aspherical surface of the optical lens 100 in the embodiment are shown in Table 2.

[0086] Table 2

[0087]

[0088] Please refer to Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The figures shown are the F-Theta distortion curve, field curvature curve, transverse chromatic aberration curve, and axial chromatic aberration curve of the optical lens 100. Figure 2 It can be seen that the optical distortion is controlled within ±5%, indicating that the distortion of the optical lens 100 has been well corrected; from Figure 3 As can be seen, the field curvature is controlled within ±0.04mm, indicating that the field curvature correction of the optical lens 100 is good; from Figure 4 It can be seen that the transverse chromatic difference at different wavelengths is controlled within ±3.1 micrometers. Figure 5It can be seen that the lateral chromatic aberration at different wavelengths is controlled within ±20 micrometers, indicating that the chromatic aberration of the optical lens 100 is well corrected; from Figure 2 , Figure 3 , Figure 4 and Figure 5 It can be seen that the optical lens 100 has good optical imaging quality.

[0089] Second Embodiment

[0090] Please see Figure 6 The diagram below shows the structure of the optical lens 200 provided in the second embodiment. The optical lens 200 in this embodiment is roughly the same as that in the first embodiment, except that the curvature radius, aspherical coefficient, and thickness of each lens surface are different.

[0091] Specifically, the design parameters of the optical lens 200 provided in this embodiment are shown in Table 3.

[0092] Table 3

[0093]

[0094] In this embodiment, the surface shape coefficients of each aspherical surface of the optical lens 200 are shown in Table 4.

[0095] Table 4

[0096]

[0097] Please refer to Figure 7 , Figure 8 , Figure 9 as well as Figure 10 The figures shown are the F-Theta distortion curve, field curvature curve, transverse chromatic aberration curve, and axial chromatic aberration curve of the optical lens 200, respectively. Figure 7 It can be seen that the optical distortion is controlled within ±5%, indicating that the distortion of the 200mm optical lens has been well corrected; from Figure 8 As can be seen, the field curvature is controlled within ±0.05mm, indicating that the field curvature correction of the 200mm optical lens is good; from Figure 9 It can be seen that the lateral chromatic difference at different wavelengths is controlled within ±3.2 micrometers. Figure 10 It can be seen that the lateral chromatic aberration at different wavelengths is controlled within ±20 micrometers, indicating that the chromatic aberration of the optical lens 200 is well corrected; from Figure 7 , Figure 8 , Figure 9 and Figure 10 It can be seen that the optical lens has good optical imaging quality.

[0098] Third Embodiment

[0099] Please see Figure 11 This is a schematic diagram of the structure of the optical lens 300 provided in the third embodiment. The optical lens 300 in this embodiment is roughly the same as that in the first embodiment, except that the glass material of the first lens L1 is different from that in the first embodiment, and the radius of curvature, aspherical coefficient and thickness of each lens surface are different.

[0100] Specifically, the design parameters of the optical lens 300 provided in this embodiment are shown in Table 5.

[0101] Table 5

[0102]

[0103] In this embodiment, the surface shape coefficients of each aspherical surface of the optical lens 300 are shown in Table 6.

[0104] Table 6

[0105]

[0106] Please refer to Figure 12 , Figure 13 , Figure 14 as well as Figure 15 The figures shown are the F-Theta distortion curve, field curvature curve, transverse chromatic aberration curve, and axial chromatic aberration curve of the optical lens 300, respectively. Figure 12 It can be seen that the optical distortion is controlled within ±5%, indicating that the distortion of the 300mm optical lens has been well corrected; from Figure 13 It can be seen that the paraxial field curvature is controlled within ±0.05mm, indicating that the field curvature correction of the 300mm optical lens is good; from Figure 14 It can be seen that the lateral chromatic difference at different wavelengths is controlled within ±3 micrometers. Figure 15 It can be seen that the lateral chromatic aberration at different wavelengths is controlled within ±20 micrometers, indicating that the chromatic aberration of the optical lens 300 is well corrected; from Figure 12 , Figure 13 , Figure 14 and Figure 15 It can be seen that the optical lens 300 has good optical imaging quality.

[0107] Fourth embodiment

[0108] Please see Figure 13 This is a schematic diagram of the structure of the optical lens 400 provided in the fourth embodiment. The optical lens 400 in this embodiment is roughly the same as that in the first embodiment, except that the radius of curvature, aspherical coefficient and thickness of each lens surface are different.

[0109] Specifically, the design parameters of the optical lens 400 provided in this embodiment are shown in Table 7.

[0110] Table 7

[0111]

[0112] The surface coefficients of each aspherical surface of the optical lens 400 in this embodiment are shown in Table 8.

[0113] Table 8

[0114]

[0115] Please refer to Figure 17 , Figure 18 , Figure 19 as well as Figure 20 The figures shown are the F-Theta distortion curve, field curvature curve, transverse chromatic aberration curve, and axial chromatic aberration curve for the optical lens 400. Figure 17 It can be seen that the optical distortion is controlled within ±5%, indicating that the distortion of the 400mm optical lens has been well corrected; from Figure 18 It can be seen that the paraxial field curvature is controlled within ±0.1mm, indicating that the field curvature correction of the 400mm optical lens is good; from Figure 19 It can be seen that the transverse chromatic difference at different wavelengths is controlled within ±3.0 micrometers. Figure 20 It can be seen that the lateral chromatic aberration at different wavelengths is controlled within ±25 micrometers, indicating that the chromatic aberration of the optical lens 400 is well corrected; from Figure 17 , Figure 18 , Figure 19 and Figure 20 It can be seen that the optical lens 400 has good optical imaging quality.

[0116] Please refer to Table 9, which shows the optical characteristics of the optical lenses provided in the above four embodiments, including the maximum field of view (FOV), total optical length (TTL), half-image height (IH), effective focal length (f), and the relevant values ​​corresponding to each of the aforementioned conditional expressions.

[0117] Table 9

[0118]

[0119] As can be seen from the F-Theta distortion curves, field curvature curves, lateral chromatic aberration curves, and axial chromatic aberration curves of the various embodiments above, the F-Theta distortion value of the optical lens in each embodiment is within ±5%, the field curvature value is within ±0.1mm, the lateral chromatic aberration is within ±3.2 micrometers, and the axial chromatic aberration is within ±20 micrometers. This indicates that the optical lens provided by the present invention has advantages such as high imaging quality, large field of view, large aperture, and miniaturization, while also having good resolving power.

[0120] In summary, the optical lens provided by this invention employs five lenses with specific optical power. Through specific surface shape combinations and reasonable optical power allocation, the optical lens possesses advantages such as good image quality, low sensitivity, and miniaturization, enabling it to match an 819,000-pixel imaging chip. At the same time, by reasonably configuring the lens's large aperture and wide field of view, the amount of light entering the system can be increased while reducing the depth of field during shooting, thus ensuring the system's image quality in low-light environments.

[0121] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An optical lens having five lens elements with optical power, characterized in that, Along the optical axis from the object side to the imaging plane, the following are included in sequence: A first lens with negative optical power, wherein the object side of the first lens is convex and the image side of the first lens is concave. A second lens with positive optical power, wherein the object side of the second lens is concave and the image side of the second lens is convex; Aperture; A third lens with positive optical power, wherein the object-side surface of the third lens is convex and the image-side surface of the third lens is convex; A fourth lens with negative optical power, wherein the object side of the fourth lens is concave and the image side of the fourth lens is convex near the optical axis; A fifth lens with positive optical power, wherein the object side of the fifth lens is convex; Wherein, the maximum field of view (FOV) and aperture value (FNO) of the optical lens satisfy: 95° < FOV / FNO < 120°; The optical lens satisfies the following condition: -1.5 < f4 / f < -1.0; 4.0<(f3+|f4|+f5) / f<7.0; 1.78 < f / EPD < 1.89; 2 < f² / f < 7; Wherein, f3 represents the effective focal length of the third lens, f4 represents the effective focal length of the fourth lens, f5 represents the effective focal length of the fifth lens, f represents the effective focal length of the optical lens, EPD represents the entrance pupil diameter of the optical lens, and f2 represents the effective focal length of the second lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 0.2<(TTL-ΣCT) / (TTL+ΣCT)<0.3; 0.2<(TTL-ΣET) / (TTL+ΣET)<0.3; Wherein, TTL represents the total optical length of the optical lens, ΣCT represents the sum of the center thicknesses of the first lens to the fifth lens, and ΣET represents the sum of the edge thicknesses of the first lens to the fifth lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 3.5 rad / mm<MFOV / (π*TTL)<4.0 rad / mm; Wherein, MFOV represents the maximum half field of view of the optical lens, and TTL represents the total optical length of the optical lens.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 0.8<(TTL-EPD) / (TTL+EPD)<1.0; Wherein, TTL represents the total optical length of the optical lens, and EPD represents the entrance pupil diameter of the optical lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 0.3 mm² / rad<π*IH*TTL / MFOV<0.4 mm² / rad; Wherein, IH represents the half-image height of the optical lens, TTL represents the total optical length of the optical lens, and MFOV represents the maximum half-field-of-view angle of the optical lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 4.0 < ΣCT / f < 6.0; Where f represents the effective focal length of the optical lens, and ΣCT represents the sum of the center thicknesses of the first lens to the fifth lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 4.783≤(f3+|f4|+f5) / f≤5.049; -1.230≤f4 / f≤-1.184; 1.849≤f / EPD≤1.861; 3.884 ≤ f² / f ≤ 5.502; Wherein, f3 represents the effective focal length of the third lens, f4 represents the effective focal length of the fourth lens, f5 represents the effective focal length of the fifth lens, f represents the effective focal length of the optical lens, EPD represents the entrance pupil diameter of the optical lens, and f2 represents the effective focal length of the second lens.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 1.20<(CT3+CT4+CT5+AT34+AT45+TTL) / TTL<1.35; Wherein, CT3 represents the center thickness of the third lens, CT4 represents the center thickness of the fourth lens, CT5 represents the center thickness of the fifth lens, AT34 represents the air gap between the third lens and the fourth lens, AT45 represents the air gap between the fourth lens and the fifth lens, and TTL represents the total optical length of the optical lens.

9. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 0.5<(CT3+CT4+CT5) / (ET3+ET4+ET5)<2.0; Wherein, CT3 represents the center thickness of the third lens, ET3 represents the edge thickness of the third lens, CT4 represents the center thickness of the fourth lens, ET4 represents the edge thickness of the fourth lens, CT5 represents the center thickness of the fifth lens, and ET5 represents the edge thickness of the fifth lens.

10. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 1.0<(R11+R12) / (R11-R12)<1.68; Wherein, R11 represents the radius of curvature of the object side of the first lens, and R12 represents the radius of curvature of the image side of the first lens.

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