Optical lens

Abstract

The invention discloses an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, an eighth lens, a seventh lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis. The third lens has a negative refractive index, and an optical axis region of an object side surface of the third lens is a convex surface or a circumferential region of the object side surface of the third lens is a convex surface or an optical axis region of an image side surface of the third lens is a concave surface or a circumferential region of the image side surface is a concave surface. The eighth lens has a positive refractive index. The seventh lens has a negative refractive index. The fifth lens has a positive refractive index, and the circumferential area of the object side surface of the fifth lens is a convex surface. The optical axis area of the object side surface of the sixth lens is a convex surface, and the circumferential area of the object side surface of the sixth lens is a concave surface. The optical lens only comprises the eight lenses, and meets the requirements that Dmax12 / Sag12 is larger than or equal to 7.500 and Fno * D11t31 / EFL is larger than or equal to 1.500.

Description

Optical lens Technical Field

[0001] This invention relates to an optical element, and more particularly to an optical lens. Background Technology

[0002] In recent years, optical lenses have continuously evolved, expanding their applications beyond just image and video capture to include environmental monitoring, dashcam photography, virtual reality trackers (VR trackers), and facial recognition. In addition to demanding excellent image quality, users also have more diverse aesthetic requirements for the overall appearance of lenses, with a realistic human eye appearance being one such direction. Therefore, designing an optical lens that mimics the appearance of a human eye while maintaining excellent image quality regardless of its shape has become a challenging problem to solve. Summary of the Invention

[0003] This invention provides an optical lens, which is mainly used for capturing images and videos, and can be applied to various electronic products, such as mobile phones, cameras, tablet computers, personal digital assistants (PDAs), head-mounted displays (e.g., AR, VR, MR), or fixed and mobile machinery and equipment.

[0004] An embodiment of the present invention provides an optical lens comprising, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, an eighth lens, a seventh lens, a fifth lens, and a sixth lens. Each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through. The first lens is the first lens counted from the object side to the image side. The second lens is the second lens counted from the object side to the image side. The third lens is the third lens counted from the object side to the image side. The third lens has a negative refractive index, and the optical axis region of the object-side surface of the third lens is convex, or the circumferential region of the object-side surface of the third lens is convex, or the optical axis region of the image-side surface of the third lens is concave, or the circumferential region of the image-side surface of the third lens is concave. The fourth lens is the fourth lens counted from the object side to the image side. The eighth lens is the fourth lens counted from the image side to the object side, and the eighth lens has a positive refractive index. The seventh lens is the third lens counted from the image side to the object side, and the seventh lens has a negative refractive index. The fifth lens is the second lens counting from the image side to the object side. It has positive refractive index and a convex circular area on its object-side surface. The sixth lens is the first lens counting from the image side to the object side. Its optical axis region on the object-side surface is convex, and its circular area on the object-side surface is concave. An optical lens has only these eight lenses, and they satisfy Dmax12 / Sag12 ≥ 7.500 and Fno. D11t31 / EFL≥1.500, where Dmax12 is the distance between the two points formed by the maximum straight-line distance of the outermost edge contour of the image-side full surface of the first lens, Sag12 is the Sag value of the image-side surface of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object-side surface of the first lens to the object-side surface of the third lens, and EFL is the effective focal length of the optical lens.

[0005] An embodiment of the present invention provides an optical lens comprising, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through. The first lens is the first lens counted from the object side to the image side. The second lens is the second lens counted from the object side to the image side, and the optical axis region of the image-side surface of the second lens is concave. The third lens is the third lens counted from the object side to the image side, and the third lens has a negative refractive index and the circumferential region of the object-side surface of the third lens is convex. The fifth lens is the second lens counted from the image side to the object side, and the fifth lens has a positive refractive index and the optical axis region of the object-side surface of the fifth lens is convex. The sixth lens is the first lens counted from the image side to the object side, and the optical axis region of the object-side surface of the sixth lens is convex and the circumferential region of the object-side surface of the sixth lens is concave. The optical lens comprises no more than eight lenses in total, and satisfies Dmax12 / Sag12≥7.500 and Fno D11t31 / EFL≥2.000, where Dmax12 is the distance between the two points formed by the maximum straight-line distance of the outermost edge contour of the image-side full surface of the first lens, Sag12 is the Sag value of the image-side surface of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object-side surface of the first lens to the object-side surface of the third lens, and EFL is the effective focal length of the optical lens.

[0006] An embodiment of the present invention provides an optical lens comprising, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through. The first lens is the first lens counted from the object side to the image side. The second lens is the second lens counted from the object side to the image side, and the optical axis region of the image-side surface of the second lens is concave. The third lens is the third lens counted from the object side to the image side, and the third lens has a negative refractive index, and the circumferential region of the image-side surface of the third lens is concave. The fifth lens is the second lens counted from the image side to the object side, and the fifth lens has a positive refractive index, and the optical axis region of the object-side surface of the fifth lens is convex. The sixth lens is the first lens counted from the image side to the object side, and the optical axis region of the object-side surface of the sixth lens is convex, and the circumferential region of the object-side surface of the sixth lens is concave. The optical lens comprises no more than eight lenses in total, and satisfies Dmax12 / Sag12≥7.500 and Fno. D11t31 / EFL≥2.000, where Dmax12 is the distance between the two points formed by the maximum straight-line distance of the outermost edge contour of the image-side full surface of the first lens, Sag12 is the Sag value of the image-side surface of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object-side surface of the first lens to the object-side surface of the third lens, and EFL is the effective focal length of the optical lens.

[0007] Based on the above, the beneficial effects of the optical lens of the embodiment of the present invention are as follows: by satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index condition, and the design that satisfies the above-mentioned conditional formula, the optical lens can provide an appearance that is similar to that of the human eye and has excellent optical quality, while also having a large field of view. Attached Figure Description

[0008] Figure 1 is a schematic diagram illustrating the surface structure of a lens.

[0009] Figure 2 is a schematic diagram illustrating the concave and convex structure of a lens and the focal point of light rays.

[0010] Figure 3 is a schematic diagram illustrating the surface structure of a lens in Example 1.

[0011] Figure 4 is a schematic diagram illustrating the surface structure of a lens in Example 2.

[0012] Figure 5 is a schematic diagram illustrating the surface structure of a lens in Example 3.

[0013] Figure 6A illustrates the circular lens of the optical lens of the present invention.

[0014] Figure 6B illustrates the chamfered lens of the optical lens of the present invention.

[0015] Figure 6C illustrates a lens with a gate or assembly portion for the optical lens of the present invention.

[0016] Figure 6D illustrates the irregular profile lens of the optical lens of the present invention.

[0017] Figure 7 is a cross-sectional schematic diagram of the optical lens of the first embodiment of the present invention.

[0018] Figures 8A to 8D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the first embodiment.

[0019] Figure 9 shows detailed optical data of the optical lens of the first embodiment of the present invention.

[0020] Figure 10 shows the aspherical parameters of the optical lens of the first embodiment of the present invention.

[0021] Figure 11 is a cross-sectional schematic diagram of the optical lens of the second embodiment of the present invention.

[0022] Figures 12A to 12D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the second embodiment.

[0023] Figure 13 shows detailed optical data of the optical lens of the second embodiment of the present invention.

[0024] Figure 14 shows the aspherical parameters of the optical lens of the second embodiment of the present invention.

[0025] Figure 15A is a cross-sectional schematic diagram of the optical lens of the third embodiment of the present invention on the YZ plane.

[0026] Figure 15B is a cross-sectional schematic diagram of the optical lens of the third embodiment of the present invention on the XZ plane.

[0027] Figures 16A to 16D show the longitudinal spherical aberration and various aberrations of the optical lens in the third embodiment on the YZ plane.

[0028] Figures 16E to 16H show the longitudinal spherical aberration and various aberrations of the optical lens in the third embodiment on the XZ plane.

[0029] Figure 17 shows detailed optical data of the optical lens of the third embodiment of the present invention.

[0030] Figure 18 shows the aspherical parameters of the optical lens of the third embodiment of the present invention.

[0031] Figure 19A is a cross-sectional view of the optical lens of the fourth embodiment of the present invention on the YZ plane.

[0032] Figure 19B is a cross-sectional schematic diagram of the optical lens of the fourth embodiment of the present invention on the XZ plane.

[0033] Figures 20A to 20D show the longitudinal spherical aberration and various aberrations of the optical lens in the YZ plane according to the fourth embodiment.

[0034] Figures 20E to 20H show the longitudinal spherical aberration and various aberrations of the optical lens in the XZ plane according to the fourth embodiment.

[0035] Figure 21 shows detailed optical data of the optical lens of the fourth embodiment of the present invention.

[0036] Figure 22 shows the aspherical parameters of the optical lens of the fourth embodiment of the present invention.

[0037] Figure 23A is a cross-sectional view of the optical lens of the fifth embodiment of the present invention on the YZ plane.

[0038] Figure 23B is a cross-sectional schematic diagram of the optical lens of the fifth embodiment of the present invention on the XZ plane.

[0039] Figures 24A to 24D show the longitudinal spherical aberration and various aberrations of the optical lens in the fifth embodiment on the YZ plane.

[0040] Figures 24E to 24H show the longitudinal spherical aberration and various aberrations of the optical lens in the fifth embodiment on the XZ plane.

[0041] Figure 25 shows detailed optical data of the optical lens of the fifth embodiment of the present invention.

[0042] Figure 26 shows the aspherical parameters of the optical lens of the fifth embodiment of the present invention.

[0043] Figure 27A is a cross-sectional view of the optical lens of the sixth embodiment of the present invention on the YZ plane.

[0044] Figure 27B is a cross-sectional schematic diagram of the optical lens of the sixth embodiment of the present invention on the XZ plane.

[0045] Figures 28A to 28D show the longitudinal spherical aberration and various aberrations of the optical lens in the YZ plane according to the sixth embodiment.

[0046] Figures 28E to 28H show the longitudinal spherical aberration and various aberrations of the optical lens in the XZ plane of the sixth embodiment.

[0047] Figure 29 shows detailed optical data of the optical lens of the sixth embodiment of the present invention.

[0048] Figure 30 shows the aspherical parameters of the optical lens of the sixth embodiment of the present invention.

[0049] Figure 31 is a cross-sectional schematic diagram of the optical lens of the seventh embodiment of the present invention.

[0050] Figures 32A to 32D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the seventh embodiment.

[0051] Figure 33 shows detailed optical data of the optical lens of the seventh embodiment of the present invention.

[0052] Figure 34 shows the aspherical parameters of the optical lens of the seventh embodiment of the present invention.

[0053] Figure 35 is a cross-sectional schematic diagram of the optical lens of the eighth embodiment of the present invention.

[0054] Figures 36A to 36D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the eighth embodiment.

[0055] Figure 37 shows detailed optical data of the optical lens of the eighth embodiment of the present invention.

[0056] Figure 38 shows the aspherical parameters of the optical lens of the eighth embodiment of the present invention.

[0057] Figure 39 is a cross-sectional schematic diagram of the optical lens of the ninth embodiment of the present invention.

[0058] Figures 40A to 40D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the ninth embodiment.

[0059] Figure 41 shows detailed optical data of the optical lens of the ninth embodiment of the present invention.

[0060] Figure 42 shows the aspherical parameters of the optical lens of the ninth embodiment of the present invention.

[0061] Figure 43A is a cross-sectional schematic diagram of the optical lens of the tenth embodiment of the present invention on the YZ plane.

[0062] Figure 43B is a cross-sectional schematic diagram of the optical lens of the tenth embodiment of the present invention on the XZ plane.

[0063] Figures 44A to 44D show the longitudinal spherical aberration and various aberrations of the optical lens in the YZ plane according to the tenth embodiment.

[0064] Figures 44E to 44H show the longitudinal spherical aberration and various aberrations of the optical lens in the tenth embodiment on the XZ plane.

[0065] Figure 45 shows detailed optical data of the optical lens of the tenth embodiment of the present invention.

[0066] Figure 46 shows the aspherical parameters of the optical lens according to the tenth embodiment of the present invention.

[0067] Figure 47 is a cross-sectional schematic diagram of the optical lens of the eleventh embodiment of the present invention.

[0068] Figures 48A to 48D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the eleventh embodiment.

[0069] Figure 49 shows detailed optical data of the optical lens of the eleventh embodiment of the present invention.

[0070] Figure 50 shows the aspherical parameters of the optical lens according to the eleventh embodiment of the present invention.

[0071] Figure 51A is a cross-sectional schematic diagram of the optical lens of the twelfth embodiment of the present invention on the YZ plane.

[0072] Figure 51B is a cross-sectional schematic diagram of the optical lens of the twelfth embodiment of the present invention on the XZ plane.

[0073] Figures 52A to 52D show the longitudinal spherical aberration and various aberrations of the optical lens in the twelfth embodiment on the YZ plane.

[0074] Figures 52E to 52H show the longitudinal spherical aberration and various aberrations of the optical lens in the XZ plane of the twelfth embodiment.

[0075] Figure 53 shows detailed optical data of the optical lens of the twelfth embodiment of the present invention.

[0076] Figure 54 shows the aspherical parameters of the optical lens of the twelfth embodiment of the present invention.

[0077] Figure 55A is a cross-sectional schematic diagram of the optical lens of the thirteenth embodiment of the present invention on the YZ plane.

[0078] Figure 55B is a cross-sectional schematic diagram of the optical lens of the thirteenth embodiment of the present invention on the XZ plane.

[0079] Figures 56A to 56D show the longitudinal spherical aberration and various aberrations of the optical lens in the thirteenth embodiment on the YZ plane.

[0080] Figures 56E to 56H show the longitudinal spherical aberration and various aberrations of the optical lens in the thirteenth embodiment on the XZ plane.

[0081] Figure 57 shows detailed optical data for the optical lens of the thirteenth embodiment of the present invention.

[0082] Figure 58 shows the aspherical parameters of the optical lens according to the thirteenth embodiment of the present invention.

[0083] Figures 59 to 67 show the numerical values ​​of the important parameters and their relationships of the optical lenses of the first to thirteenth embodiments of the present invention.

[0084] Figure reference numerals: 0: Aperture; 1: First lens; 2: Second lens; 3: Third lens; 4: Fourth lens; 5: Fifth lens; 6: Sixth lens; 7: Seventh lens; 8: Eighth lens; 10: Optical imaging lens; 11, 21, 31, 41, 51, 61, 71, 81, 110, 410, 510, F1: Object side; 12, 22, 32, 42, 52, 62, 72, 82, 120, 320, F2: Image side; 99: Imaging plane; 100, 200, 300, 400, 500: Lenses; 130: Assembly part; 113, 123, 213, 223, 313, 323, 413, 423, 513, 523, 6 13, 623, 713, 723, 813, 823, Z1: Optical axis region; 114, 124, 214, 224, 314, 324, 414, 424, 514, 524, 614, 624, 714, 724, 814, 824, Z2: Circumferential region; 211, 212: Parallel rays; A1: Object side; A2: Image side; CP: Center point; CP1: First center point; CP2: Second center point; Dmax: Distance; EL: Extension line; F: Filter; I: Optical axis; Lm: Edge ray; Lc: Principal ray; M, R: Intersection point; OB: Optical boundary; TP1: First conversion point; TP2: Second conversion point; Z3: Relay region. Detailed Implementation

[0085] The terms "optical axis region," "circumferential region," "concave surface," and "convex surface" used in this specification and the claims should be interpreted based on the definitions listed in this specification.

[0086] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system, ranging from parallel to the optical axis to within a half-angle of view (HFOV) relative to the optical axis. The imaging rays are imaged on an imaging plane by the optical system. The statement "a lens has a positive (or negative) refractive index" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "object-side (or image-side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (as shown in Figure 1). The object-side (or image-side) of the lens may be divided into different regions depending on its location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0087] Figure 1 is a radial sectional view of lens 100. Two reference points are defined on the surface of lens 100: a center point and a transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. As illustrated in Figure 1, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in Figure 4), and the Nth transition point (farthest from the optical axis I).

[0088] When the lens surface has at least one transition point, the region from the center point to the first transition point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the transition point farthest from optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be included between the optical axis region and the circumferential region; the number of relay regions depends on the number of transition points. When the lens surface has no transition points, 0% to 50% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and 50% to 100% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region.

[0089] When a ray parallel to optical axis I passes through a region, if the ray bends towards optical axis I and the intersection point with optical axis I is located on the image side A2 of the lens, then that region is a convex surface. When a ray parallel to optical axis I passes through a region, if the extension of the ray intersects optical axis I at the object side A1 of the lens, then that region is a concave surface.

[0090] In addition, referring to Figure 1, lens 100 may also include an assembly portion 130 extending radially outward from optical boundary OB. Assembly portion 130 is generally used for assembling lens 100 to a corresponding element (not shown) in an optical system. Imaging rays do not reach assembly portion 130. The structure and shape of assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. Assembly portion 130 of the lens discussed below may be partially or entirely omitted in the figures.

[0091] Referring to Figure 2, the region between the center point CP and the first conversion point TP1 is defined as the optical axis region Z1. The region between the first conversion point TP1 and the optical boundary OB of the lens surface is defined as the circumferential region Z2. As shown in Figure 2, after passing through the optical axis region Z1, the parallel ray 211 intersects the optical axis I on the image side A2 of the lens 200, meaning the focal point of the parallel ray 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the ray intersects the optical axis I on the image side A2 of the lens 200, the optical axis region Z1 is convex. Conversely, the parallel ray 212 diverges after passing through the circumferential region Z2. As shown in Figure 2, the extension line EL of the parallel ray 212 after passing through the circumferential region Z2 intersects the optical axis I on the object side A1 of the lens 200, meaning the focal point of the parallel ray 212 passing through the circumferential region Z2 is located at point M on the object side A1 of the lens 200. Since the extension line EL of the light ray intersects the optical axis I at the object side A1 of the lens 200, the circumferential region Z2 is concave. In the lens 200 shown in Figure 2, the first conversion point TP1 is the boundary between the optical axis region and the circumferential region, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

[0092] On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R-value). The R-value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R-value indicates a convex optical axis region, while a negative R-value indicates a concave optical axis region. Conversely, for the image-side, a positive R-value indicates a concave optical axis region, while a negative R-value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" used in this specification may be used interchangeably.

[0093] Figures 3 to 5 provide examples of determining the surface shape and region boundaries of the lens region in various situations, including the aforementioned optical axis region, circumferential region, and relay region.

[0094] Figure 3 is a radial sectional view of lens 300. Referring to Figure 3, the image-side surface 320 of lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis region Z1 and the circumferential region Z2 of the image-side surface 320 of lens 300 are shown in Figure 3. The R value of this image-side surface 320 is positive (i.e., R>0), therefore, the optical axis region Z1 is concave.

[0095] Generally, the surface shape of each region bounded by the transition point will be opposite to that of the adjacent region. Therefore, the transition point can be used to define the change in surface shape, that is, from the transition point, the surface changes from concave to convex or from convex to concave. In Figure 3, since the optical axis region Z1 is concave, and the surface shape changes at the transition point TP1, the circumferential region Z2 is convex.

[0096] Figure 4 is a radial cross-sectional view of lens 400. Referring to Figure 4, the object-side surface 410 of lens 400 has a first conversion point TP1 and a second conversion point TP2. The area between the optical axis I and the first conversion point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of this object-side surface 410 is positive (i.e., R>0), therefore, the optical axis region Z1 is a convex surface.

[0097] The area between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential region Z2, which is also a convex surface. In addition, the area between the first conversion point TP1 and the second conversion point TP2 is defined as a relay region Z3, which is also a concave surface. Referring again to Figure 4, the object side surface 410, radially outward from the optical axis I, sequentially includes the optical axis region Z1 between the optical axis I and the first conversion point TP1, the relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and the circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis region Z1 is convex, and its surface shape changes from the first conversion point TP1 to concave, the relay region Z3 is concave. Furthermore, its surface shape changes back to convex from the second conversion point TP2, so the circumferential region Z2 is convex.

[0098] Figure 5 is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. Referring to the lens 500 shown in Figure 5, the optical axis region Z1 of the object-side surface 510 is defined as 50% of the distance from the optical axis I to the optical boundary OB of the lens surface. The R value of this object-side surface 510 is positive (i.e., R > 0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. Lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0099] Please refer to Figures 1 and 6A to 6D simultaneously. In different embodiments, lens 100 includes an object-side full surface and an image-side full surface, wherein the object-side full surface is all surfaces of the lens facing the object side, and the image-side full surface is all surfaces of the lens facing the image side. Specifically, the object-side full surface is composed of an object-side surface 110 and an object-side non-optical surface, and the image-side full surface is composed of an image-side surface 120 and an image-side non-optical surface. In other words, the object-side non-optical surface can be defined as the surface of lens 100 extending radially outward from the optical boundary OB and facing the object side A1, and the image-side non-optical surface can be defined as the surface of lens 100 extending radially outward from the optical boundary OB and facing the image side A2. It is used to design as an assembly structure, extend the outer contour structure of the lens, or modify the shape of the lens as needed, such as a fitting conical surface, a bearing plane, an ink-coated light-blocking part, or an assembly part 130, but the present invention is not limited thereto. In different types of lenses, the size of the object-side or image-side full surface varies depending on the actual shape of the lens. Therefore, the distance Dmax can be further defined as the distance formed by the two points where the outermost contours of the object-side or image-side full surface of the lens have the maximum straight-line distance, as shown in Figure 6A (circular lens), Figure 6B (cut-edge lens), Figure 6C (lens with a gate or assembly part), and Figure 6D (irregular contour lens). In other words, this distance Dmax is the maximum length of the object-side or image-side full surface of the lens. In practice, this distance can be obtained by placing the lens flat on a platform and measuring it by capturing an optical image of the object-side or image-side full surface, but the present invention is not limited to this.

[0100] Figure 7 is a cross-sectional schematic diagram of the optical lens of the first embodiment of the present invention, and Figures 8A to 8D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the first embodiment. Referring first to Figure 7, the optical lens 10 of the first embodiment of the present invention includes, along an optical axis I of the optical lens 10 from the object side A1 to the image side, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, an eighth lens 8, a seventh lens 7, a fifth lens 5, a sixth lens 6, and a filter F, wherein an aperture 0 is disposed between the fourth lens 4 and the eighth lens 8. When light emitted from an object to be photographed enters the optical lens 10 and passes through the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the aperture 0, the eighth lens 8, the seventh lens 7, the fifth lens 5, the sixth lens 6, and the filter F, an image is formed on an image plane 99. The filter F is disposed between the image side 62 of the sixth lens 6 and the image plane 99. It should be further noted that the object side A1 is the side facing the object to be photographed, while the image side A2 is the side facing the imaging plane 99. In one embodiment, the filter F may be an infrared cut-off filter, but the present invention is not limited thereto.

[0101] In this embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the eighth lens 8, the seventh lens 7, the fifth lens 5, the sixth lens 6 and the filter F of the optical lens 10 each have an object side facing the object side A1 and through which imaging light passes, 11, 21, 31, 41, 81, 71, 51, 61, F1 and an image side facing the image side A2 and through which imaging light passes, 12, 22, 32, 42, 82, 72, 52, 62, F2.

[0102] The first lens 1 has a positive refractive index. The first lens 1 can be made of plastic, but this invention is not limited thereto. The optical axis region 113 of the object-side surface 11 of the first lens 1 is convex, and its circumferential region 114 is also convex. The optical axis region 123 of the image-side surface 12 of the first lens 1 is concave, and its circumferential region 124 is also concave. In this embodiment, both the object-side surface 11 and the image-side surface 12 of the first lens 1 are spherical surfaces, but this invention is not limited thereto.

[0103] The second lens 2 has a negative refractive index. The material of the second lens 2 can be plastic, but this invention is not limited thereto. The optical axis region 213 of the object-side surface 21 of the second lens 2 is convex, and its circumferential region 214 is also convex. The optical axis region 223 of the image-side surface 22 of the second lens 2 is concave, and its circumferential region 224 is also concave. In this embodiment, both the object-side surface 21 and the image-side surface 22 of the second lens 2 are spherical, but this invention is not limited thereto.

[0104] The third lens 3 has a negative refractive index. The material of the third lens 3 can be plastic, but this invention is not limited thereto. The optical axis region 313 of the object-side surface 31 of the third lens 3 is convex, and its circumferential region 314 is also convex. The optical axis region 323 of the image-side surface 32 of the third lens 3 is concave, and its circumferential region 324 is also concave. In this embodiment, both the object-side surface 31 and the image-side surface 32 of the third lens 3 are aspherical surfaces, but this invention is not limited thereto.

[0105] The fourth lens 4 has a positive refractive index. The material of the fourth lens 4 can be plastic, but this invention is not limited thereto. The optical axis region 413 of the object-side surface 41 of the fourth lens 4 is concave, and its circumferential region 414 is also concave. The optical axis region 423 of the image-side surface 42 of the fourth lens 4 is convex, and its circumferential region 424 is also convex. In this embodiment, both the object-side surface 41 and the image-side surface 42 of the fourth lens 4 are aspherical, but this invention is not limited thereto.

[0106] The eighth lens 8 has a positive refractive index. The material of the eighth lens 8 can be plastic, but this invention is not limited thereto. The optical axis region 813 of the object-side surface 81 of the eighth lens 8 is convex, and its circumferential region 814 is also convex. The optical axis region 823 of the image-side surface 82 of the eighth lens 8 is convex, and its circumferential region 824 is also convex. In this embodiment, both the object-side surface 81 and the image-side surface 82 of the eighth lens 8 are aspherical, but this invention is not limited thereto.

[0107] The seventh lens 7 has a negative refractive index. The material of the seventh lens 7 can be plastic, but this invention is not limited thereto. The optical axis region 713 of the object-side surface 71 of the seventh lens 7 is convex, and its circumferential region 714 is concave. The optical axis region 723 of the image-side surface 72 of the seventh lens 7 is concave, and its circumferential region 724 is concave. In this embodiment, both the object-side surface 71 and the image-side surface 72 of the seventh lens 7 are aspherical, but this invention is not limited thereto.

[0108] The fifth lens 5 has a positive refractive index. The fifth lens 5 can be made of glass, but this invention is not limited thereto. The optical axis region 513 of the object-side surface 51 of the fifth lens 5 is convex, and its circumferential region 514 is also convex. The optical axis region 523 of the image-side surface 52 of the fifth lens 5 is convex, and its circumferential region 524 is also convex. In this embodiment, both the object-side surface 51 and the image-side surface 52 of the fifth lens 5 are spherical, but this invention is not limited thereto.

[0109] The sixth lens 6 has a negative refractive index. The material of the sixth lens 6 can be plastic, but this invention is not limited thereto. The optical axis region 613 of the object-side surface 61 of the sixth lens 6 is convex, and its circumferential region 614 is concave. The optical axis region 623 of the image-side surface 62 of the sixth lens 6 is concave, and its circumferential region 624 is convex. In this embodiment, both the object-side surface 61 and the image-side surface 62 of the sixth lens 6 are aspherical, but this invention is not limited thereto.

[0110] In this embodiment, the optical lens 10 has only the eight lenses mentioned above.

[0111] Other detailed optical data of the first embodiment are shown in Figure 9. The effective focal length (EFL) of the optical lens 10 of the first embodiment is 1.810 mm, the half field of view (HFOV) is 61.724 degrees, the aperture value (F-number, Fno) is 2.200, its system length is 6.569 mm, and the maximum image height is 1.624 mm. The system length refers to the distance from the object side 11 of the first lens 1 to the imaging plane 99 on the optical axis I. The material parameters of each component in the optical data of the embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can know the specific material implementation. For example, the first lens 1 is made of EXL1414T material, the second lens 2 is made of EXL1414T material, the third lens 3 is made of APL5014CL material, the fourth lens 4 is made of EP-8000 material, the eighth lens 8 is made of APL5014CL material, the seventh lens 7 is made of EP-9000 material, the fifth lens 5 is made of H-LAK53B material, the sixth lens 6 is made of APL5016SL material, and the filter F is made of BK7 material, but the invention is not limited thereto. In Figure 9, the refractive index (nd) is the refractive index of the material at the d-helium yellow line of 587.56 nm, and the Abbe number (Vd) is calculated based on the refractive index of the material at wavelengths d, F, and C of the Fraunhofer spectrum. The focal length values ​​disclosed in the optical data of the embodiments are calculated based on the refractive index of the band in which the optical system is implemented. Since the primary wavelength of the embodiments of the present invention is 555 nm, the focal length values ​​of the present invention are calculated based on the refractive index of the material at 555 nm.

[0112] In this embodiment, the object-side surfaces 31, 41, 81, 71, and 61, and the image-side surfaces 32, 42, 82, 72, and 62 of the third lens 3, fourth lens 4, eighth lens 8, seventh lens 7, and sixth lens 6 are all aspherical surfaces. Among them, the object-side surfaces 31, 41, 81, 71, and 61, and the image-side surfaces 32, 42, 82, 72, and 62 are general even-order aspherical surfaces. These aspherical surfaces are defined according to the following formula: (1) Where: R: radius of curvature of the lens surface near the optical axis I; Z: depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis I and the tangent plane at the vertex of the aspherical surface on the optical axis I); Y: distance between a point on the aspherical curve and the optical axis I; K: conic constant; a i : The i-th order aspherical coefficient.

[0113] The aspherical coefficients of the object-side surface 31 of the third lens 3 to the image-side surface 62 of the sixth lens 6 in formula (1) are shown in Figure 10. In Figure 10, column number 31 indicates the aspherical coefficient of the object-side surface 31 of the third lens 3, and so on for the other columns. In this embodiment, the second-order aspherical coefficient a2 is 0.

[0114] In addition, the relationship between the important parameters in the optical lens 10 of the first embodiment is shown in Figures 59 to 60 and 65, where Fno has no unit, HFOV is in degrees, V1 to V8 have no unit, and the units of the other parameters are millimeters.

[0115] Wherein, T1 is the thickness of the first lens 1 on optical axis I; T2 is the thickness of the second lens 2 on optical axis I; T3 is the thickness of the third lens 3 on optical axis I; T4 is the thickness of the fourth lens 4 on optical axis I; T5 is the thickness of the fifth lens 5 on optical axis I; T6 is the thickness of the sixth lens 6 on optical axis I; T7 is the thickness of the seventh lens 7 on optical axis I; T8 is the thickness of the eighth lens 8 on optical axis I; TF is the thickness of the filter F on optical axis I; G12 is the air gap between the first lens 1 and the second lens 2 on optical axis I, which is also the distance from the image side 12 of the first lens 1 to the object side 12 of the second lens 2. G23 is the distance between the second lens 2 and the third lens 3 on the optical axis I; G24 is the distance between the third lens 3 and the fourth lens 4 on the optical axis I; G56 is the distance between the image side 22 of the second lens 2 and the object side 31 of the third lens 3 on the optical axis I; G35 is the distance between the fourth lens 4 and the fifth lens 5 on the optical axis I; G56 is the distance between the image side 42 of the fourth lens 4 and the object side 51 of the fifth lens 5 on the optical axis I; G23 is the distance between the second lens 2 and the third lens 3 on the optical axis I, and also the distance between the image side 32 of the third lens 3 and the object side 41 of the fourth lens 4 on the optical axis I; G45 is the distance between the fourth lens 4 and the fifth lens 5 on the optical axis I, and also the distance between the image side 42 of the fourth lens 4 and the object side 51 of the fifth lens 5 on the optical axis I; G56 is the distance between the fifth lens 5 and the object side 51 of the fifth lens 5. The air gap between the fourth lens 4 and the seventh lens 7 on the optical axis I is also the distance between the image side 52 of the fifth lens 5 and the object side 61 of the sixth lens 6 on the optical axis I; G47 is the air gap between the fourth lens 4 and the seventh lens 7 on the optical axis I, and also the distance between the image side 42 of the fourth lens 4 and the object side 71 of the seventh lens 7 on the optical axis I; G75 is the air gap between the seventh lens 7 and the fifth lens 5 on the optical axis I, and also the distance between the image side 72 of the seventh lens 7 and the object side 51 of the fifth lens 5 on the optical axis I; G48 is the air gap between the fourth lens 4 and the eighth lens 8 on the optical axis I, and also the distance between the fourth lens 4 and the seventh lens 7 on the optical axis I. G87 is the distance on optical axis I from the image-side surface 42 of lens 4 to the object-side surface 81 of the eighth lens 8; G87 is the air gap on optical axis I between the eighth lens 8 and the seventh lens 7, and also the distance on optical axis I from the image-side surface 82 of the eighth lens 8 to the object-side surface 71 of the seventh lens 7; G6F is the air gap on optical axis I between the sixth lens 6 and the filter F, and also the distance on optical axis I from the image-side surface 62 of the sixth lens 6 to the object-side surface F1 of the filter F; GFP is the air gap on optical axis I between the filter F and the imaging plane 99; AAG is the sum of all air gaps on optical axis I between the first lens 1 and the sixth lens 6. If there are eight lenses, it is the sum of the seven air gaps G12, G23, G34, G48, G87, G75, and G56. If there are seven lenses, it is the sum of the six air gaps G12, G23, G34, G47, G75, and G56. If there are a total of six lenses, it is the sum of the five air gaps G12, G23, G34, G45, and G56; ALT is the sum of the thicknesses of all lenses from the first lens 1 to the sixth lens 6 on the optical axis I.If there are eight lenses, it is the sum of T1, T2, T3, T4, T8, T7, T5, and T6. If there are seven lenses, it is the sum of T1, T2, T3, T4, T7, T5, and T6. If there are six lenses, it is the sum of T1, T2, T3, T4, T5, and T6. TL is the distance on optical axis I from the object side 11 of the first lens 1 to the image side 62 of the sixth lens 6. TTL is the distance on optical axis I from the object side 11 of the first lens 1 to the image plane 99. BFL is the distance on optical axis I from the image side 62 of the sixth lens 6 to the image plane 99, which is the sum of G6F, TF, and GFP. Dmax12 is the two points with the maximum straight-line distance formed by the outermost edge contour of the entire image side surface of the first lens 1. The distance formed; Sag12 is the Sag value of the image side 12 of the first lens 1 on the optical maximum boundary, where Sag is the depth calculated by the formula of the lens surface (here, a spherical or toroidal surface) (the perpendicular distance between a point on the surface at a distance Y from the optical axis I and the tangent plane tangent to the vertex on the optical axis I); D11t31 is the distance from the object side 11 of the first lens 1 to the object side 31 of the third lens 3; Tmax is the maximum value of the lens thickness of the first lens 1 to the sixth lens 6 on the optical axis I. If there are eight lenses, it is the maximum value among T1, T2, T3, T4, T8, T7, T5, and T6. If there are seven lenses, it is the maximum value among T1, T2, T3, T4, T7, T5, and T6. If there are six lenses, it is the maximum value among T1, T2, T3, T4, T5, and T6; Tmin is the minimum value of the lens thickness of the first lens 1 to the sixth lens 6 on the optical axis I. If there are eight lenses, the value is the minimum among T1, T2, T3, T4, T8, T7, T5, and T6. If there are seven lenses, the value is the minimum among T1, T2, T3, T4, T7, T5, and T6. If there are six lenses, the value is the minimum among T1, T2, T3, T4, T5, and T6; Tavg is the average thickness of all lenses from lens 1 to lens 6 on optical axis I. If there are eight lenses, the value is the average of T1, T2, T3, T4, T8, T7, T5, and T6. If there are seven lenses, the value is the average of T1, T2, T3, T4, T7, T5, and T6. If there are six lenses, the value is the average of T1, T2, T3, T4, T5, and T6; Gmax is the maximum value of the air gap between lenses from lens 1 to lens 6 on optical axis I. If there are eight lenses in total, the maximum value among G12, G23, G34, G48, G87, G75, and G56 is given. If there are seven lenses in total, the maximum value among G12, G23, G34, G47, G75, and G56 is given. If there are six lenses in total, the maximum value among G12, G23, G34, G45, and G56 is given. Gmin is the minimum air gap among lenses 1 to 6 on the optical axis I.If there are eight lenses in total, the minimum value among G12, G23, G34, G48, G87, G75, and G56 is used. If there are seven lenses in total, the minimum value among G12, G23, G34, G47, G75, and G56 is used. If there are six lenses in total, the minimum value among G12, G23, G34, G45, and G56 is used. Gavg is the average value of all air gaps along optical axis I from lens 1 to lens 6. If there are eight lenses in total, the average value among G12, G23, G34, G48, G87, G75, and G56 is used. If there are seven lenses in total, the average value among G12, G23, G34, G47, G75, and G56 is used. If there are a total of six lenses, then it is the average value of G12, G23, G34, G45, and G56; EFL is the effective focal length of optical lens 10; HFOV is the half angle of view of optical lens 10 (half of the maximum angle of view); ImgH is the maximum image height of optical lens 10; and Fno is the aperture value of optical lens 10.

[0116] Furthermore, let us define: f1 as the focal length of the first lens 1; f2 as the focal length of the second lens 2; f3 as the focal length of the third lens 3; f4 as the focal length of the fourth lens 4; f5 as the focal length of the fifth lens 5; f6 as the focal length of the sixth lens 6; f7 as the focal length of the seventh lens 7; f8 as the focal length of the eighth lens 8; n1 as the nd refractive index of the first lens 1; n2 as the nd refractive index of the second lens 2; n3 as the nd refractive index of the third lens 3; n4 as the nd refractive index of the fourth lens 4; n5 as the nd refractive index of the fifth lens 5. nd refractive index; n6 is the nd refractive index of the sixth lens 6; n7 is the nd refractive index of the seventh lens 7; n8 is the nd refractive index of the eighth lens 8; V1 is the Vd Abbe number of the first lens 1; V2 is the Vd Abbe number of the second lens 2; V3 is the Vd Abbe number of the third lens 3; V4 is the Vd Abbe number of the fourth lens 4; V5 is the Vd Abbe number of the fifth lens 5; V6 is the Vd Abbe number of the sixth lens 6; V7 is the Vd Abbe number of the seventh lens 7; and V8 is the Vd Abbe number of the eighth lens 8.

[0117] Referring in conjunction with Figures 8A to 8D, Figure 8A illustrates the longitudinal spherical aberration of the first embodiment, while Figures 8B and 8C illustrate the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane 99 of the first embodiment when the wavelengths are 470 nm, 555 nm, and 650 nm, respectively. Figure 8D illustrates the distortion aberration on the imaging plane 99 of the first embodiment when the wavelengths are 470 nm, 555 nm, and 650 nm. As shown in Figure 8A, the longitudinal spherical aberration of this first embodiment is such that the curves for each wavelength are very close together and converge towards the center, indicating that off-axis rays at different heights for each wavelength are concentrated near the imaging point. The skewing of the curves for each wavelength shows that the imaging point deviation for off-axis rays at different heights is controlled within ±4.00 micrometers (μm). Therefore, this first embodiment significantly improves spherical aberration at the same wavelength. Furthermore, the distances between each representative wavelength are also quite close, indicating that the imaging positions representing different wavelengths are quite concentrated, thus significantly improving chromatic aberration as well.

[0118] In the two field curvature aberration diagrams in Figures 8B and 8C, the focal length variation for each representative wavelength falls within ±8.00 micrometers across the entire field of view, indicating that the optical system of this first embodiment can effectively eliminate aberrations. The distortion aberration diagram in Figure 8D shows that the distortion aberration of this first embodiment is maintained within ±60%, indicating that the distortion aberration of this first embodiment meets the optical quality requirements of the optical system. Therefore, this first embodiment, compared to existing optical lenses, still provides good optical quality even with a system length reduced to 6.569 mm. Thus, this first embodiment can provide a visual effect that approximates the human eye while maintaining good optical quality and manufacturing yield.

[0119] Figure 11 is a schematic diagram of the optical lens of the second embodiment of the present invention, while Figures 12A to 12D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the second embodiment. Referring first to Figure 11, a second embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 8, 7, 5, and 6 are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive index, and the second lens 2 has a positive refractive index. It should be noted that, for the sake of clear display, the labels of the optical axis region and the circumferential region with similar surface shape to the first embodiment are omitted in Figure 11.

[0120] The detailed optical data of the optical lens 10 of the second embodiment is shown in Figure 13. The effective focal length of the optical lens 10 of the second embodiment is 1.636 mm, the half angle of view (HFOV) is 61.724 degrees, the aperture value (Fno) is 2.200, the system length is 6.543 mm, and the maximum image height is 1.620 mm.

[0121] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the second embodiment are shown in Figure 14.

[0122] Furthermore, the relationship between the important parameters in the optical lens 10 of the second embodiment is shown in Figures 59 to 60 and 65.

[0123] As shown in Figure 12A, the longitudinal spherical aberration of this second embodiment controls the imaging point deviation of off-axis rays at different heights within ±4.00 micrometers. In the field curvature aberration diagrams of Figures 12B and 12C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±10.00 micrometers. The distortion aberration diagram in Figure 12D shows that the distortion aberration of this second embodiment is maintained within ±50%.

[0124] As can be seen from the above description, the system length TTL of the second embodiment is shorter than that of the first embodiment. The distortion aberration of the second embodiment is better than that of the first embodiment. Moreover, the thickness difference between the optical axis region and the circumferential region of the lens in the second embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0125] Figure 15A is a cross-sectional view of the optical lens of the third embodiment of the present invention in the YZ plane; Figure 15B is a cross-sectional view of the optical lens of the third embodiment of the present invention in the XZ plane; Figures 16A to 16D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the third embodiment in the YZ plane; and Figures 16E to 16H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the third embodiment in the XZ plane. Referring first to Figures 15A and 15B, a third embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 8, 7, 5, and 6 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. It should be noted that, in order to clearly show the figures, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figures 15A and 15B.

[0126] Detailed optical data of the optical lens 10 in the third embodiment are shown in Figure 17, where Ry R is the radius of curvature of the lens surface at the near-optical axis I along the Y-axis. x f is the radius of curvature of the lens surface at the near-optical axis I along the X-axis. y f is the focal length on the Y-axis. x The effective focal length of the optical lens 10 in the third embodiment is 1.981 mm, the half field of view (HFOVy) on the Y axis is 62.707 degrees, the half field of view (HFOVx) on the X axis is 62.597 degrees, the aperture value (Fno) is 2.200, the system length is 11.459 mm, and the maximum image height is 2.297 mm.

[0127] In this embodiment, the object-side surface 11 and image-side surface 12 of the first lens 1 are toroidal surfaces, and the object-side surface 21 and image-side surface 22 of the second lens 2 are toroidal surfaces, and are defined according to the following formulas (2) to (5): the curve in the YZ plane is defined as: (2) (3) (4) (5) Where: R y The radius of curvature of the lens surface at the near-optical axis I along the Y-axis; R x : Radius of curvature of the lens surface near the optical axis I on the X-axis; z: Depth of the annular surface (the perpendicular distance between a point on the annular surface and the tangent plane at the vertex of the annular surface on the optical axis I); X: X-axis coordinate value; Y: Y-axis coordinate value; K: Conic constant; a i : The i-th order aspherical coefficient.

[0128] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the third embodiment are shown in Figure 18.

[0129] Furthermore, the relationships between the important parameters in the optical lens 10 of the third embodiment are shown in Figures 59 to 60 and 65.

[0130] As shown in Figures 16A and 16E, the longitudinal spherical aberration of this third embodiment controls the point deviation of off-axis rays at different heights within ±25.00 micrometers. In the four field curvature aberration diagrams in Figures 16B and 16C, and Figures 16F and 16G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±40.00 micrometers. The distortion aberration diagrams in Figures 16D and 16H show that the distortion aberration of this third embodiment is maintained within ±45%.

[0131] As can be seen from the above description, the third embodiment has a larger half-angle of view than the first embodiment. The distortion aberration of the third embodiment is better than that of the first embodiment. Moreover, the thickness difference between the optical axis region and the circumferential region of the lens in the third embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0132] Figure 19A is a cross-sectional schematic diagram of the optical lens of the fourth embodiment of the present invention in the YZ plane; Figure 19B is a cross-sectional schematic diagram of the optical lens of the fourth embodiment of the present invention in the XZ plane; Figures 20A to 20D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the fourth embodiment in the YZ plane; and Figures 20E to 20H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the fourth embodiment in the XZ plane. Referring first to Figures 19A and 19B, a fourth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 8, 7, 5, and 6 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index in the Y-axis direction and a positive refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. It should be noted that, in order to clearly show the figures, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figures 19A and 19B.

[0133] The detailed optical data of the optical lens 10 of the fourth embodiment is shown in Figure 21. The effective focal length of the optical lens 10 of the fourth embodiment is 1.941 mm, the half-angle of view HFOVy on the Y-axis is 62.971 degrees, the half-angle of view HFOVx on the X-axis is 62.547 degrees, the aperture value (Fno) is 2.200, the system length is 7.705 mm, and the maximum image height is 2.297 mm.

[0134] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0135] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the fourth embodiment are shown in Figure 22.

[0136] Furthermore, the relationships between the important parameters in the optical lens 10 of the fourth embodiment are shown in Figures 59 to 60 and 65.

[0137] As shown in Figures 20A and 20E, the longitudinal spherical aberration of this fourth embodiment controls the point deviation of off-axis rays at different heights within ±25.00 micrometers. In the four field curvature aberration diagrams in Figures 20B and 20C, and Figures 20F and 20G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±40.00 micrometers. The distortion aberration diagrams in Figures 20D and 20H show that the distortion aberration of this fourth embodiment is maintained within ±45%.

[0138] As can be seen from the above description, the fourth embodiment has a larger half-angle of view than the first embodiment. The fourth embodiment also exhibits better distortion aberrations than the first embodiment. Furthermore, the fourth embodiment has a smaller thickness difference between the optical axis region and the circumferential region of the lens compared to the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0139] Figure 23A is a cross-sectional view of the optical lens of the fifth embodiment of the present invention in the YZ plane; Figure 23B is a cross-sectional view of the optical lens of the fifth embodiment of the present invention in the XZ plane; Figures 24A to 24D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the fifth embodiment in the YZ plane; and Figures 24E to 24H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the fifth embodiment in the XZ plane. Referring first to Figures 23A and 23B, a fifth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 8, 7, 5, and 6 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The fourth lens 4 has a negative refractive index. It should be noted that, in order to clearly show the figures, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figures 23A and 23B.

[0140] The detailed optical data of the optical lens 10 of the fifth embodiment is shown in Figure 25. The effective focal length of the optical lens 10 of the fifth embodiment is 1.990 mm, the half-angle of view HFOVy on the Y-axis is 61.954 degrees, the half-angle of view HFOVx on the X-axis is 63.469 degrees, the aperture value (Fno) is 2.200, the system length is 9.203 mm, and the maximum image height is 2.267 mm.

[0141] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0142] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the fifth embodiment are shown in Figure 26 in Formula (1).

[0143] Furthermore, the relationships between the important parameters in the optical lens 10 of the fifth embodiment are shown in Figures 59 to 60 and 65.

[0144] As shown in Figures 24A and 24E, the longitudinal spherical aberration of this fifth embodiment controls the point deviation of off-axis rays at different heights within ±20.00 micrometers. In the four field curvature aberration diagrams in Figures 24B and 24C, and Figures 24F and 24G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±25.00 micrometers. The distortion aberration diagrams in Figures 24D and 24H show that the distortion aberration of this fifth embodiment is maintained within ±45%.

[0145] As can be seen from the above description, the fifth embodiment has a larger half-angle of view than the first embodiment. The distortion aberration of the fifth embodiment is better than that of the first embodiment. Moreover, the thickness difference between the optical axis region and the circumferential region of the lens in the fifth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0146] Figure 27A is a cross-sectional view of the optical lens of the sixth embodiment of the present invention in the YZ plane; Figure 27B is a cross-sectional view of the optical lens of the sixth embodiment of the present invention in the XZ plane; Figures 28A to 28D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the sixth embodiment in the YZ plane; and Figures 28E to 28H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the sixth embodiment in the XZ plane. Referring first to Figures 27A and 27B, a sixth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 8, 7, 5, and 6 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The sixth lens 6 has a positive refractive index. It should be noted that, in order to clearly show the figures, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figures 27A and 27B.

[0147] The detailed optical data of the optical lens 10 of the sixth embodiment is shown in Figure 29. The effective focal length of the optical lens 10 of the sixth embodiment is 1.951 mm, the half-angle of view HFOVy on the Y-axis is 66.724 degrees, the half-angle of view HFOVx on the X-axis is 68.340 degrees, the aperture value (Fno) is 2.200, the system length is 9.779 mm, and the maximum image height is 2.297 mm.

[0148] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0149] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in formula (1) of the sixth embodiment are shown in Figure 30.

[0150] Furthermore, the relationships between the important parameters in the optical lens 10 of the sixth embodiment are shown in Figures 59 to 60 and 65.

[0151] As shown in Figures 28A and 28E, the longitudinal spherical aberration of this sixth embodiment controls the point deviation of off-axis rays at different heights within ±30.00 micrometers. In the four field curvature aberration diagrams in Figures 28B and 28C, and Figures 28F and 28G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±50.00 micrometers. The distortion aberration diagrams in Figures 28D and 28H show that the distortion aberration of this sixth embodiment is maintained within ±60%.

[0152] As can be seen from the above description, the half-angle of the sixth embodiment is larger than that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the sixth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0153] Figure 31 is a cross-sectional schematic diagram of the optical lens of the seventh embodiment of the present invention, while Figures 32A to 32D are longitudinal spherical aberration and various aberration diagrams of the optical lens of the seventh embodiment. Referring first to Figure 31, a seventh embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 7, 5, and 6 are more or less different. In addition, in this embodiment, the aperture 0 is set between the third lens 3 and the fourth lens 4. The first lens 1 has a negative refractive index. The second lens 2 has a positive refractive index. The optical axis region 413 of the object side 41 of the fourth lens 4 is convex, and its circumferential region 414 is convex. The optical axis region 713 of the object side 71 of the seventh lens 7 is concave, and the circumferential region 724 of the image side 72 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to the first embodiment are omitted in Figure 31.

[0154] In this embodiment, the optical lens 10 has only the seven lenses mentioned above.

[0155] Detailed optical data for the optical lens 10 of the seventh embodiment is shown in Figure 33. The effective focal length of the optical lens 10 in the seventh embodiment is 1.518 mm, the half-angle of view is 60.507 degrees, the aperture value (Fno) is 2.200, the system length is 5.805 mm, and the maximum image height is 2.495 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of EXL1414T material, the second lens 2 is made of EXL1414T material, the third lens 3 is made of APL5014CL material, the fourth lens 4 is made of APL5016SL material, the seventh lens 7 is made of OKP1 material, the fifth lens 5 is made of APL5016SL material, and the sixth lens 6 is made of OKP1 material, but the invention is not limited to these.

[0156] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the seventh embodiment are shown in Figure 34 in Formula (1).

[0157] Furthermore, the relationships between the important parameters in the optical lens 10 of the seventh embodiment are shown in Figures 61 to 62 and 66.

[0158] As shown in Figure 32A, the longitudinal spherical aberration of this seventh embodiment controls the point deviation of off-axis rays at different heights within ±35.00 micrometers. In the two field curvature aberration diagrams in Figures 32B and 32C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±25.00 micrometers. The distortion aberration diagram in Figure 32D shows that the distortion aberration of this seventh embodiment is maintained within ±8%.

[0159] As can be seen from the above description, the TTL of the system in the seventh embodiment is shorter than that in the first embodiment. The distortion aberration of the seventh embodiment is better than that of the first embodiment. Moreover, the thickness difference between the optical axis region and the circumferential region of the lens in the seventh embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0160] Figure 35 is a cross-sectional schematic diagram of the optical lens of the eighth embodiment of the present invention, while Figures 36A to 36D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the eighth embodiment. Referring first to Figure 35, an eighth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 7, 5, and 6 are more or less different. In addition, in this embodiment, the aperture 0 is set between the third lens 3 and the fourth lens 4. The optical axis region 413 of the object side 41 of the fourth lens 4 is convex, and the circumferential region 414 is convex. The circumferential region 724 of the image side 72 of the seventh lens 7 is convex. It should be noted that, for the sake of clear display, the labels of the optical axis region and the circumferential region with similar surface shapes to the first embodiment are omitted in Figure 35.

[0161] In this embodiment, the optical lens 10 has only the seven lenses mentioned above.

[0162] Detailed optical data for the optical lens 10 of the eighth embodiment is shown in Figure 37. The effective focal length of the optical lens 10 in the eighth embodiment is 1.501 mm, the half-angle of view is 58.634 degrees, the aperture value (Fno) is 2.200, the system length is 8.991 mm, and the maximum image height is 1.939 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of EXL1414T material, the second lens 2 is made of EXL1414T material, the third lens 3 is made of APL5014CL material, the fourth lens 4 is made of APL5016SL material, the seventh lens 7 is made of OKP1 material, the fifth lens 5 is made of APL5016SL material, and the sixth lens 6 is made of OKP1 material, but the invention is not limited to these.

[0163] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the eighth embodiment are shown in Figure 38 in Formula (1).

[0164] Furthermore, the relationships between the important parameters in the optical lens 10 of the eighth embodiment are shown in Figures 61 to 62 and 66.

[0165] As shown in Figure 36A, the longitudinal spherical aberration of this eighth embodiment controls the point deviation of off-axis rays at different heights within ±20.00 micrometers. In the two field curvature aberration diagrams in Figures 36B and 36C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±60.00 micrometers. The distortion aberration diagram in Figure 36D shows that the distortion aberration of this eighth embodiment is maintained within ±25%.

[0166] As can be seen from the above description, the distortion aberration of the eighth embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the eighth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0167] Figure 39 is a cross-sectional schematic diagram of the optical lens of the ninth embodiment of the present invention, while Figures 40A to 40D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the ninth embodiment. Referring first to Figure 39, a ninth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 7, 5, and 6 are more or less different. In addition, in this embodiment, the aperture 0 is set between the third lens 3 and the fourth lens 4. The first lens 1 has a negative refractive index. The second lens 2 has a positive refractive index. The optical axis region 313 of the object side 31 of the third lens 3 is concave. The optical axis region 413 of the object side 41 of the fourth lens 4 is convex, and its circumferential region 414 is convex. The optical axis region 713 of the object side 71 of the seventh lens 7 is concave, and the circumferential region 724 of the image side 72 is convex. The circumferential region 624 of the image side 62 of the sixth lens 6 is concave. It should be noted that, in order to clearly show the drawing, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figure 39.

[0168] In this embodiment, the optical lens 10 has only the seven lenses mentioned above.

[0169] Detailed optical data for the optical lens 10 of the ninth embodiment is shown in Figure 41. The effective focal length of the optical lens 10 in the ninth embodiment is 1.407 mm, the half-angle of view is 58.597 degrees, the aperture value (Fno) is 2.200, the system length is 9.701 mm, and the maximum image height is 1.663 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of EXL1414T material, the second lens 2 is made of EXL1414T material, the third lens 3 is made of APL5014CL material, the fourth lens 4 is made of APL5016SL material, the seventh lens 7 is made of OKP1 material, the fifth lens 5 is made of APL5016SL material, and the sixth lens 6 is made of OKP1 material, but the invention is not limited to these.

[0170] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in formula (1) of the ninth embodiment are shown in Figure 42.

[0171] Furthermore, the relationships between the important parameters in the optical lens 10 of the ninth embodiment are shown in Figures 61 to 62 and Figure 66.

[0172] As shown in Figure 40A, the longitudinal spherical aberration of this ninth embodiment controls the point deviation of off-axis rays at different heights within ±8.00 micrometers. In the two field curvature aberration diagrams in Figures 40B and 40C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±45.00 micrometers. The distortion aberration diagram in Figure 40D shows that the distortion aberration of this ninth embodiment is maintained within ±30%.

[0173] As can be seen from the above description, the distortion aberration of the ninth embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the ninth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0174] Figure 43A is a cross-sectional schematic diagram of the optical lens of the tenth embodiment of the present invention in the YZ plane; Figure 43B is a cross-sectional schematic diagram of the optical lens of the tenth embodiment of the present invention in the XZ plane; Figures 44A to 44D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the tenth embodiment in the YZ plane; and Figures 44E to 44H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the tenth embodiment in the XZ plane. Referring first to Figures 43A and 43B, a tenth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 7, 5, and 6 are more or less different. Furthermore, in this embodiment, the aperture 0 is positioned between the third lens 3 and the fourth lens 4. The first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The optical axis region 413 of the object-side surface 41 of the fourth lens 4 is convex, and its circumferential region 414 is also convex. The seventh lens 7 has a positive refractive index. The circumferential region 724 of the image-side surface 72 of the seventh lens 7 is convex. It should be noted that, for the sake of clear visualization, the labels for the optical axis region and circumferential region, which have similar surface shapes to those in the first embodiment, are omitted in Figures 43A and 43B.

[0175] In this embodiment, the optical lens 10 has only the seven lenses mentioned above.

[0176] Detailed optical data for the optical lens 10 of the tenth embodiment is shown in Figure 45. The effective focal length of the optical lens 10 of the tenth embodiment is 1.470 mm, the half-angle of view (HFOVy) on the Y-axis is 60.792 degrees, the half-angle of view (HFOVx) on the X-axis is 60.792 degrees, the aperture (Fno) is 2.800, the system length is 7.161 mm, and the maximum image height is 1.700 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of EXL1414T material, the second lens 2 is made of EXL1414T material, the third lens 3 is made of APL5014CL material, the fourth lens 4 is made of APL5016SL material, the seventh lens 7 is made of OKP1 material, the fifth lens 5 is made of APL5016SL material, and the sixth lens 6 is made of OKP1 material, but the invention is not limited to these.

[0177] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0178] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the tenth embodiment are shown in Figure 46 in Formula (1).

[0179] Furthermore, the relationships between the important parameters in the optical lens 10 of the tenth embodiment are shown in Figures 61 to 62 and 66.

[0180] As shown in Figures 44A and 44E, the longitudinal spherical aberration of this tenth embodiment controls the point deviation of off-axis rays at different heights within ±40.00 micrometers. In the four field curvature aberration diagrams in Figures 44B and 44C, and Figures 44F and 44G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±40.00 micrometers. The distortion aberration diagrams in Figures 44D and 44H show that the distortion aberration of this tenth embodiment is maintained within ±40%.

[0181] As can be seen from the above description, the distortion aberration of the tenth embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the tenth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0182] Figure 47 is a cross-sectional schematic diagram of the optical lens of the eleventh embodiment of the present invention, while Figures 48A to 48D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the eleventh embodiment. Referring first to Figure 47, the eleventh embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. In addition, in this embodiment, the aperture 0 is set between the third lens 3 and the fourth lens 4. The optical axis region 413 of the object side 41 of the fourth lens 4 is convex, and its circumferential region 414 is also convex. It should be noted that, for the sake of clear display, the labels of the optical axis region and the circumferential region, which are similar in shape to those of the first embodiment, are omitted in Figure 47.

[0183] In this embodiment, the optical lens 10 has only the six lenses mentioned above.

[0184] Detailed optical data for the optical lens 10 of the eleventh embodiment is shown in Figure 49. The effective focal length of the optical lens 10 in the eleventh embodiment is 2.874 mm, the half-angle of view is 55.000 degrees, the aperture value (Fno) is 2.400, the system length is 8.529 mm, and the maximum image height is 2.066 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of APL5014CL material, the second lens 2 is made of APL5014CL material, the third lens 3 is made of OKP1 material, the fourth lens 4 is made of APL5014CL material, the fifth lens 5 is made of APL5014CL material, and the sixth lens 6 is made of EP-9000 material, but the invention is not limited thereto.

[0185] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the eleventh embodiment are shown in Figure 50 in Formula (1).

[0186] Furthermore, the relationships between the important parameters in the optical lens 10 of the eleventh embodiment are shown in Figures 63 to 64 and 67.

[0187] As shown in Figure 48A, the longitudinal spherical aberration of this eleventh embodiment controls the point deviation of off-axis rays at different heights within ±12.00 micrometers. In the two field curvature aberration diagrams in Figures 48B and 44C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±100.00 micrometers. The distortion aberration diagram in Figure 48D shows that the distortion aberration of this eleventh embodiment is maintained within ±50%.

[0188] As can be seen from the above description, the distortion aberration of the eleventh embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the eleventh embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0189] Figure 51A is a cross-sectional schematic diagram of the optical lens of the twelfth embodiment of the present invention in the YZ plane; Figure 51B is a cross-sectional schematic diagram of the optical lens of the twelfth embodiment of the present invention in the XZ plane; Figures 52A to 52D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the twelfth embodiment in the YZ plane; and Figures 52E to 52H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the twelfth embodiment in the XZ plane. Referring first to Figures 51A and 51B, a twelfth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the aperture 0 is positioned between the third lens 3 and the fourth lens 4. The first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a positive refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The optical axis region 413 of the object-side surface 41 of the fourth lens 4 is convex, and its circumferential region 414 is also convex. The circumferential region 624 of the image-side surface 62 of the sixth lens 6 is concave. It should be noted that, for the sake of clear illustration, the labels of the optical axis region and circumferential region that are similar in shape to those in the first embodiment are omitted in Figures 51A and 51B.

[0190] In this embodiment, the optical lens 10 has only the six lenses mentioned above.

[0191] Detailed optical data for the optical lens 10 of the twelfth embodiment is shown in Figure 53. The effective focal length of the optical lens 10 of the twelfth embodiment is 2.592 mm, the half-angle of view (HFOVy) on the Y-axis is 55.000 degrees, the half-angle of view (HFOVx) on the X-axis is 55.000 degrees, the aperture (Fno) is 2.200, the system length is 7.680 mm, and the maximum image height is 2.067 mm. The material parameters of each component in the optical data of the embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of APL5014CL material, the second lens 2 is made of APL5014CL material, the third lens 3 is made of OKP1 material, the fourth lens 4 is made of APL5014CL material, the fifth lens 5 is made of APL5014CL material, and the sixth lens 6 is made of EP-9000 material, but the invention is not limited thereto.

[0192] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0193] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the twelfth embodiment are shown in Figure 54 in Formula (1).

[0194] Furthermore, the relationships between the important parameters in the optical lens 10 of the twelfth embodiment are shown in Figures 63 to 64 and 67.

[0195] As shown in Figures 52A and 52E, the longitudinal spherical aberration of this twelfth embodiment controls the point deviation of off-axis rays at different heights within ±30.00 micrometers. In the four field curvature aberration diagrams in Figures 52B and 52C, and Figures 52F and 52G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±120.00 micrometers. The distortion aberration diagrams in Figures 52D and 52H show that the distortion aberration of this twelfth embodiment is maintained within ±50%.

[0196] As can be seen from the above description, the distortion aberration of the twelfth embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the twelfth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0197] Figure 55A is a cross-sectional schematic diagram of the optical lens of the thirteenth embodiment of the present invention in the YZ plane; Figure 55B is a cross-sectional schematic diagram of the optical lens of the thirteenth embodiment of the present invention in the XZ plane; Figures 56A to 56D are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the thirteenth embodiment in the YZ plane; and Figures 56E to 56H are diagrams of longitudinal spherical aberration and various aberrations of the optical lens of the thirteenth embodiment in the XZ plane. Referring first to Figures 55A and 55B, the thirteenth embodiment of the optical lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the aperture 0 is set between the third lens 3 and the fourth lens 4. The first lens 1 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The second lens 2 has a negative refractive index in the Y-axis direction and a negative refractive index in the X-axis direction. The optical axis region 413 of the object-side surface 41 of the fourth lens 4 is convex, and its circumferential region 414 is also convex. The circumferential region 624 of the image-side surface 62 of the sixth lens 6 is concave. It should be noted that, for the sake of clear illustration, the labels of the optical axis region and circumferential region that are similar in shape to those in the first embodiment are omitted in Figures 55A and 55B.

[0198] In this embodiment, the optical lens 10 has only the six lenses mentioned above.

[0199] Detailed optical data for the optical lens 10 of the thirteenth embodiment is shown in Figure 57. The effective focal length of the optical lens 10 of the thirteenth embodiment is 2.472 mm, the half-angle of view (HFOVy) on the Y-axis is 55.000 degrees, the half-angle of view (HFOVx) on the X-axis is 55.000 degrees, the aperture (Fno) is 2.250, the system length is 10.941 mm, and the maximum image height is 2.066 mm. The material parameters of each component in the optical data of this embodiment adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can understand the specific material implementation. For example, the first lens 1 is made of APL5014CL material, the second lens 2 is made of APL5014CL material, the third lens 3 is made of OKP1 material, the fourth lens 4 is made of APL5014CL material, the fifth lens 5 is made of APL5014CL material, and the sixth lens 6 is made of EP-9000 material, but the invention is not limited thereto.

[0200] In this embodiment, the object side 11 and image side 12 of the first lens 1 are annular surfaces, and the object side 21 and image side 22 of the second lens 2 are annular surfaces, as defined by formulas (2) to (5).

[0201] The aspherical coefficients of the object side 31 of the third lens 3 to the image side 62 of the sixth lens 6 in the thirteenth embodiment are shown in Figure 58.

[0202] Furthermore, the relationships between the important parameters in the optical lens 10 of the thirteenth embodiment are shown in Figures 61 to 64 and Figure 67.

[0203] As shown in Figures 56A and 56E, the longitudinal spherical aberration of this thirteenth embodiment controls the point deviation of off-axis rays at different heights within ±25.00 micrometers. In the four field curvature aberration diagrams in Figures 56B and 56C, and Figures 56F and 56G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±120.00 micrometers. The distortion aberration diagrams in Figures 56D and 56H show that the distortion aberration of this thirteenth embodiment is maintained within ±45%.

[0204] As can be seen from the above description, the distortion aberration of the thirteenth embodiment is superior to that of the first embodiment. Furthermore, the thickness difference between the optical axis region and the circumferential region of the lens in the thirteenth embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield.

[0205] Referring in conjunction with Figures 59 to 67, which are tabular diagrams of the various optical parameters of the first to thirteenth embodiments described above.

[0206] In addition, in order to ensure optical quality and take into account the ease of manufacturing, the air gap between lenses or the lens thickness is adjusted to match the system focal length. The aperture value or image height is adjusted to maintain the light throughput and imaging requirements. If the numerical limits of the following condition formula are met, the optical lens 10 of the embodiment of the present invention can have a better configuration.

[0207] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: EFL / AAG≤1.700, wherein the preferred range is 0.350≤EFL / AAG≤1.700.

[0208] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: (EFL+BFL) / Tavg≤6.200, wherein the preferred range is 3.000≤(EFL+BFL) / Tavg≤6.200.

[0209] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: (EFL+BFL) / (AAG+Tmin)≤2.100, wherein the preferred range is 0.550≤(EFL+BFL) / (AAG+Tmin)≤2.100.

[0210] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: EFL / BFL≤2.900, wherein the preferred range is 1.100≤EFL / BFL≤2.900.

[0211] In the optical lens 10 of the embodiment of the present invention, the following conditional expression is more satisfied: Fno (BFL+AAG) / ImgH ≥ 2.300, where the preferred range is 2.300 ≤ Fno (BFL+AAG) / ImgH≤6.200.

[0212] In the optical lens 10 of the embodiment of the present invention, the following conditional expression is more satisfied: Fno EFL / AAG ≤ 3.700, where the preferred range is 0.800 ≤ Fno EFL / AAG≤3.700.

[0213] In the optical lens 10 of the embodiment of the present invention, the following conditional expression is more satisfied: Fno EFL / Tavg ≤ 8.600, where the preferred range is 3.900 ≤ Fno EFL / Tavg≤8.600.

[0214] In the optical lens 10 of the embodiment of the present invention, the following conditional expression is more satisfied: Fno (Tmax+Tmin) / Gavg≥4.800, where the preferred range is 4.800≤Fno (Tmax+Tmin) / Gavg≤17.000.

[0215] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: TTL / (Fno) ImgH)≥1.000, wherein the preferred range is 1.000≤TTL / (Fno) ImgH)≤2.700.

[0216] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: (T1+AAG) / ImgH≥0.650, wherein the preferred range is 0.650≤(T1+AAG) / ImgH≤3.600.

[0217] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: AAG / ImgH≥0.540, wherein the preferred range is 0.540≤AAG / ImgH≤2.300.

[0218] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: (BFL+AAG) / ImgH≥1.000, wherein the preferred range is 1.000≤(BFL+AAG) / ImgH≤2.800.

[0219] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: (EFL+ImgH) / BFL≤5.500, wherein the preferred range is 2.400≤(EFL+ImgH) / BFL≤5.500.

[0220] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: ImgH / BFL≤2.600, wherein the preferred range is 1.200≤ImgH / BFL≤2.600.

[0221] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: ImgH / Tavg≤5.500, wherein the preferred range is 1.800≤ImgH / Tavg≤5.500.

[0222] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: ImgH / (AAG+Tmin)≤1.600, wherein the preferred range is 0.400≤ImgH / (AAG+Tmin)≤1.600.

[0223] In the optical lens 10 of the embodiment of the present invention, the following condition is more satisfied: TTL / (ImgH+BFL)≥1.500, wherein the preferred range is 1.500≤TTL / (ImgH+BFL)≤3.800.

[0224] The exemplary limiting relationships listed above can be selectively combined and applied in varying numbers to embodiments of the present invention, and are not limited thereto. In implementing the present invention, in addition to the aforementioned relationships, further detailed structures such as the arrangement of concave and convex surfaces of individual lenses or, more broadly, multiple lenses can be designed to enhance control over system performance and / or resolution. It should be noted that these details should be selectively combined and applied to other embodiments of the present invention, provided there is no conflict.

[0225] In summary, the optical lenses of the embodiments of the present invention achieve the following effects and advantages: First, the longitudinal spherical aberration, field curvature aberration, and distortion of the various embodiments of the present invention all meet the usage specifications. Furthermore, off-axis rays of each representative wavelength at different heights are concentrated near the imaging point, and the skewing amplitude of each curve shows that the imaging point deviation of off-axis rays at different heights is controlled, resulting in excellent spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between each representative wavelength are also quite close, indicating that the present invention has excellent dispersion suppression capabilities due to its good concentration of different wavelengths of light under various conditions. In conclusion, the present invention, through the design and combination of the lenses, can produce excellent imaging quality.

[0226] II. In the optical lens of this embodiment of the invention, when there are only eight lenses, and the distance formed by the two points of the maximum straight-line distance formed by the outermost edge contour of the image-side full surface of the first lens and the maximum depth value of the image-side surface of the first lens on the maximum optical boundary satisfy the condition Dmax12 / Sag12≥7.500, a visual effect similar to that of the human eye can be achieved. Furthermore, using more lenses in an eight-lens group is beneficial for fine-tuning and correcting image quality. By adjusting the aperture value in conjunction with the ratio of the distance between the object-side surface of the first lens and the object-side surface of the third lens to the system focal length, the optical lens can satisfy Fno. When D11t31 / EFL ≥ 1.500, the third lens, with its negative refractive index, balances luminous flux and focal length, maintaining good image quality. Combining specific lens shapes, such as a convex circumferential region on the object side of the fifth lens, a convex axial region on the object side of the sixth lens, and a concave circumferential region on the object side of the sixth lens, can improve aberrations and distortion. Furthermore, further correcting spherical aberration can be achieved by using a convex axial region on the object side of the third lens, or a convex circumferential region on the object side of the third lens, or a concave axial region on the image side of the third lens. The optimal range for Dmax12 / Sag12 is 7.500 ≤ Dmax12 / Sag12 ≤ 13.500, Fno The optimal range for D11t31 / EFL is 1.500 ≤ Fno. D11t31 / EFL≤5.700.

[0227] Third, in addition to the conditions in point 2 above, when the optical lens of the present invention further satisfies that the eighth lens has a positive refractive index, the seventh lens has a negative refractive index, and the fifth lens has a positive refractive index, the optical quality can be further improved.

[0228] IV. Not limited to eight lenses, the optical lens of this invention may include six, seven, or eight lenses. When the distance formed by the two points of the maximum straight-line distance formed by the outermost edge contour of the entire image-side surface of the first lens and the maximum depth value of the image-side surface of the first lens on the optical maximum boundary satisfy the condition Dmax12 / Sag12≥7.500, a visual effect similar to that of the human eye can be achieved. When an eight-lens group is used to correct image quality, or when it is adjusted to six or seven lenses for lens miniaturization, system length reduction, or even for ease of production and simplified manufacturing process, and the aperture value is matched with the ratio of the distance between the object-side surface of the first lens to the object-side surface of the third lens to the system focal length, satisfying Fno When D11t31 / EFL ≥ 2.000, the third lens, with its negative refractive index, balances luminous flux and focal length, maintaining good image quality. Combining specific lens shapes—for example, a concave optical axis region on the image side of the second lens, a convex optical axis region on the object side of the fifth lens, a convex optical axis region on the object side of the sixth lens, and a concave circular region on the object side of the sixth lens—can improve aberrations and distortion. Furthermore, using a convex circular region on the object side of the third lens can further correct spherical aberration. The optimal range for Dmax12 / Sag12 is 7.500 ≤ Dmax12 / Sag12 ≤ 19.000, Fno The optimal range for D11t31 / EFL is 2.000 ≤ Fno. D11t31 / EFL≤8.700.

[0229] V. Not limited to eight lenses, the optical lens of this invention may include six, seven, or eight lenses. When the distance formed by the two points of the maximum straight-line distance formed by the outermost edge contour of the entire image-side surface of the first lens and the maximum depth value of the image-side surface of the first lens on the optical maximum boundary satisfy the condition Dmax12 / Sag12≥7.500, a visual effect similar to that of the human eye can be achieved. When an eight-lens group is used to correct image quality, or when it is adjusted to six or seven lenses for lens miniaturization, system length reduction, or even for ease of production and simplified manufacturing process, and the aperture value is matched with the ratio of the distance between the object-side surface of the first lens to the object-side surface of the third lens to the system focal length, satisfying Fno When D11t31 / EFL ≥ 2.000, the third lens, with its negative refractive index, balances luminous flux and focal length, maintaining good image quality. Combining specific lens shapes—for example, a concave optical axis region on the image side of the second lens, a convex optical axis region on the object side of the fifth lens, a convex optical axis region on the object side of the sixth lens, and a concave circular region on the object side of the sixth lens—can improve aberrations and distortion. Furthermore, using a concave circular region on the image side of the third lens can further correct spherical aberration. The optimal range for Dmax12 / Sag12 is 7.500 ≤ Dmax12 / Sag12 ≤ 19.000, Fno The optimal range for D11t31 / EFL is 2.000 ≤ Fno. D11t31 / EFL≤8.700.

[0230] VI. In addition to the conditions in points four or five above, when the optical lens of the embodiment of the present invention further satisfies that the fifth lens has a positive refractive index, the optical quality can be further improved.

[0231] In addition, any combination of parameters in the alternative embodiments can be selected to increase lens constraints, thereby facilitating lens design with the same architecture as the present invention.

[0232] Given the unpredictability of optical system design, under the framework of this invention, meeting the above-mentioned conditions can better shorten the system length, achieve a small aperture value, provide excellent image quality, or improve assembly yield, thus overcoming the shortcomings of prior art. Furthermore, the lens in this embodiment is made of plastic, which further reduces lens weight and saves costs.

[0233] The numerical ranges, including the maximum and minimum values, obtained from the combination ratios of optical parameters disclosed in the various embodiments of the present invention can all be implemented accordingly.

[0234] The contents disclosed in the various embodiments of the present invention include, but are not limited to, optical parameters such as focal length, lens thickness, and Vd Abbe number. For example, the present invention discloses an optical parameter A and an optical parameter B in various embodiments. The specific explanations of the range covered by these optical parameters, the comparison relationship between the optical parameters, and the conditional range covered by multiple embodiments are as follows: (1) The range covered by the optical parameter, for example: α2≦A≦α1 or β2≦B≦β1, where α1 is the maximum value of optical parameter A in multiple embodiments, α2 is the minimum value of optical parameter A in multiple embodiments, β1 is the maximum value of optical parameter B in multiple embodiments, and β2 is the minimum value of optical parameter B in multiple embodiments.

[0235] (2) Comparison of optical parameters, for example: A is greater than B or A is less than B.

[0236] (3) The conditional range covered by multiple embodiments, specifically, the combination or proportional relationships obtained by possible calculations of a plurality of optical parameters of the same embodiment, defined as E. E may be, for example: A+B, AB, A / B, or A... B or (A) B) 1 / 2 E satisfies the condition E≦γ1 or E≧γ2 or γ2≦E≦γ1, where γ1 and γ2 are the values ​​obtained by calculation of optical parameter A and optical parameter B in the same embodiment, and γ1 is the maximum value in multiple embodiments of the present invention, and γ2 is the minimum value in multiple embodiments of the present invention.

[0237] The range covered by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum, minimum, and numerical ranges within these conditions are all features upon which the present invention can be implemented, and all fall within the scope disclosed in the present invention. The above are merely illustrative examples and should not be construed as limiting.

[0238] All embodiments of the present invention are feasible, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, these feature combinations can achieve unexpected effects. These feature combinations include, but are not limited to, combinations of features such as surface shape, refractive index, and conditional features. The disclosure of the embodiments of the present invention is a specific example to illustrate the principles of the present invention and should not be limited to the disclosed embodiments. Furthermore, the embodiments and their accompanying drawings are only for illustrative purposes and are not limited thereto.

[0239] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An optical lens comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, an eighth lens, a seventh lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through; the first lens is the first lens counted from the object side to the image side; the second lens is the second lens counted from the object side to the image side; the third lens... The third lens is the third lens counting from the object side to the image side. This third lens has a negative refractive index and a convex optical axis region on the object side of the third lens, or a convex circular region on the object side of the third lens, or a concave optical axis region on the image side of the third lens, or a concave circular region on the image side of the third lens; the fourth lens is the fourth lens counting from the object side to the image side; the eighth lens is the fourth lens counting from the image side to the object side, and the eighth lens has a positive refractive index; the seventh lens... The seventh lens is the third lens counting from the image side to the object side, and has a negative refractive index; the fifth lens is the second lens counting from the image side to the object side, has a positive refractive index, and a convex circumferential region on the object side of the fifth lens; the sixth lens is the first lens counting from the image side to the object side, and a convex optical axis region on the object side of the sixth lens and a concave circumferential region on the object side of the sixth lens; wherein the optical lens has only the above eight lenses, and satisfies Dm ax12 / Sag12≥7.500 and Fno*D11t31 / EFL≥1.500, where Dmax12 is the distance between the two points formed by the maximum straight-line distance formed by the outermost edge contour of the entire image-side surface of the first lens, Sag12 is the Sag value of the image-side surface of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object-side surface of the first lens to the object-side surface of the third lens, and EFL is the effective focal length of the optical lens.

2. An optical lens comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through; the first lens is the first lens counted from the object side to the image side; the second lens is the second lens counted from the object side to the image side, and a region along the optical axis of the image-side surface of the second lens is concave; the third lens is the third lens counted from the object side to the image side, the third lens having a negative refractive index and a circumferential region of the object-side surface of the third lens being convex; the fifth lens is the second lens counted from the image side to the object side, the fifth lens having a positive refractive index and a region along the optical axis of the image-side surface of the fifth lens being convex; and the fifth lens is the second lens counted from the image side to the object side, the fifth lens having a positive refractive index and a region along the optical axis of the image-side surface of the fifth lens being convex. The optical axis region on the object side of the first lens is convex; the sixth lens is the first lens counted from the image side to the object side, the optical axis region on the object side of the sixth lens is convex and the circumferential region on the object side of the sixth lens is concave; the total number of lenses in the optical lens does not exceed eight, and satisfies Dmax12 / Sag12≥7.500 and Fno*D11t31 / EFL≥2.000, where Dmax12 is the distance formed by the two points of the maximum straight-line distance formed by the outermost edge contour of the entire surface of the image side of the first lens, Sag12 is the Sag value of the image side of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object side of the first lens to the object side of the third lens, and EFL is the effective focal length of the optical lens.

3. An optical lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes an object-side surface facing the object side and allowing light to pass through, and an image-side surface facing the image side and allowing light to pass through; the first lens is the first lens counted from the object side to the image side; the second lens is the second lens counted from the object side to the image side, and a region along the optical axis of the image-side surface of the second lens is concave; the third lens is the third lens counted from the object side to the image side, the third lens having a negative refractive index and a circumferential region of the image-side surface of the third lens being concave; the fifth lens is the second lens counted from the image side to the object side, the fifth lens having a positive refractive index and a region along the optical axis of the image-side surface of the fifth lens being concave; The optical axis region on the object side of the first lens is convex; the sixth lens is the first lens counted from the image side to the object side, the optical axis region on the object side of the sixth lens is convex and the circumferential region on the object side of the sixth lens is concave; the total number of lenses in the optical lens does not exceed eight, and satisfies Dmax12 / Sag12≥7.500 and Fno*D11t31 / EFL≥2.000, where Dmax12 is the distance formed by the two points of the maximum straight-line distance formed by the outermost edge contour of the entire surface of the image side of the first lens, Sag12 is the Sag value of the image side of the first lens at the maximum optical boundary, Fno is the aperture value of the optical lens, D11t31 is the distance from the object side of the first lens to the object side of the third lens, and EFL is the effective focal length of the optical lens.

4. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: EFL / AAG ≤ 1.700, where AAG is the sum of all air gaps of the first lens to the sixth lens on the optical axis.

5. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: (EFL+BFL) / Tavg≤6.200, where BFL is the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis, and Tavg is the average value of the thicknesses of all lenses from the first lens to the sixth lens on the optical axis.

6. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: (EFL+BFL) / (AAG+Tmin)≤2.100, where BFL is the distance from the image side surface of the sixth lens to the imaging surface on the optical axis, AAG is the sum of all air gaps of the first lens to the sixth lens on the optical axis, and Tmin is the minimum value of the lens thickness of the first lens to the sixth lens on the optical axis.

7. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: EFL / BFL ≤ 2.900, where BFL is the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis.

8. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: Fno*(BFL+AAG) / ImgH≥2.300, where BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis, AAG is the sum of all air gaps from the first lens to the sixth lens on the optical axis, and ImgH is the maximum image height of the optical lens.

9. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: Fno*EFL / AAG≤3.700, where AAG is the sum of all air gaps of the first lens to the sixth lens on the optical axis.

10. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: Fno*EFL / Tavg≤8.600, where Tavg is the average thickness of all lenses from the first lens to the sixth lens on the optical axis.

11. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: Fno*(Tmax+Tmin) / Gavg≥4.800, where Tmax is the maximum value of the lens thickness of the first lens to the sixth lens on the optical axis, Tmin is the minimum value of the lens thickness of the first lens to the sixth lens on the optical axis, and Gavg is the average value of all air gaps of the first lens to the sixth lens on the optical axis.

12. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: TTL / (Fno*ImgH)≥1.000, where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, and ImgH is the maximum image height of the optical lens.

13. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: (T1+AAG) / ImgH≥0.650, where T1 is the thickness of the first lens on the optical axis, AAG is the sum of all air gaps between the first lens and the sixth lens on the optical axis, and ImgH is the maximum image height of the optical lens.

14. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: AAG / ImgH≥0.540, where AAG is the sum of all air gaps of the first lens to the sixth lens on the optical axis, and ImgH is the maximum image height of the optical lens.

15. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: (BFL+AAG) / ImgH≥1.000, where BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis, AAG is the sum of all air gaps from the first lens to the sixth lens on the optical axis, and ImgH is the maximum image height of the optical lens.

16. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: (EFL+ImgH) / BFL≤5.500, where ImgH is the maximum image height of the optical lens, and BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis.

17. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: ImgH / BFL≤2.600, where ImgH is the maximum image height of the optical lens, and BFL is the distance from the image side of the sixth lens to the imaging plane on the optical axis.

18. The optical lens as claimed in any one of claims 1-3, wherein the optical lens further satisfies the following condition: ImgH / Tavg≤5.500, where ImgH is the maximum image height of the optical lens, and Tavg is the average value of the thicknesses of all lenses from the first lens to the sixth lens on the optical axis.

19. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: ImgH / (AAG+Tmin)≤1.600, where ImgH is the maximum image height of the optical lens, AAG is the sum of all air gaps of the first lens to the sixth lens on the optical axis, and Tmin is the minimum of the lens thicknesses of the first lens to the sixth lens on the optical axis.

20. The optical lens according to any one of claims 1-3, wherein the optical lens further satisfies the following condition: TTL / (ImgH+BFL)≥1.500, where TTL is the distance from the object-side surface of the first lens to the imaging surface on the optical axis, ImgH is the maximum image height of the optical lens, and BFL is the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis.

Images