Optical lens

Abstract

The invention provides an optical lens comprising a first lens to a fifth lens. The second lens has a positive refractive index, the circumferential area of the image side surface of the second lens is a concave surface, the third lens has a positive refractive index, the circumferential area of the object side surface of the third lens is a concave surface, and the circumferential area of the image side surface of the fourth lens is a convex surface. The optical lens only comprises five lenses, and meets the conditions that Dmax12 / Sag12 is greater than or equal to 15.500 and f1 / Gmax is greater than or equal to 88.000.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical lens. In particular, the present application is directed to an optical lens mainly used for taking images and videos, and applied in portable electronic products, such as mobile phones, earphones, cameras, tablet computers, personal digital assistants (PDA), or head-mounted displays (AR, VR, MR) and the like electronic devices. BACKGROUND

[0002] In recent years, optical lenses have evolved and are applied in a wider range of environments. In addition to taking images and videos, they are also used in environmental monitoring, driving record photography, virtual reality (VR) tracking, and facial recognition. In addition to being thin and small, a large field of view is also a trend. Therefore, how to design an optical lens that is resistant to wear and tear, thin and small, has a large field of view, and has good optical quality, while also considering product design, has become a problem that must be addressed and solved. SUMMARY

[0003] Therefore, embodiments of the present application provide a five-piece optical lens that is resistant to wear and tear, thin and small, has a large field of view, and has good imaging quality and is technically feasible. The five-piece optical lens of the present application has, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged on the optical axis. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens each have an object side surface facing the object side and allowing imaging light to pass through, and an image side surface facing the image side and allowing imaging light to pass through.

[0004] In an embodiment of the present application, the circumferential region of the image side surface of the second lens is concave, the third lens has a positive refractive power, the circumferential region of the object side surface of the third lens is concave, and the circumferential region of the image side surface of the fourth lens is convex. The optical lens has only the above-mentioned five lenses, and satisfies Dmax12 / Sag12≧15.500 and |f1| / Gmax≧88.000.

[0005] In another embodiment of the present application, the circumferential region of the image side surface of the second lens is concave, the third lens has a positive refractive power, the circumferential region of the object side surface of the third lens is concave, and the circumferential region of the image side surface of the fourth lens is convex. The optical lens has only the above-mentioned five lenses, and satisfies Dmax12 / Dmax21≧2.000 and |f1| / Gmax≧88.000.

[0006] In yet another embodiment of the present application, the optical axis region of the image side surface of the second lens is concave, the third lens has positive refractive power, the peripheral region of the object side surface of the third lens is concave, and the peripheral region of the image side surface of the fourth lens is convex. The optical lens has only the above-mentioned five lenses, and satisfies Dmax12 / Dmax21≧2.000, |f1| / Gmax≧88.000.

[0007] In the optical lens of the present application, each embodiment can also optionally satisfy the following conditions:

[0008] |f1| / Tmax≧9.000;

[0009] (EFL+T1) / EFL2t5≧1.000;

[0010] HFOV / D21t31≧70.000;

[0011] TL / ImgH≧2.500;

[0012] D11t21 / D31t41≧1.700;

[0013] TTL / D42t52≧9.700;

[0014] Fno / AAG*(T3+T4)≧1.700;

[0015] ALT / EFL≧1.900;

[0016] Fno*D11t21 / BFL≧1.750;

[0017] D21t52 / D11t21≦3.100;

[0018] D21t52 / |EFL2t5|≧1.500;

[0019] HFOV / ALT≧15.000;

[0020] (ImgH+BFL) / D11t21≦2.800;

[0021] TTL / (T2+T3+T4)≧3.500;

[0022] (D11t21+G34) / EFL2t5≦2.000;

[0023] D12t31 / AAG≧1.350;

[0024] TL / D41t52≧2.750.

[0025] Tmax = max (T1, T2, T3, T4, T5) G34 = T3 + T4 Gmax = max (G1, G2, G3, G4, G5)

[0026] D21t31 = D21 + D31 D11t21 = D11 + D21 D31t41 = D31 + D41 D42t52 = D42 + D52 D21t52 = D21 + D52 D12t31 = D12 + D31 D41t52 = D41 + D52 Dmax12 = max (D12, D13, D14, D15) Dmax21 = max (D21, D23, D24, D25) Sag12 = Sag (D12, D13, D14, D15) Sag21 = Sag (D21, D23, D24, D25)

[0027] ALT = T1 + T2 + T3 + T4 + T5 TL = D11 + D21 + D31 + D41 + D52 TTL = D11 + D21 + D31 + D41 + D52 + D53 BFL = D52 + D53 AAG = G1 + G2 + G3 + G4 EFL = EFL1 + EFL2t5 f1 = Focal length of the first lens ImgH = Image height of the optical lens HFOV = Half field of view of the optical lens Fno = F-number of the optical lens BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Schematic diagram illustrating the method for judging curvature shape of the optical lens Figure 1 ;

[0029] Figure 2 Schematic diagram illustrating the method for judging curvature shape of the optical lens Figure 2 ;

[0030] Figure 3 Schematic diagram illustrating the method for judging curvature shape of the optical lens Figure 3 ;

[0031] Figure 4 Schematic diagram illustrating the method for judging curvature shape of optical lens of the present application Figure 4 ;

[0032] Figure 5 Schematic diagram illustrating the method for judging curvature shape of optical lens of the present application Figure 5 ;

[0033] Figure 6A Schematic diagram illustrating the round lens of optical lens of the present application

[0034] Figure 6B Schematic diagram illustrating the cut edge lens of optical lens of the present application

[0035] Figure 6C Schematic diagram illustrating the lens with sprue or assembly part of optical lens of the present application

[0036] Figure 6D Schematic diagram illustrating the irregular profile lens of optical lens of the present application

[0037] Figure 7 Schematic diagram illustrating the first embodiment of optical lens of the present application

[0038] Figure 8 Schematic diagram illustrating the parameter diagram of the first embodiment of optical lens of the present application; wherein A is the longitudinal spherical aberration on the imaging surface; B is the sagittal field curvature aberration; C is the tangential field curvature aberration; D is the distortion aberration

[0039] Figure 9 Schematic diagram illustrating the second embodiment of optical lens of the present application

[0040] Figure 10 Schematic diagram illustrating the parameter diagram of the second embodiment of optical lens of the present application; wherein A is the longitudinal spherical aberration on the imaging surface; B is the sagittal field curvature aberration; C is the tangential field curvature aberration; D is the distortion aberration

[0041] Figure 11 Schematic diagram illustrating the third embodiment of optical lens of the present application

[0042] Figure 12 Schematic diagram illustrating the parameter diagram of the third embodiment of optical lens of the present application; wherein A is the longitudinal spherical aberration on the imaging surface; B is the sagittal field curvature aberration; C is the tangential field curvature aberration; D is the distortion aberration

[0043] Figure 13 Schematic diagram illustrating the fourth embodiment of optical lens of the present application

[0044] Figure 14A schematic view of a seventh embodiment of the optical lens of the present application is shown in FIG. 7;

[0045] Figure 15 A schematic view of a fifth embodiment of the optical lens of the present application is shown in FIG. 5;

[0046] Figure 16 A schematic view of a fifth embodiment of the optical lens of the present application is shown in FIG. 5;

[0047] Figure 17 A schematic view of a sixth embodiment of the optical lens of the present application is shown in FIG. 6;

[0048] Figure 18 A schematic view of a sixth embodiment of the optical lens of the present application is shown in FIG. 6;

[0049] Figure 19 A schematic view of a seventh embodiment of the optical lens of the present application is shown in FIG. 7;

[0050] Figure 20 A schematic view of a seventh embodiment of the optical lens of the present application is shown in FIG. 7;

[0051] Figure 21 Optical data of the first embodiment is shown in Table 1 below:

[0052] Figure 22 Aspheric surface data of the first embodiment is shown in Table 2 below:

[0053] Figure 23 Optical data of the second embodiment is shown in Table 3 below:

[0054] Figure 24 Aspheric surface data of the second embodiment is shown in Table 4 below:

[0055] Figure 25 Optical data of the third embodiment is shown in Table 5 below:

[0056] Figure 26 Aspheric surface data of the third embodiment is shown in Table 6 below:

[0057] Figure 27 Optical data of the fourth embodiment is shown in Table 7 below:

[0058] Figure 28Optical data of the fourth embodiment in detail

[0059] Figure 29 Optical data of the fifth embodiment in detail

[0060] Figure 30 Aspherical surface data of the fifth embodiment in detail

[0061] Figure 31 Optical data of the sixth embodiment in detail

[0062] Figure 32 Aspherical surface data of the sixth embodiment in detail

[0063] Figure 33 Optical data of the seventh embodiment in detail

[0064] Figure 34 Aspherical surface data of the seventh embodiment in detail

[0065] Figure 35 Important parameters of the embodiments

[0066] Figure 36 Important parameters of the embodiments

[0067] Figure 37 Important parameters of the embodiments

[0068] Reference signs:

[0069] 1 optical lens; 2 aperture; 3 filter; 4 image plane

[0070] 11, 21, 31, 41, 51 object side surface

[0071] 12, 22, 32, 42, 52 image side surface

[0072] 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, Z1 optical axis region

[0073] 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, Z2 circumferential region

[0074] 10 first lens; 20 second lens; 30 third lens

[0075] 40 fourth lens; 50 fifth lens

[0076] 100, 200, 300, 400, 500 lens

[0077] 130 assembly; 211, 212 parallel rays; Al object side;

[0078] A2 image side; I optical axis; CP center point; CP1 first center point;

[0079] CP2 second center point; OB optical boundary; Lc chief ray;

[0080] Lm marginal ray; TP1 first turning point; TP2 second turning point;

[0081] Z3 relay region; EL extension line; M, R intersection; Dmax distance. DETAILED DESCRIPTION

[0082] As used in the specification and claims of this application, the terms "optical axis region", "circumferential region", "concave surface", and "convex surface" should be construed in accordance with the definitions set forth in this specification.

[0083] An optical system of the present specification includes at least one lens that receives an imaging ray of an incident optical system that is parallel to an optical axis within an angle of half field of view (HFOV) with respect to the optical axis. The imaging ray is imaged on an image plane by the optical system. By "a lens has positive (or negative) refractive power", it is meant that the paraxial refractive power of the lens calculated by Gaussian optics theory is positive (or negative). By "object side surface (or image side surface) of a lens" is defined as a specific range of a lens surface through which the imaging ray passes. The imaging ray includes at least two types of rays: a chief ray Lc and a marginal ray Lm (as shown in Figure 1 The object side surface (or image side surface) of a lens can be divided into different regions depending on different positions, including an optical axis region, a circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0084] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a turning point. The center point of the lens surface is an intersection of the surface and the optical axis I. As shown in Figure 1The first center point CP1 is located on the object side surface 110 of the lens 100, and the second center point CP2 is located on the image side surface 120 of the lens 100. A turning point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as a point where the radially outermost marginal ray Lm intersects the lens surface. All turning points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the lens 100 surface can have no turning point or at least one turning point. If a single lens surface has multiple turning points, the turning points are sequentially named from the first turning point in the radially outward direction. For example, the first turning point TP1 (closest to the optical axis I), the second turning point TP2 (as shown in Figure 4 ), and the Nth turning point (farthest from the optical axis I).

[0085] When the lens surface has at least one turning point, the range from the center point to the first turning point TP1 is defined as the optical axis region, wherein the optical axis region includes the center point. The region radially outward from the turning point farthest from the optical axis I (the Nth turning point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region between the optical axis region and the circumferential region can also be included, and the number of relay regions depends on the number of turning points. When the lens surface has no turning point, the distance from the optical axis I to the optical boundary OB of the lens surface is defined as 0% to 50% as the optical axis region, and the distance from the optical axis I to the optical boundary OB of the lens surface is defined as 50% to 100% as the circumferential region.

[0086] When parallel light rays along the optical axis I pass through a region, if the light rays are deflected towards the optical axis I and the intersection point with the optical axis I is located on the lens image side A2, then the region is convex. When parallel light rays along the optical axis I pass through a region, if the extension of the light rays intersects the optical axis I at a point located on the lens object side Al, then the region is concave.

[0087] In addition, referring to Figure 1 , the lens 100 can also include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used to assemble the lens 100 to a corresponding element (not shown) of an optical system. Imaging light rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are only examples for illustrating the present application, and do not limit the scope of the present application. The assembly portion 130 of the following discussed lenses can be partially or entirely omitted in the drawings.

[0088] Referring to Figure 2 , the center point CP and the first turning point TP1 are defined as the optical axis region Z1. The first turning point TP1 and the optical boundary OB of the lens surface are defined as the circumferential region Z2. As Figure 2As shown, the parallel light ray 211 intersects the optical axis I at the image side A2 of the lens 200 after passing through the optical axis region Zl, i.e. the focal point of the parallel light ray 211 passing through the optical axis region Zl is located at the R point of the image side A2 of the lens 200. Since the light ray intersects the optical axis I at the image side A2 of the lens 200, the optical axis region Zl is convex. Conversely, the parallel light ray 212 diverges after passing through the circumferential region Z2. As shown, Figure 2 As shown, the extension line EL of the parallel light ray 212 intersects the optical axis I at the object side Al of the lens 200 after passing through the circumferential region Z2, i.e. the focal point of the parallel light ray 212 passing through the circumferential region Z2 is located at the M point of the object side Al of the lens 200. Since the extension line EL of the light ray intersects the optical axis I at the object side Al of the lens 200, the circumferential region Z2 is concave. Figure 2 As shown in the lens 200, the first transition point TP1 is the boundary between the optical axis region and the circumferential region, i.e. the first transition point TP1 is the boundary point between the convex and the concave.

[0089] On the other hand, the convexity and concavity of the surface shape of the optical axis region can also be determined by the judgment method of those skilled in the art, i.e. by the sign of the radius of curvature (abbreviated as R value) of the paraxial ray to determine the convexity and concavity of the surface shape of the optical axis region of the lens. The R value is commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of the optical design software. In terms of the object side surface, when the R value is positive, it is determined that the optical axis region of the object side surface is convex; when the R value is negative, it is determined that the optical axis region of the object side surface is concave. Conversely, in terms of the image side surface, when the R value is positive, it is determined that the optical axis region of the image side surface is concave; when the R value is negative, it is determined that the optical axis region of the image side surface is convex. The results of this method are consistent with the results of the aforementioned determination method by the intersection of the light ray / extension line of the light ray and the optical axis, i.e. the determination method of the focal point of a parallel light ray with the optical axis located at the object side or the image side of the lens to determine the convexity and concavity of the surface shape. The "a region is convex (or concave)", "a region is convex (or concave)", or "a convex (or concave) region" described in this specification can be used interchangeably.

[0090] Figures 3 to 5 Examples of determining the surface shape of the regions and the boundary of the regions in various cases are provided, including the aforementioned optical axis region, circumferential region, and relay region.

[0091] Figure 3 Fig. 4 is a radial cross-sectional view of the lens 300. Referring to Figure 3 , there is only one transition point TP1 in the optical boundary OB of the image side surface 320 of the lens 300. The optical axis region Zl and the circumferential region Z2 of the image side surface 320 of the lens 300 are as shown in Figure 3 . The R value of this image side surface 320 is positive (i.e. R > 0), therefore, the optical axis region Zl is concave.

[0092] Generally, each region of surface shape bounded by a transition point is opposite to the adjacent region of surface shape, and thus the transition point can be used to define the transition of surface shape, i.e., the surface shape changes from concave to convex or from convex to concave at the transition point. Figure 3 In the embodiment shown in FIG. 4, the optical axis region Zl is convex, the surface shape changes at the transition point TP1, and thus the circumferential region Z2 is concave.

[0093] Figure 4 FIG. 5 is a radial sectional view of a lens 500. As shown in FIG. 5, the object side surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, the 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and the 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region. Figure 4 As shown in FIG. 5, the optical axis region Zl of the object side surface 510 of the lens 500 is defined as the 50% of the distance from the optical axis I to the optical boundary OB of the lens 500. The R value of the object side surface 510 is positive (i.e., R > 0), and thus the optical axis region Zl is convex. Since the object side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object side surface 510 is also convex. The lens 500 can further have an assembling portion (not shown) extending radially outward from the circumferential region Z2.

[0094] The circumferential region Z2 of the object side surface 510 of the lens 500 is also convex. The lens 500 can further have an assembling portion (not shown) extending radially outward from the circumferential region Z2. Figure 4 As shown in FIG. 5, the object side surface 510 of the lens 500 sequentially includes, from the optical axis I radially outward, the optical axis region Zl between the optical axis I and the transition point TP1, the circumferential region Z2 between the transition point TP1 and the optical boundary OB of the object side surface 510 of the lens 500, and the optical axis region Zl between the transition point TP1 and the optical boundary OB of the object side surface 510 of the lens 500. Since the optical axis region Zl is convex, the surface shape changes at the transition point TP1 and thus the circumferential region Z2 is concave, and since the surface shape changes at the transition point TP1 again and thus the optical axis region Zl is convex, the circumferential region Z2 is also convex.

[0095] Figure 5 FIG. 5 is a radial sectional view of a lens 500. As shown in FIG. 5, the object side surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, the 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and the 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region. Figure 5 As shown in FIG. 5, the optical axis region Zl of the object side surface 510 of the lens 500 is defined as the 50% of the distance from the optical axis I to the optical boundary OB of the lens 500. The R value of the object side surface 510 is positive (i.e., R > 0), and thus the optical axis region Zl is convex. Since the object side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object side surface 510 is also convex. The lens 500 can further have an assembling portion (not shown) extending radially outward from the circumferential region Z2.

[0096] See also Figure 1 and Figures 6A to 6D In different embodiments, the lens 100 comprises an object-side total surface and an image-side total surface, wherein the object-side total surface is all surfaces of the lens facing the object side, and the image-side total surface is all surfaces of the lens facing the image side. Specifically, the object-side total surface is composed of the object-side surface 110 and the object-side non-optical surface, and the image-side total surface is composed of the image-side surface 120 and the image-side non-optical surface. In other words, the object-side non-optical surface can be defined as a surface of the lens 100 extending radially outward from the optical boundary OB and facing the object side Al, and the image-side non-optical surface can be defined as a surface of the lens 100 extending radially outward from the optical boundary OB and facing the image side A2, which is designed as an assembly structure, an extended lens outer contour structure, or a modified lens shape, such as a fitting conical surface, a resting flat surface, an ink coating light shielding portion, or an assembly portion 130, as needed, but the present application is not limited thereto. In different types of lenses, the size of the object-side total surface or the image-side total surface varies according to the actual shape of the lens, so it can be further defined that the distance between the two points formed by the outermost contour of the object-side total surface or the image-side total surface of the lens, which forms the maximum straight line distance, is Dmax, as shown in Figure 6A a circular lens as shown, Figure 6B a cut-edge lens as shown, Figure 6C a lens with a gate or assembly portion as shown, and Figure 6D an irregular contour lens as shown. In other words, this distance Dmax is the maximum size length of the object-side total surface or the image-side total surface of the lens. In actual operation, it can be obtained by placing the lens flat on a platform and measuring by capturing an optical image of the object-side total surface or the image-side total surface, but the present application is not limited thereto.

[0097] As shown in Figure 7 , the optical lens 1 of the present application, from the object side Al where an object (not shown) is placed to the image side A2 where an image is formed, along the optical axis I, is mainly composed of five lenses, in order, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the image plane 4. Generally, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, and the fifth lens 50 can be made of transparent plastic material, but the present application is not limited thereto. Each lens has an appropriate refractive power. In the optical lens 1 of the present application, the lenses with refractive power are only the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, and the fifth lens 50. The optical axis I is the optical axis of the entire optical lens 1, so the optical axis of each lens and the optical axis of the optical lens 1 are the same.

[0098] In addition, the optical lens 1 further comprises an aperture stop 2, which is arranged at a proper position. Figure 7 In the embodiment, the aperture stop 2 is arranged on the side of the third lens 30 facing the object side Al, i.e. between the second lens 20 and the third lens 30. When the light (not shown) emitted by the object (not shown) to be photographed on the object side Al enters the optical lens 1 of the present application, it will sequentially pass through the first lens 10, the second lens 20, the aperture stop 2, the third lens 30, the fourth lens 40, the fifth lens 50 and the filter 3, and then focus on the imaging surface 4 on the image side A2 to form a clear image. In the embodiments of the present application, the filter 3 is arranged between the fifth lens 50 and the imaging surface 4, which can be a filter with various suitable functions, such as an infrared cut-off filter, which is used to prevent infrared rays in the imaging light from reaching the imaging surface 4 and affecting the imaging quality.

[0099] Each lens in the optical lens 1 of the present application has an object side surface facing the object side Al and passing the imaging light, and an image side surface facing the image side A2 and passing the imaging light. In addition, each lens in the optical lens 1 of the present application also has an optical axis region and a circumferential region. For example, the first lens 10 has an object side surface 11 and an image side surface 12; the second lens 20 has an object side surface 21 and an image side surface 22; the third lens 30 has an object side surface 31 and an image side surface 32; the fourth lens 40 has an object side surface 41 and an image side surface 42; and the fifth lens 50 has an object side surface 51 and an image side surface 52. Each object side surface and each image side surface also has an optical axis region and a circumferential region.

[0100] Each lens in the optical lens 1 of the present application also has a thickness T located on the optical axis I. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, and the fifth lens 50 has a fifth lens thickness T5. ALT is the sum of the thicknesses of the first lens 10, the second lens 20, the third lens 30, the fourth lens 40 and the fifth lens 50 on the optical axis I in the optical lens 1 of the present application. That is, ALT = T1 + T2 + T3 + T4 + T5; Tmax is the maximum value of the five lens thicknesses T1, T2, T3, T4 and T5 on the optical axis I of the first lens 10 to the fifth lens 50.

[0101] In addition, in the optical lens 1 of the present application, there are air gaps on the optical axis I between each pair of lenses. For example, the air gap between the first lens 10 and the second lens 20 is referred to as G12, the air gap between the second lens 20 and the third lens 30 is referred to as G23, the air gap between the third lens 30 and the fourth lens 40 is referred to as G34, and the air gap between the fourth lens 40 and the fifth lens 50 is referred to as G45. Gmax is the maximum value of the four air gaps on the optical axis I of the first lens 10 to the fifth lens 50, i.e., the maximum value of G12, G23, G34, and G45. Therefore, the sum of the distances of the four air gaps between each pair of lenses on the optical axis I from the first lens 10 to the fifth lens 50 is referred to as AAG, i.e., AAG = G12 + G23 + G34 + G45; and Gavg is the average value of the four air gaps on the optical axis I of the first lens 10 to the fifth lens 50, i.e., the average value of G12, G23, G34, and G45.

[0102] The distance on the optical axis I from the object side 11 of the first lens 10 to the imaging surface 4 is the system length TTL of the optical lens 1. The effective focal length of the optical lens 1 is EFL, EFL2t5 is the effective focal length of the second lens 20 to the fifth lens 50 of the optical lens 1, the distance on the optical axis I from the object side 11 of the first lens 10 to the image side 52 of the fifth lens 50 is TL. HFOV is the half field of view of the optical lens 1, i.e., half of the maximum field of view, ImgH is the image height of the optical lens 1, and Fno is the aperture value of the optical lens 1.

[0103] When the filter 3 is arranged between the fifth lens 50 and the imaging surface 4, G5F represents the air gap on the optical axis I from the fifth lens 50 to the filter 3, TF represents the thickness of the filter 3 on the optical axis I, GFP represents the air gap on the optical axis I from the filter 3 to the imaging surface 4, and BFL is the back focal length of the optical lens 1, i.e., the distance on the optical axis I from the image side 52 of the fifth lens 50 to the imaging surface 4, i.e., BFL = G5F + TF + GFP.

[0104] D21t31 is the distance on the optical axis I from the object side surface 21 of the second lens 20 to the object side surface 31 of the third lens 30, i.e. the sum of T2, G23; D11t21 is the distance on the optical axis I from the object side surface 11 of the first lens 10 to the object side surface 21 of the second lens 20, i.e. the sum of T1, G12; D31t41 is the distance on the optical axis I from the object side surface 31 of the third lens 30 to the object side surface 41 of the fourth lens 40, i.e. the sum of T3, G34; D42t52 is the distance on the optical axis I from the image side surface 42 of the fourth lens 40 to the image side surface 52 of the fifth lens 50, i.e. the sum of G45, T5; D21t52 is the distance on the optical axis I from the object side surface 21 of the second lens 20 to the image side surface 52 of the fifth lens 50, i.e. the sum of T2, G23, T3, G34, T4, G45, T5; D12t31 is the distance on the optical axis I from the image side surface 12 of the first lens 10 to the object side surface 31 of the third lens 30, i.e. the sum of G12, T2, G23; D41t52 is the distance on the optical axis I from the object side surface 41 of the fourth lens 40 to the image side surface 52 of the fifth lens 50, i.e. the sum of T4, G45, T5; Dmax12 is the distance between the two points in the outermost contour of the image side full surface 12 of the first lens 10 that form the largest straight-line distance; Dmax21 is the distance between the two points in the outermost contour of the object side full surface 21 of the second lens 20 that form the largest straight-line distance; Sag12 is the Sag value of the optical boundary of the image side surface 12 of the first lens 10.

[0105] Further, it is defined that: f1 is the focal length of the first lens 10; f2 is the focal length of the second lens 20; f3 is the focal length of the third lens 30; f4 is the focal length of the fourth lens 40; f5 is the focal length of the fifth lens 50; n1 is the nd refractive index of the first lens 10; n2 is the nd refractive index of the second lens 20; n3 is the nd refractive index of the third lens 30; n4 is the nd refractive index of the fourth lens 40; n5 is the nd refractive index of the fifth lens 50; υ1 is the Vd Abbe number of the first lens 10; υ2 is the Vd Abbe number of the second lens 20; υ3 is the Vd Abbe number of the third lens 30; υ4 is the Vd Abbe number of the fourth lens 40; υ5 is the Vd Abbe number of the fifth lens 50.

[0106] 3 is the Vd Abbe number of the third lens 30; υ4 is the Vd Abbe number of the fourth lens 40; υ5 is the Vd Abbe number of the fifth lens 50.

[0107] First embodiment

[0108] Please refer to Figure 7 for an example of the first embodiment of the optical lens 1 of the present application. The longitudinal spherical aberration on the imaging plane 4 of the first embodiment please refer to Figure 8 Part A, the sagittal direction of the field curvature aberration please refer to Figure 8The sagittal (tangential) field curvature aberration is described in Part B of FIG. 1 Figure 8 The distortion aberration is described in Part C of FIG. 1 Figure 8 The distortion aberration is described in Part D of FIG. 1. The Y-axis of each of the spherical aberration graphs represents the field of view, and the highest point of each of the field of view is 1.0. The Y-axis of each of the aberration graphs and the distortion graph represents the image height, and the image height (ImgH) of the first embodiment is 0.691 mm.

[0109] The optical lens 1 of the first embodiment mainly includes five lenses with refractive powers, an aperture 2, and an imaging surface 4. The aperture 2 of the first embodiment is disposed on one side of the third lens 30 toward the object side Al.

[0110] The first lens 10 has a negative refractive power. The optical axis region 13 of the object side surface 11 of the first lens 10 is a convex surface, and the circumferential region 14 thereof is a convex surface. The optical axis region 16 of the image side surface 12 of the first lens 10 is a concave surface, and the circumferential region 17 thereof is a concave surface. The object side surface 11 and the image side surface 12 of the first lens 10 are both spherical surfaces, but are not limited thereto.

[0111] The second lens 20 has a negative refractive power. The optical axis region 23 of the object side surface 21 of the second lens 20 is a convex surface, and the circumferential region 24 thereof is a convex surface. The optical axis region 26 of the image side surface 22 of the second lens 20 is a concave surface, and the circumferential region 27 thereof is a concave surface. The object side surface 21 and the image side surface 22 of the second lens 20 are both aspherical surfaces, but are not limited thereto.

[0112] The third lens 30 has a positive refractive power. The optical axis region 33 of the object side surface 31 of the third lens 30 is a concave surface, and the circumferential region 34 thereof is a concave surface. The optical axis region 36 of the image side surface 32 of the third lens 30 is a convex surface, and the circumferential region 37 thereof is a convex surface. The object side surface 31 and the image side surface 32 of the third lens 30 are both aspherical surfaces, but are not limited thereto.

[0113] The fourth lens 40 has a positive refractive power. The optical axis region 43 of the object side surface 41 of the fourth lens 40 is a convex surface, and the circumferential region 44 thereof is a convex surface. The optical axis region 46 of the image side surface 42 of the fourth lens 40 is a convex surface, and the circumferential region 47 thereof is a convex surface. The object side surface 41 and the image side surface 42 of the fourth lens 40 are both aspherical surfaces, but are not limited thereto.

[0114] The fifth lens 50 has a negative refractive power. The optical axis region 53 of the object side surface 51 of the fifth lens 50 is a concave surface, and the circumferential region 54 thereof is a concave surface. The optical axis region 56 of the image side surface 52 of the fifth lens 50 is a concave surface, and the circumferential region 57 thereof is a concave surface. The object side surface 51 and the image side surface 52 of the fifth lens 50 are both aspherical surfaces, but are not limited thereto.

[0115] In the optical lens 1 of the present application, all of the ten surfaces from the first lens 10 to the fifth lens 50 are aspherical surfaces, but not limited thereto. If aspherical, the aspherical surfaces are defined by the following equation:

[0116]

[0117] wherein:

[0118] Y represents the perpendicular distance from the point on the aspherical surface to the optical axis I;

[0119] Z represents the depth of the aspherical surface (the perpendicular distance between the point on the aspherical surface with Y distance to the optical axis I and the tangent plane at the vertex of the aspherical surface on the optical axis I);

[0120] R represents the radius of curvature of the lens surface near the optical axis I;

[0121] K is the conic constant;

[0122] a i is the aspherical coefficient of the i-th order, wherein the a2 coefficient of each embodiment is 0.

[0123] The material parameters of the lenses disclosed in the optical data table of the embodiments are in the format of nd refractive index and Vd Abbe number of international glass code, so that the skilled person in the art can know the specific material implementation. Among them, nd is the refractive index of the substance at the d helium yellow line 587.56 nanometers, and Vd is calculated by the refractive index of the substance at the Fraunhofer spectrum d, F and C wavelengths. The focal length values disclosed in the optical data table of the embodiments are calculated by the refractive index of the wavelength band implemented by the optical system, and the primary wavelength implemented by the embodiments of the present application is 540 nanometers, so the focal length values of the present application are calculated by the refractive index of the material at 540 nanometers.

[0124] The optical data of the first embodiment of the optical lens system is shown in Table 1, and the aspherical surface data is shown in Table 2. Figure 21 Figure 22 ​The optical lens system in the following embodiment has an overall optical lens with an Fno, an EFL, and a HFOV that is half of the maximum FOV in the overall optical lens, where the units of the image height, the radius of curvature, the thickness, and the focal length of the optical lens are all in millimeters (mm). In this embodiment, the EFL = 0.752 mm; the EFL2t5 = 0.695 mm; the HFOV = 53.275 degrees; the TTL = 2.941 mm; the Fno = 1.950; the image height = 0.691 mm. The longitudinal spherical aberration = ±0.045 mm; the sagittal field curvature aberration = ±0.045 mm; the tangential field curvature aberration = ±0.045 mm; and the distortion aberration = ±40%.

[0125] Second Embodiment

[0126] Please refer to Figure 9 for a second embodiment of the optical lens 1 of the present application. Please note that from the second embodiment, for the purpose of simplification and clarity of the drawings, only the optical axis regions and the peripheral regions of the surfaces of the lenses that are different from those in the first embodiment are specially marked in the drawings, while the optical axis regions and the peripheral regions of the surfaces of the lenses that are the same as those in the first embodiment, such as concave or convex surfaces, are not specially marked. The longitudinal spherical aberration on the image plane 4 of the second embodiment can be referred to as part A in Figure 10 , the sagittal field curvature aberration can be referred to as part B in Figure 10 , the tangential field curvature aberration can be referred to as part C in Figure 10 , and the distortion aberration can be referred to as part D in Figure 10 . The design of the second embodiment is similar to that of the first embodiment, except that only the lens power, the lens radius of curvature, the lens thickness, the lens aspheric coefficients, or the back focal length, etc. are different. In addition, in this embodiment, the optical axis region 43 of the object side surface 41 of the fourth lens 40 is concave, the fifth lens 50 has a positive power, the optical axis region 56 of the image side surface 52 of the fifth lens 50 is convex, and the peripheral region 57 of the image side surface 52 of the fifth lens 50 is convex.

[0127] The detailed optical data of the second embodiment are shown in Figure 23 , and the aspheric data are shown in Figure 24EFL = 0.705 mm; EFL2t5 = 0.685 mm; HFOV = 50.142 degrees; TTL = 2.617 mm; Fno = 1.950; image height = 0.691 mm. Longitudinal spherical aberration = ±0.04 mm; sagittal aberration = ±0.1 mm; tangential aberration = ±0.16 mm; distortion aberration = ±30%. In particular: 1. the system length of the present embodiment is less than that of the first embodiment; 2. the distortion aberration of the present embodiment is better than that of the first embodiment.

[0128] Third embodiment

[0129] Please refer to Figure 11 for a third embodiment of the optical lens 1 of the present application. The longitudinal spherical aberration of the third embodiment on the image plane 4 is shown in Figure 12 Part A, the sagittal field curvature aberration is shown in Figure 12 Part B, the tangential field curvature aberration is shown in Figure 12 Part C, and the distortion aberration is shown in Figure 12 Part D. The third embodiment is similar to the first embodiment, except that only the lens refractive power, the lens curvature radius, the lens thickness, the lens aspheric coefficient or the back focal length are different. In addition, in the present embodiment, the first lens 10 has a positive refractive power, the optical axis region 23 of the object side 21 of the second lens 20 is concave, and the circumferential region 24 of the object side 21 of the second lens 20 is concave.

[0130] The detailed optical data of the third embodiment is shown in Figure 25 , and the aspheric data is shown in Figure 26 . In the present embodiment, EFL = 0.705 mm; EFL2t5 = 0.685 mm; HFOV = 50.142 degrees; TTL = 2.617 mm; Fno = 1.950; image height = 0.691 mm. Longitudinal spherical aberration = ±0.04 mm; sagittal aberration = ±0.1 mm; tangential aberration = ±0.16 mm; distortion aberration = ±30%. In particular: 1. the system length of the present embodiment is less than that of the first embodiment; 2. the distortion aberration of the present embodiment is better than that of the first embodiment.

[0131] Fourth embodiment

[0132] Please refer to Figure 13 for a fourth embodiment of the optical lens 1 of the present application. The longitudinal spherical aberration of the fourth embodiment on the image plane 4 is shown in Figure 14 Part A, the sagittal field curvature aberration is shown in Figure 14 Part B, the tangential field curvature aberration is shown in Figure 14 Part C, and the distortion aberration is shown in Figure 14Part D. The design of the fourth embodiment is similar to that of the first embodiment, except that the only differences are in related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length. In addition, in this embodiment, the first lens 10 has a positive refractive index.

[0133] Detailed optical data for the fourth embodiment are as follows: Figure 27 As shown, the aspherical data is as follows Figure 28 As shown. In this embodiment, EFL = 0.825 mm; EFL2t5 = 0.767 mm; HFOV = 52.224 degrees; TTL = 3.090 mm; Fno = 1.950; image height = 0.691 mm. Longitudinal spherical aberration = ±0.04 mm; sagittal aberration = ±0.04 mm; meridional aberration = ±0.06 mm; distortion aberration = ±40%. In particular: 1. The sagittal field curvature aberration of this embodiment is better than that of the first embodiment; 2. The longitudinal spherical aberration of this embodiment is better than that of the first embodiment.

[0134] Fifth embodiment

[0135] Please see Figure 15 This illustrates a fifth embodiment of the optical lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the fifth embodiment, please refer to... Figure 16 For part A and the field curvature aberration in the sagittal direction, please refer to [reference needed]. Figure 16 For Part B and the field curvature aberrations in the meridional direction, please refer to [reference needed]. Figure 16 For part C and distortion aberrations, please refer to [reference needed]. Figure 16 Part D. The design of the fifth embodiment is similar to that of the first embodiment, except that the only differences are in related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length. In addition, in this embodiment, the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex.

[0136] Detailed optical data for the fifth embodiment are as follows: Figure 29 As shown, the aspherical data is as follows Figure 30 As shown, in this embodiment, EFL = 0.715 mm; EFL2t5 = 0.667 mm; HFOV = 58.950 degrees; TTL = 2.861 mm; Fno = 1.950; image height = 0.702 mm. Longitudinal spherical aberration = ±0.035 mm; sagittal aberration = ±0.05 mm; meridional aberration = ±0.05 mm; distortion aberration = ±50%. Specifically: 1. The system length of this embodiment is less than that of the first embodiment; 2. The half-angle of view of this embodiment is greater than that of the first embodiment; 3. The longitudinal spherical aberration of this embodiment is superior to that of the first embodiment.

[0137] Sixth Embodiment

[0138] Referring to Figure 17 , a sixth embodiment of the optical lens 1 according to the present application is illustrated. The longitudinal spherical aberration on the imaging plane 4 of the sixth embodiment is referred to as part A of Figure 18 , the sagittal field curvature aberration is referred to as part B of Figure 18 , the tangential field curvature aberration is referred to as part C of Figure 18 , and the distortion aberration is referred to as part D of Figure 18 . The design of the sixth embodiment is similar to that of the first embodiment, except that the lens power, the lens curvature radius, the lens thickness, the lens asphericity coefficient, or the back focal length, etc. are different. In addition, in the present embodiment, the first lens 10 has a positive power, the optical axis region 43 of the object side surface 41 of the fourth lens 40 is concave, and the optical axis region 56 of the object side surface 51 of the fifth lens 50 is convex.

[0139] The detailed optical data of the sixth embodiment is shown in Figure 31 , and the asphericity data is shown in Figure 32 . In the present embodiment, EFL = 0.530 mm; EFL2t5 = 0.505 mm; HFOV = 56.727°; TTL = 2.347 mm; Fno = 1.950; image height = 0.691 mm. The longitudinal spherical aberration = ±0.008 mm; the sagittal aberration = ±0.02 mm; the tangential aberration = ±0.03 mm; the distortion aberration = ±16%. In particular: 1. the system length of the present embodiment is smaller than that of the first embodiment; 2. the half view angle of the present embodiment is larger than that of the first embodiment; 3. the longitudinal spherical aberration of the present embodiment is better than that of the first embodiment; 4. the sagittal field curvature aberration of the present embodiment is better than that of the first embodiment; 5. the tangential field curvature aberration of the present embodiment is better than that of the first embodiment; 6. the distortion aberration of the present embodiment is better than that of the first embodiment.

[0140] Seventh embodiment

[0141] Referring to Figure 19 , a seventh embodiment of the optical lens 1 according to the present application is illustrated. The longitudinal spherical aberration on the imaging plane 4 of the seventh embodiment is referred to as part A of Figure 20 , the sagittal field curvature aberration is referred to as part B of Figure 20 , the tangential field curvature aberration is referred to as part C of Figure 20 , and the distortion aberration is referred to as part D of Figure 20 . The design of the seventh embodiment is similar to that of the first embodiment, except that the lens power, the lens curvature radius, the lens thickness, the lens asphericity coefficient, or the back focal length, etc. are different.

[0142] The detailed optical data of the seventh embodiment is shown in Figure 33as shown in FIG. 1, the aspheric data is as shown in FIG. 2, and the lens data is as shown in FIG. 3. Figure 34 As shown in FIG. 1, the aspheric data is as shown in FIG. 2, and the lens data is as shown in FIG. 3.

[0143] In addition, the important parameters of each embodiment are arranged in Figure 35 , Figure 36 and Figure 37 .

[0144] Each embodiment of the present application provides a five-piece optical lens which can satisfy the product appearance, lightness and thinness, large field of view, good optical quality, good optical performance, and technical feasibility. For example, the design satisfying the following lens surface shape and lens refractive power can effectively optimize the optical quality of the optical lens, and the corresponding effects can be achieved:

[0145] 1. When the invention meets the third lens 30 having a positive refractive power, the circumferential area 27 of the image side surface 22 of the second lens 20 is concave, the circumferential area 34 of the object side surface 31 of the third lens 30 is concave, and the circumferential area 44 of the object side surface 41 of the fourth lens 40 is convex, the light rays of different angles can be converged and collected, and the aberration of the central field of view can be corrected. In order to improve the quality of the product appearance, the appropriate first lens 10 can be designed by satisfying Dmax12 / Sag12≧15.500, and further satisfying |f1| / Gmax≧88.000, which can maintain the optical quality through the combination of the focal length of the first lens 10 and the maximum air gap, wherein Dmax12 / Sag12≧15.500, the preferred limit is in the range of 33.000≧Dmax12 / Sag12≧15.500. |f1| / Gmax≧88.000, the preferred limit is in the range of 2500.000≧|f1| / Gmax≧88.000, and the sub-optimal range is 211.000≧|f1| / Gmax≧88.000.

[0146] 2. As 1, when further satisfying that the second lens 20 has a negative refractive power and the fourth lens 40 has a positive refractive power, the distortion of the edge field of view can be further corrected, and the optical quality can be improved.

[0147] 3. When the invention is consistent with the third lens 30 having a positive refractive power, the circumferential area 27 of the image side surface 22 of the second lens 20 is concave, the circumferential area 34 of the object side surface 31 of the third lens 30 is concave, and the circumferential area 44 of the object side surface 41 of the fourth lens 40 is convex, different angles of light rays can be converged and collected, and the aberration of the central field of view can be corrected. In order to improve the quality of the appearance of the product, a proper first lens 10 can be designed by satisfying Dmax12 / Dmax21≧2.000, and further satisfying |f1| / Gmax≧88.000, so as to maintain the optical quality through the combination of the focal length of the first lens 10 and the maximum air gap, wherein Dmax12 / Dmax21≧1.780, and the preferred limit is in the range of 2.900≧Dmax12 / Dmax21≧2.000. |f1| / Gmax≧88.000, and the preferred limit is in the range of 2500.000≧|f1| / Gmax≧88.000, and the sub-optimal range is 211.000≧|f1| / Gmax≧88.000.

[0148] 4. According to claim 3, when further satisfying that the second lens 20 has a negative refractive power and the fourth lens 40 has a positive refractive power, the distortion of the edge field of view can be further corrected, and the optical quality is improved.

[0149] 5. When the invention is consistent with the third lens 30 having a positive refractive power, the on-axis area 26 of the image side surface 22 of the second lens 20 is concave, the circumferential area 34 of the object side surface 31 of the third lens 30 is concave, and the circumferential area 44 of the object side surface 41 of the fourth lens 40 is convex, different angles of light rays can be converged and collected, and the aberration of the central field of view can be corrected. In order to improve the quality of the appearance of the product, a proper first lens 10 can be designed by satisfying Dmax12 / Dmax21≧2.000, and further satisfying |f1| / Gmax≧88.000, so as to maintain the optical quality through the combination of the focal length of the first lens 10 and the maximum air gap, wherein Dmax12 / Dmax21≧1.780, and the preferred limit is in the range of 2.900≧Dmax12 / Dmax21≧2.000. |f1| / Gmax≧88.000, and the preferred limit is in the range of 2500.000≧|f1| / Gmax≧88.000, and the sub-optimal range is 211.000≧|f1| / Gmax≧88.000.

[0150] 6. According to claim 5, when further satisfying that the second lens 20 has a negative refractive power and the fourth lens 40 has a positive refractive power, the distortion of the edge field of view can be further corrected, and the optical quality is improved.

[0151] 7. When the lens material is consistent with the following configuration relationship, the transmission and deflection of light are beneficial, and the chromatic aberration is effectively improved, so that the optical lens has excellent optical quality.

[0152] u1 / u5 > 2.500, preferably 4.100 > u1 / u5 > 2.500.

[0153] (u2+u3+u4) / u5 > 5.300, preferably 7.700 > (u2+u3+u4) / u5 > 6.300.

[0154] u1 / u2 > 2.000, preferably 3.500 > u1 / u2 > 2.000.

[0155] 8. In order to achieve the shortening of the lens system length and the optical quality, while taking into account the difficulty of manufacture, the air gap between the lenses is reduced or the lens thickness is moderately shortened as a means, if the numerical limit of the following conditional expression is satisfied, the embodiment of the present application has, preferably, the limit of arrangement.

[0156] |f1| / Tmax > 9.000, preferably 155.000 > |f1| / Tmax > 69.000;

[0157] (EFL+T1) / EFL2t5 > 1.000, preferably 2.300 > (EFL+T1) / EFL2t5 > 1.000;

[0158] HFOV / D21t31 > 70.000, preferably 295.000 > HFOV / D21t31 > 70.000;

[0159] TL / ImgH > 2.500, preferably 4.100 > TL / ImgH > 2.500;

[0160] D11t21 / D31t41 > 1.700, preferably 4.200 > D11t21 / D31t41 > 1.700;

[0161] TTL / D42t52 > 9.700, preferably 15.200 > TTL / D42t52 > 9.700;

[0162] Fno / AAG*(T3+T4) > 1.700, preferably 3.000 > Fno / AAG*(T3+T4) > 1.700;

[0163] ALT / EFL > 1.900, preferably 2.900 > ALT / EFL > 1.900;

[0164] Fno*D11t21 / BFL > 1.750, preferably 5.000 > Fno*D11t21 / BFL > 1.750;

[0165] D21t52 / D11t21≦3.100, preferably 0.900≦D21t52 / D11t21≦3.100;

[0166] D21t52 / |EFL2t5|≧1.500, preferably 3.100≧D21t52 / |EFL2t5|≧1.500;

[0167] HFOV / ALT≧15.000, preferably 51.500≧HFOV / ALT≧25.500;

[0168] (ImgH+BFL) / D11t21≦2.800, preferably 0.900≦(ImgH+BFL) / D11t21≦2.800;

[0169] TTL / (T2+T3+T4)≧3.500, preferably 2.400≧TTL / (T2+T3+T4)≧3.500;

[0170] (D11t21+G34) / EFL2t5≦2.000, preferably 0.800≦(D11t21+G34) / EFL2t5≦2.000;

[0171] D12t31 / AAG≧1.350, preferably 2.600≧D12t31 / AAG≧1.350;

[0172] TL / D41t52≧2.750, preferably 4.200≧TL / D41t52≧2.750;

[0173] |f1| / EFL2t5≧79.000, preferably 120.000≧|f1| / EFL2t5≧79.000.

[0174] In addition, any combination of the embodiment parameters can be selected to increase the lens limitations, thereby facilitating the design of lenses of the same architecture.

[0175] Due to the unpredictability of optical system design, the above conditions can preferably shorten the system length, reduce the aperture value, improve the optical quality, and increase the assembly yield, thereby overcoming the disadvantages of the prior art. The plastic material used in the embodiments of the present application can further reduce the weight and cost of the lens.

[0176] The combination of the optical parameters disclosed in the embodiments of the present application can be implemented within the numerical range including the maximum and minimum values.

[0177] The disclosed embodiments of the present application include, but are not limited to, optical parameters such as focal length, lens thickness, Vd Abbe number, etc. For example, the present application discloses an optical parameter A and an optical parameter B. The range covered by the optical parameters, the comparison relationship between the optical parameters, and the specific explanation of the conditional range covered by the embodiments are as follows:

[0178] (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, where α1 is the maximum value of the optical parameter A in the embodiments, α2 is the minimum value of the optical parameter A in the embodiments, β1 is the maximum value of the optical parameter B in the embodiments, and β2 is the minimum value of the optical parameter B in the embodiments.

[0179] (2) The comparison relationship between the optical parameters, for example: A is greater than B or A is less than B.

[0180] (3) The conditional range covered by the embodiments, specifically, the combination relationship or proportional relationship obtained by possible operations of multiple optical parameters in the same embodiment, which is defined as E. E can be, for example: A+B or A-B or A / B or A*B or (A*B) 1 / 2 and E satisfies the condition E≦γ1 or E≧γ2 or γ2≦E≦γ1, where γ1 and γ2 are the values obtained by the operation of the optical parameter A and the optical parameter B in the same embodiment, and γ1 is the maximum value in the embodiments of the present application, and γ2 is the minimum value in the embodiments of the present application.

[0181] The range covered by the optical parameters, the comparison relationship between the optical parameters, and the maximum value, the minimum value, and the numerical range within the maximum value and the minimum value of the condition are all features that can be implemented by the present application, and all belong to the disclosed range of the present application. The above is only an example and should not be limited.

[0182] The embodiments of the present application can be implemented, and part of the feature combinations can be extracted in the same embodiment, which can also achieve unexpected effects compared with the prior art. The feature combinations include, but are not limited to, the combination of surface shape, refractive index, and conditional formula. The disclosure of the embodiments of the present application is a specific embodiment to illustrate the principle of the present application, which should not limit the present application to the disclosed embodiments. Further, the embodiments and the drawings are only used to demonstrate the present application and are not limited thereto.

[0183] The above is only a preferred embodiment of the present application, and any equivalent changes and modifications made within the scope of the patent application of the present application shall belong to the scope of the present application.

Claims

1. An optical lens, characterized in that: Along an optical axis from an object side to an image side, there are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence, and each of the first lens to the fifth lens includes an object side facing the object side and allowing light to pass through, and an image side facing the image side and allowing light to pass through. The second lens has a negative refractive index, and a circumferential region on the image side of the second lens is concave. The third lens has a positive refractive index, and a circumferential region on the side of the third lens is concave; and The fourth lens has a positive refractive index, and a circumferential region on the image side of the fourth lens is convex. The optical lens has only the five lenses mentioned above. Dmax12 is the distance between two points forming the maximum straight-line distance on the outermost edge contour of the image-side full surface of the first lens. Sag12 is a Sag value of the optical boundary of the image-side surface of the first lens. f1 is a focal length of the first lens. Gmax is the maximum value of the four air gaps on the optical axis from the first lens to the fifth lens, and satisfies Dmax12 / Sag12≧15.500, |f1| / Gmax≧88.

000.

2. An optical lens, characterized in that: Along an optical axis from an object side to an image side, there are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence, and each of the first lens to the fifth lens includes an object side facing the object side and allowing light to pass through, and an image side facing the image side and allowing light to pass through. The second lens has a negative refractive index, and a circumferential region on the image side of the second lens is concave. The third lens has a positive refractive index, and a circumferential region on the side of the third lens is concave; and The fourth lens has a positive refractive index, and a circumferential region on the image side of the fourth lens is convex. The optical lens has only the five lenses mentioned above. Dmax12 is the distance between two points forming the maximum straight-line distance on the outermost edge contour of the image-side full surface of the first lens. Dmax21 is the distance between two points forming the maximum straight-line distance on the outermost edge contour of the object-side full surface of the second lens. f1 is the focal length of the first lens. Gmax is the maximum value of the four air gaps on the optical axis from the first lens to the fifth lens, and satisfies Dmax12 / Dmax21≧2.000, |f1| / Gmax≧88.

000.

3. An optical lens, characterized in that: Along an optical axis from an object side to an image side, there are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence, and each of the first lens to the fifth lens includes an object side facing the object side and allowing light to pass through, and an image side facing the image side and allowing light to pass through. The optical axis region on the image side of the second lens is concave; The third lens has a positive refractive index, and a circumferential region on the side of the third lens is concave; and A circumferential region on the image side of the fourth lens is convex. The optical lens has only the five lenses mentioned above. Dmax12 is the distance between two points forming the maximum straight-line distance on the outermost edge contour of the image-side full surface of the first lens. Dmax21 is the distance between two points forming the maximum straight-line distance on the outermost edge contour of the object-side full surface of the second lens. f1 is a focal length of the first lens. Gmax is defined as the maximum value of the four air gaps on the optical axis from the first lens to the fifth lens, and satisfies Dmax12 / Dmax21≧2.000, |f1| / Gmax≧88.

000.

4. The optical lens as described in claim 1, 2, or 3, characterized in that: Where Tmax is the maximum value of the thickness of the five lenses from the first lens to the fifth lens on the optical axis, and the optical lens satisfies the following condition: |f1| / Tmax≧9.

000.

5. The optical lens as described in claim 1, 2, or 3, characterized in that: Where EFL is an effective focal length of the optical lens, T1 is a thickness of the first lens on the optical axis, EFL2t5 is an effective focal length of the second to fifth lenses of the optical lens, and the optical lens satisfies the following condition: (EFL+T1) / EFL2t5≧1.

000.

6. The optical lens as described in claim 1, 2, or 3, characterized in that: Where HFOV is half the field of view of the optical lens, D21t31 is the distance on the optical axis from the object side of the second lens to the object side of the third lens, and the optical lens satisfies the following condition: HFOV / D21t31≧70.

000.

7. The optical lens as described in claim 1, 2, or 3, characterized in that: Where TL is a distance on the optical axis from the object side of the first lens to the image side of the fifth lens, ImgH is an image height of the optical lens, and the optical lens satisfies the following condition: TL / ImgH≧2.

500.

8. The optical lens as described in claim 1, 2, or 3, characterized in that: Where D11t21 is the distance on the optical axis from the object side of the first lens to the object side of the second lens, and D31t41 is the distance on the optical axis from the object side of the third lens to the object side of the fourth lens, and the optical lens satisfies the following condition: D11t21 / D31t41≧1.

700.

9. The optical lens as described in claim 1, 2, or 3, characterized in that: Where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, D42t52 is the distance from the image side of the fourth lens to the image side of the fifth lens on the optical axis, and the optical lens satisfies the following condition: TTL / D42t52≧9.

700.

10. The optical lens as described in claim 1, 2, or 3, characterized in that: Where Fno is an aperture value of the optical lens, AAG is the sum of the four air gaps of the first to the fifth lenses on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and the optical lens satisfies the following condition: Fno / AAG*(T3+T4)≧1.

700.

11. The optical lens as described in claim 1, 2, or 3, characterized in that: Where ALT is the sum of the thicknesses of the five lenses from the first lens to the fifth lens on the optical axis, EFL is an effective focal length of the optical lens, and the optical lens satisfies the following condition: ALT / EFL ≥ 1.

900.

12. The optical lens as described in claim 1, 2, or 3, characterized in that: Where Fno is an aperture value of the optical lens, D11t21 is a distance on the optical axis from the object side of the first lens to the object side of the second lens, BFL is a distance on the optical axis from the image side of the fifth lens to an imaging plane, and the optical lens satisfies the following condition: Fno*D11t21 / BFL≧1.

750.

13. The optical lens as described in claim 1, 2, or 3, characterized in that: Where D21t52 is a distance on the optical axis from the object side of the second lens to the image side of the fifth lens, and D11t21 is a distance on the optical axis from the object side of the first lens to the object side of the second lens, and the optical lens satisfies the following condition: D21t52 / D11t21≦3.

100.

14. The optical lens as described in claim 1, 2, or 3, characterized in that: Where D21t52 is a distance on the optical axis from the object side of the second lens to the image side of the fifth lens, EFL2t5 is an effective focal length from the second lens to the fifth lens of the optical lens, and the optical lens satisfies the following condition: D21t52 / |EFL2t5|≧1.

500.

15. The optical lens as described in claim 1, 2, or 3, characterized in that: Where HFOV is half the field of view of the optical lens, ALT is the sum of the thicknesses of the five lenses from the first lens to the fifth lens on the optical axis, and the optical lens satisfies the following condition: HFOV / ALT≧15.

000.

16. The optical lens as described in claim 1, 2, or 3, characterized in that: Where ImgH is an image height of the optical lens, BFL is a distance on the optical axis from the image side of the fifth lens to an imaging surface, and D11t21 is a distance on the optical axis from the object side of the first lens to the object side of the second lens, and the optical lens satisfies the following condition: (ImgH+BFL) / D11t21≦2.

800.

17. The optical lens as described in claim 1, 2, or 3, characterized in that: Where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and the optical lens satisfies the following condition: TTL / (T2+T3+T4)≧3.

500.

18. The optical lens as described in claim 1, 2, or 3, characterized in that: Where D11t21 is the distance on the optical axis from the object side of the first lens to the object side of the second lens, G34 is the air gap on the optical axis between the third lens and the fourth lens, EFL2t5 is the effective focal length between the second lens and the fifth lens of the optical lens, and the optical lens satisfies the following condition: (D11t21+G34) / EFL2t5≦2.

000.

19. The optical lens as described in claim 1, 2, or 3, characterized in that: Where D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens, AAG is the sum of the four air gaps on the optical axis from the first lens to the fifth lens, and the optical lens satisfies the following condition: D12t31 / AAG≧1.

350.

20. The optical lens as described in claim 1, 2, or 3, characterized in that: Where TL is the distance on the optical axis from the object side of the first lens to the image side of the fifth lens, and D41t52 is the distance on the optical axis from the object side of the fourth lens to the image side of the fifth lens, and the optical lens satisfies the following condition: TL / D41t52≧2.750.

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