Optical lens

Abstract

The invention discloses an optical lens which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side. An optical axis region forming the object side surface of the first lens is a concave surface, the second lens has a positive refractive index, a circumferential region forming the image side surface of the second lens is a convex surface, an optical axis region forming the image side surface of the fourth lens is a concave surface, an optical axis region forming the image side surface of the fifth lens is a convex surface, and at least two conditional expressions are met. Therefore, the optical lens provided by the invention has the advantages of reduced overall volume, large field angle and excellent optical quality.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical lens, and particularly to an optical lens applied to five lenses. BACKGROUND

[0002] In recent years, optical lenses have evolved and are applied to a wider range of fields, not only for image and video shooting, but also for environmental monitoring, driving record photography, virtual reality (VR) tracking, and facial recognition. In addition to the requirement for thin and small lenses, a large field of view has gradually become a trend. Therefore, how to design an optical lens that is thin and small, has a large field of view, and has good optical quality has become a problem to be challenged and solved. SUMMARY

[0003] To this end, the present application forms a concave light axis region on the object side of the first lens, makes the second lens have a positive refractive power, forms a convex circumferential region on the image side of the second lens, forms a concave light axis region on the image side of the fourth lens, forms a convex light axis region on the image side of the fifth lens, and satisfies at least two conditional expressions, so that the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side is close to each other, and has a smaller size in any XY plane, thereby providing an optical lens with a reduced overall volume, a large field of view, and excellent optical quality.

[0004] According to the present application, an optical lens is provided, which includes five lenses along an optical axis from an object side to an image side, including 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 surface facing the object side and passing imaging light, and an image side surface facing the image side and passing imaging light.

[0005] For the convenience of representing the parameters of the present application, the following definitions are used in the present specification and drawings: T1 represents the thickness of the first lens along the optical axis, G12 represents the distance between the image side surface of the first lens and the object side surface of the second lens along the optical axis, i.e. the air gap between the first lens and the second lens along the optical axis, T2 represents the thickness of the second lens along the optical axis, G23 represents the distance between the image side surface of the second lens and the object side surface of the third lens along the optical axis, i.e. the air gap between the second lens and the third lens along the optical axis, T3 represents the thickness of the third lens along the optical axis, G34 represents the distance between the image side surface of the third lens and the object side surface of the fourth lens along the optical axis, i.e. the air gap between the third lens and the fourth lens along the optical axis, T4 represents the thickness of the fourth lens along the optical axis, G45 represents the distance between the image side surface of the fourth lens and the object side surface of the fifth lens along the optical axis, i.e. the air gap between the fourth lens and the fifth lens along the optical axis, T5 represents the thickness of the fifth lens along the optical axis, G5F represents the air gap between the fifth lens and the filter along the optical axis, TF represents the thickness of the filter along the optical axis, GFP represents the air gap between the filter and the imaging plane along the optical axis, f1 represents the focal length of the first lens, f2 represents the focal length of the second lens, f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, f5 represents the focal length of the fifth lens, n1 represents the nd refractive index of the first lens, n2 represents the nd refractive index of the second lens, n3 represents the nd refractive index of the third lens, n4 represents the nd refractive index of the fourth lens, n5 represents the nd refractive index of the fifth lens, V1 represents the Vd Abbe number of the first lens, V2 represents the Vd Abbe number of the second lens, V3 represents the Vd Abbe number of the third lens, V4 represents the Vd Abbe number of the fourth lens, V5 represents the Vd Abbe number of the fifth lens, EFL represents the system focal length of the optical lens, TL represents the distance between the object side surface of the first lens and the image side surface of the fifth lens along the optical axis, TTL represents the system length of the optical lens, i.e. the distance between the object side surface of the first lens and the imaging plane along the optical axis, ALT represents the sum of the thicknesses of the five lenses along the optical axis (i.e. the sum of T1, T2, T3, T4 and T5), AAG represents the sum of the distances between the image side surface of the first lens and the object side surface of the second lens along the optical axis, the distance between the image side surface of the second lens and the object side surface of the third lens along the optical axis, the distance between the image side surface of the third lens and the object side surface of the fourth lens along the optical axis, and the distance between the image side surface of the fourth lens and the object side surface of the fifth lens along the optical axis, i.e. the sum of the four air gaps between the first lens and the fifth lens along the optical axis (i.e. the sum of G12, G23, G34 and G45), BFL represents the back focal length of the optical lens, i.e. the distance between the image side surface of the fifth lens and the imaging plane along the optical axis (i.e. the sum of G5F, TF and GFP), D21t41 represents the distance between the object side surface of the second lens and the object side surface of the fourth lens along the optical axis, i.e. the sum of T2, G23, T3 and G34, D31t52 represents the distance between the object side surface of the third lens and the image side surface of the fifth lens along the optical axis,That is, the sum of T3, G34, T4, G45, and T5; Tmax represents the maximum thickness of the five lenses along the optical axis from the first to the fifth lens, i.e., the maximum values ​​of T1, T2, T3, T4, and T5; HFOV represents the half-angle of the optical lens; ImgH represents the image height of the optical lens; Fno represents the aperture value of the optical lens; D11 represents the distance between the two points forming the maximum straight-line distance of the outermost edge contour of the object-side surface of the first lens, which is the optical boundary of the object-side surface of the first lens; D51 represents the distance between the two points forming the maximum straight-line distance of the outermost edge contour of the object-side surface of the fifth lens, which is also the optical boundary of the object-side surface of the fifth lens.

[0006] Secondly, the lens material parameters disclosed in the optical datasheet of the embodiments are in the international glass code format of nd refractive index and Vd Abbe number, so that those skilled in the art can know the specific material implementation. Here, nd is the refractive index of the material at the d-helium yellow line of 587.56 nm, and Vd is calculated using the refractive index of the material at the d, F, and C wavelengths of the Fraunhofer spectrum. The focal length values ​​disclosed in the optical datasheets 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.

[0007] According to one aspect of the present invention, an optical lens is provided in which a first lens has a concave optical axis region on the object side, a second lens has a positive refractive index, and a circumferential region on the image side of the second lens is a convex surface, a fourth lens has a concave optical axis region on the image side, and a fifth lens has a convex optical axis region on the image side. The optical lens is composed of the above five lenses and satisfies the condition (1): 22.700 degrees ≤ HFOV*(T5+T3) / (ImgH*Fno) and the condition (2): 0.650 ≤ (D11*0.5) / ImgH ≤ 1.100.

[0008] According to another aspect of the present invention, an optical lens is provided in which a region of the optical axis on the object side of the first lens is concave, the second lens has a positive refractive index, and a region of the optical axis on the image side of the second lens is convex, a region of the optical axis on the image side of the fourth lens is concave, and a region of the optical axis on the image side of the fifth lens is convex. The optical lens is composed of the above five lenses and satisfies condition (1) and condition (2).

[0009] According to another aspect of the present application, an optical lens is provided, wherein a region of an optical axis on an object side of a first lens is concave, a refractive power of a second lens is positive, a region of an optical axis on an image side of the second lens is convex, a circumferential region on an object side of a third lens is convex, a circumferential region on an object side of a fourth lens is concave, and a region of an optical axis on an image side of the fourth lens is concave, the optical lens comprises the above five lenses, and satisfies conditional expression (1) and conditional expression (2).

[0010] The present application can selectively control the aforementioned parameters to satisfy at least one of the following conditional expressions:

[0011] V1+V2+V4≧120.000 conditional expression (3);

[0012] (T2+T3+T4+T5) / (AAG*Fno)≧0.500 conditional expression (4);

[0013] D21t41 / BFL≧1.000 conditional expression (5);

[0014] TTL / (T1+T2)≦4.000 conditional expression (6);

[0015] TL / (G34+G45)≧15.000 conditional expression (7);

[0016] D31t52 / (T1+G23)≧2.500 conditional expression (8);

[0017] Tmax / EFL≧0.500 conditional expression (9);

[0018] ALT / (T1+T4)≧3.000 conditional expression (10);

[0019] T2 / T1≧1.500 conditional expression (11);

[0020] (T3+T5) / EFL≧0.500 conditional expression (12);

[0021] ALT / EFL≧3.000 conditional expression (13);

[0022] (T2+T3+T5) / BFL≧1.000 conditional expression (14);

[0023] ALT / ImgH≧2.000 conditional expression (15);

[0024] ImgH / (T1+G23)≦3.500 conditional expression (16);

[0025] TTL / (ImgH*Fno)≧0.800 conditional expression (17);

[0026] HFOV*EFL / (BFL+G23)≦70.000 degrees conditional equation (18); and / or

[0027] HFOV*ImgH / BFL≦75.000 degrees conditional equation (19).

[0028] The aforementioned exemplary conditional equations can be optionally combined in any number of ways in the embodiments of the present application, and are not limited thereto. In addition to the aforementioned conditional equations, other more detailed lens surface configurations, refractive power variations, material selections, or other detailed structures can be designed for a single lens or a plurality of lenses in order to enhance the control of system performance and / or resolution. It should be noted that these details can be optionally combined in other embodiments of the present application without conflict.

[0029] As can be seen from the above, the optical lens of the present application can maintain excellent optical performance with respect to optical quality, while having a large field of view and a reduced overall size. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A lens profile structure diagram of an embodiment of the present application is shown;

[0031] Figure 2 A diagram showing the relationship between lens surface shape and light focus is shown;

[0032] Figure 3 A diagram showing the relationship between lens surface shape and region boundaries in Example 1 is shown;

[0033] Figure 4 A diagram showing the relationship between lens surface shape and region boundaries in Example 2 is shown;

[0034] Figure 5 A diagram showing the relationship between lens surface shape and region boundaries in Example 3 is shown;

[0035] Figure 6 A diagram showing the profile structure of a five-lens optical lens according to the first embodiment of the present application is shown;

[0036] Figures 7A to 7D A diagram showing the longitudinal spherical aberration and various aberrations of the optical lens according to the first embodiment of the present application is shown;

[0037] Figure 8 A diagram showing the detailed optical data of each lens of the optical lens according to the first embodiment of the present application is shown;

[0038] Figure 9A A diagram showing the aspherical surface data of the optical lens according to the first embodiment of the present application is shown;

[0039] Figure 10 shows the cross-sectional structure of a five-piece lens of an optical lens according to the second embodiment of the present application;

[0040] Figures 11A to 11D shows the longitudinal spherical aberration and aberration diagrams of an optical lens according to the second embodiment of the present application;

[0041] Figure 12 shows the detailed optical data of each lens of an optical lens according to the second embodiment of the present application;

[0042] Figure 13A shows the aspherical surface data of an optical lens according to the second embodiment of the present application;

[0043] Figure 14 shows the cross-sectional structure of a five-piece lens of an optical lens according to the third embodiment of the present application;

[0044] Figures 15A to 15D shows the longitudinal spherical aberration and aberration diagrams of an optical lens according to the third embodiment of the present application;

[0045] Figure 16 shows the detailed optical data of each lens of an optical lens according to the third embodiment of the present application;

[0046] Figure 17A shows the aspherical surface data of an optical lens according to the third embodiment of the present application;

[0047] Figure 18 shows the cross-sectional structure of a five-piece lens of an optical lens according to the fourth embodiment of the present application;

[0048] Figures 19A to 19D shows the longitudinal spherical aberration and aberration diagrams of an optical lens according to the fourth embodiment of the present application;

[0049] Figure 20 shows the detailed optical data of each lens of an optical lens according to the fourth embodiment of the present application;

[0050] Figure 21A shows the aspherical surface data of an optical lens according to the fourth embodiment of the present application;

[0051] Figure 22 shows the cross-sectional structure of a five-piece lens of an optical lens according to the fifth embodiment of the present application;

[0052] Figures 23A to 23D shows the longitudinal spherical aberration and aberration diagrams of an optical lens according to the fifth embodiment of the present application;

[0053] Figure 24 Detailed optical data of each lens of the optical lens according to the fifth embodiment of the present application is shown in Table 25A and Table 25B.

[0054] Figure 25A Aspherical surface data of the optical lens according to the fifth embodiment of the present application is shown in Table 25A and Table 25B.

[0055] Figure 26 A cross-sectional structure schematic diagram of a five-piece lens of the optical lens according to the sixth embodiment of the present application is shown in Table 26A and Table 26B.

[0056] Figures 27A to 27D A longitudinal spherical aberration and aberration diagram of the optical lens according to the sixth embodiment of the present application is shown in Table 26A and Table 26B.

[0057] Figure 28 Detailed optical data of each lens of the optical lens according to the sixth embodiment of the present application is shown in Table 26A and Table 26B.

[0058] Figure 29A Aspherical surface data of the optical lens according to the sixth embodiment of the present application is shown in Table 26A and Table 26B.

[0059] Figure 30 A cross-sectional structure schematic diagram of a five-piece lens of the optical lens according to the seventh embodiment of the present application is shown in Table 27A and Table 27B.

[0060] Figures 31A to 31D A longitudinal spherical aberration and aberration diagram of the optical lens according to the seventh embodiment of the present application is shown in Table 27A and Table 27B.

[0061] Figure 32 Detailed optical data of each lens of the optical lens according to the seventh embodiment of the present application is shown in Table 27A and Table 27B.

[0062] Figure 33A Aspherical surface data of the optical lens according to the seventh embodiment of the present application is shown in Table 27A and Table 27B.

[0063] Figure 34A 、 34BA comparison table of D11, D51, HFOV*(T5+T3) / (ImgH*Fno), (D11*0.5) / ImgH, (D51*0.5) / ImgH, V1+V3-2V4, V1+V2+V4, (T2+T3+T4+T5) / (AAG*Fno), D21t41 / BFL, TTL / (T1+T2), TL / (G34+G45), D31t52 / (T1+G23), Tmax / EFL, ALT / (T1+T4), T2 / T1, (T3+T5) / EFL, ALT / EFL, (T2+T3+T5) / BFL, ALT / ImgH, ImgH / (T1+G23), TTL / (ImgH*Fno), HFOV*EFL / (BFL+G23), and HFOV*ImgH / BFL values of the above seven embodiments.

[0064] BRIEF DESCRIPTION OF DRAWINGS

[0065] 1, 2, 3, 4, 5, 6, 7: optical lens

[0066] 100, 200, 300, 400, 500: lens; 130: assembly part

[0067] 211, 212: parallel light; STO: stop

[0068] CG: protective glass; L1: first lens; L2: second lens; L3: third lens; L4: fourth lens; L5: fifth lens

[0069] TF: filter; IMA: imaging surface

[0070] 110, 410, 510, CGA1, L1A1, L2A1, L3A1, L4A1, L5A1, TFA1: object side surface

[0071] 120, 320, CGA2, L1A2, L2A2, L3A2, L4A2, L5A2, TFA2: image side surface

[0072] Z1, L1A1C, L1A2C, L2A1C, L2A2C, L3A1C, L3A2C, L4A1C, L4A2C, L5A1C, L5A2C: optical axis region

[0073] Z2, L1A1P, L1A2P, L2A1P, L2A2P, L3A1P, L3A2P, L4A1P, L4A2P, L5A1P, L5A2P: circumferential region

[0074] A1: Object side; A2: Image side; CP: Center point; CP1: First center point; CP2: Second center point; TP1: First conversion point; TP2: Second conversion point; OB: Optical boundary;

[0075] I: Optical axis; Lc: Principal ray; Lm: Peripheral ray; EL: Extension line; Z3: Relay region; M, R: Intersection point. Detailed Implementation

[0076] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The elements in the drawings are not drawn to scale, and similar element symbols are generally used to represent similar elements.

[0077] 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.

[0078] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system from parallel to the optical axis to within a half-angle (HFOV) relative to the optical axis. The imaging rays pass through the optical system and form an image on the imaging plane. 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 "the 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) (e.g., ...). Figure 1 (As shown). The object side (or image side) of the lens can be divided into different regions depending on the 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.

[0079] Figure 1 This 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 the intersection of this surface and the optical axis I. For example... Figure 1The first center point CP1 is located on the object side 110 of the lens 100, and the second center point CP2 is located on the image side 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, if there are multiple turning points on a single lens surface, 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).

[0080] The range from the center point to the first turning point TP1 is defined as the optical axis region, where the optical axis region includes the center point. The region radially outward from the Nth turning point farthest from the optical axis I 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.

[0081] 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.

[0082] 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 of an optical system (not shown). 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 lenses discussed below can be partially or entirely omitted in the drawings.

[0083] Referring to Figure 2 , the optical axis region Z1 is defined between the center point CP and the first turning point TP1. The circumferential region Z2 is defined between the first turning point TP1 and the optical boundary OB of the lens surface. As shown in Figure 2 , the parallel light ray 211 intersects the optical axis I on the image side A2 of the lens 200 after passing through the optical axis region Z1, i.e., the focal point of the parallel light ray 211 passing through the optical axis region Z1 is located at the R point on the image side A2 of the lens 200. Since the light 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 light ray 212 diverges after passing through the circumferential region Z2. As shown in Figure 2As shown, the extended 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 extended 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. As shown in Fig. 2, the circumferential region Z2 is a concave region. Figure 2 In the lens 200 as shown, 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 transition to the concave.

[0084] On the other hand, the concave-convex judgment of the surface shape of the optical axis region can also be made 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 judge the concave-convex 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 of judgment are consistent with the results of the aforementioned judgment method by the intersection of the light ray / extended line of the light ray and the optical axis, i.e. the judgment method of the concave-convex of the surface shape by the focal point of a parallel light ray with respect to the optical axis located at the object side or the image side of the lens. 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.

[0085] Figures 3 to 5 Examples of judging the surface shape of the regions and the boundary of the regions of the lens in various cases are provided, including the aforementioned optical axis region, circumferential region, and relay region.

[0086] Figure 3 Fig. 3 is a radial cross-sectional view of a lens 300. Referring to Fig. 3, the image side surface 320 of the 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 the lens 300 are as shown in Fig. 3. Figure 3 Figure 3 As shown in Fig. 3, the R value of the image side surface 320 is positive (i.e. R > 0), and therefore the optical axis region Z1 is concave.

[0087] In general, the surface shape of each region bounded by the transition point is opposite to that of the adjacent region, and therefore the transition of the surface shape can be defined by the transition point, i.e. the transition from concave to convex or from convex to concave at the transition point. Figure 3 In Fig. 3, since the optical axis region Z1 is concave, the surface shape is transitioned at the transition point TP1, and therefore the circumferential region Z2 is convex.​

[0088] Figure 4 This is a radial sectional view of lens 400. See also... 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.

[0089] 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. Furthermore, 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. See again. 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 located 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 to concave from the first conversion point TP1, the relay region Z3 is concave. Furthermore, its surface shape changes to convex again from the second conversion point TP2, so the circumferential region Z2 is convex.

[0090] Figure 5 This 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. See also Figure 5 The lens 500 shown defines the optical axis region Z1 of the object-side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 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 the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0091] The optical lens of the present application is a certain focus lens, which is provided with five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence. The first lens to the fifth lens each includes an object side surface facing the object side and passing the imaging light, and an image side surface facing the image side and passing the imaging light. The optical lens of the present application can reduce the size of the optical lens in any XY plane and enlarge the field of view while maintaining good optical performance by designing the surface shape characteristics and parameter value range of the lens, and preferably can additionally reduce the aperture value and / or increase the image height.

[0092] The characteristics of the aforementioned lens designed herein mainly consider the optical performance, system length, aperture value, image height and / or field of view of the optical lens, which will be explained one by one in the following paragraphs.

[0093] When the object side surface of the first lens is concave in the optical axis region, the second lens has positive refractive power, the circumferential region of the image side surface of the second lens is convex, the optical axis region of the image side surface of the fourth lens is concave, and the optical axis region of the image side surface of the fifth lens is convex, the light rays of different angles can be converged and collected, and the aberration of the central field of view of the optical surface can be corrected. In addition, by satisfying condition formula (1) and condition formula (2), and by matching the aperture and the length between the lenses, and by the preferable proportion of the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side and the image height, the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side is close, so that the size of the lens in any XY plane is small, the volume of the overall optical lens can be reduced, and a larger half view angle can be maintained while maintaining the optical quality. Preferably, 22.700 degrees≤HFOV*(T5+T3) / (ImgH*Fno)≤95.000 degrees can be further satisfied.

[0094] When the object side surface of the first lens is concave in the optical axis region, the second lens has positive refractive power, the circumferential region of the image side surface of the second lens is convex, the optical axis region of the image side surface of the fourth lens is concave, and the optical axis region of the image side surface of the fifth lens is convex, the light rays of different angles can be converged and collected, and the aberration of the central field of view of the optical surface can be corrected. In addition, by satisfying condition formula (1) and condition formula (2), and by matching the aperture and the length between the lenses, and by the preferable proportion of the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side and the image height, the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side is close, so that the size of the lens in any XY plane is small, the volume of the overall optical lens can be reduced, and a larger half view angle can be maintained while maintaining the optical quality. Preferably, 22.700 degrees≤HFOV*(T5+T3) / (ImgH*Fno)≤95.000 degrees can be further satisfied.

[0095] When the invention meets the condition that the optical axis region of the object side surface of the first lens is concave, the second lens has positive refractive power, the optical axis region of the image side surface of the second lens is convex, the circumferential region of the object side surface of the third lens is convex, the circumferential region of the object side surface of the fourth lens is concave, and the optical axis region of the image side surface of the fourth lens is concave, the light rays of different angles can be converged and collected, and the aberration of the central field of view of the optical surface can be corrected. In addition, the condition formula (1) and the condition formula (2) are met, the length between the aperture and the lens is matched, and the distance between the two points formed by the maximum straight line distance of the outermost contour of each lens from the object side to the image side is close, so that the size of the lens in any XY plane is small, the volume of the whole optical lens can be reduced, and a large half viewing angle can be maintained while maintaining the optical quality. Preferably, 22.700 degrees≤HFOV*(T5+T3) / (ImgH*Fno)≤95.000 degrees can be further met.

[0096] When the lens material meets the condition formula (3), the transmission and deflection of light rays are facilitated, and the chromatic aberration is effectively improved, so that the optical lens has excellent optical quality. Preferably, 150.000≧V1+V2+V4≧120.000 can be further met.

[0097] In order to shorten the length of the lens system and ensure the optical quality, while considering the difficulty of manufacturing, the air gap between the lenses is reduced or the thickness of the lens is moderately shortened as a means. If the numerical limits of condition formulas (5)-(16) are met, the embodiments of the present application can have a better configuration. Preferably, 3.100≧D21t41 / BFL≧1.000, 2.000≦TTL / (T1+T2)≦4.000, 100.000≧TL / (G34+G45)≧15.000, 7.500≧D31t52 / (T1+G23)≧2.500, 1.500≧Tmax / EFL≧0.500, 6.500≧ALT / (T1+T4)≧3.000, 6.000≧T2 / T1≧1.500, 2.500≧(T3+T5) / EFL≧0.500, 4.500≧ALT / EFL≧3.000, 4.000≧(T2+T3+T5) / BFL≧1.000, 4.500≧ALT / ImgH≧2.000, and / or 1.000≦ImgH / (T1+G23)≦3.500 can be further met.

[0098] To achieve a large view angle, a better focal length, and ensure optical quality, while considering the difficulty of manufacturing, adjusting the air gap between the lenses or the lens thickness, if the numerical limits of conditional expression (4), conditional expression (17)-(19) are met, the embodiments of the present application can have a better configuration. Preferably, 5.500≧(T2+T3+T4+T5) / (AAG*Fno)≧0.500, 4.000≧TTL / (ImgH*Fno)≧0.800, 20.000 degrees≦HFOV*EFL / (BFL+G23)≦70.000 degrees, and / or 35.000 degrees≦HFOV*ImgH / BFL≦75.000 degrees can be further met.

[0099] In addition, any combination of the embodiment parameters can be selected to increase the lens limit, which is beneficial to the lens design of the same architecture of the present application.

[0100] Due to the unpredictability of optical system design, under the architecture of the present application, the conditional expressions described above can preferably shorten the system length, have a small aperture value, have excellent optical quality, or improve the assembly yield to improve the shortcomings of the prior art. The lenses of the embodiments of the present application use plastic materials to further reduce the weight of the lens and save costs.

[0101] The combination of the optical parameter ratio relationship disclosed in each embodiment of the present application can be implemented within the numerical range including the maximum and minimum values.

[0102] In the implementation of the present application, in addition to the above conditional expressions, other more lens concave-convex surface arrangements, refractive rate changes, or other detailed structures can be additionally designed for a single lens or a plurality of lenses in the following embodiments to strengthen the control of system performance and / or resolution and improve the manufacturing yield. In addition, in terms of material design, all lenses of the optical lens of the embodiments of the present application can be made of various transparent materials such as sapphire, glass, plastic, and resin. It should be noted that these details need to be selectively applied to other embodiments of the present application without conflict, and are not limited thereto.

[0103] To illustrate that the present application can indeed provide good optical performance while increasing the field of view and reducing the overall volume, a plurality of embodiments and their detailed optical data are provided below. First, please refer to Figure 6 to FIG. 9, wherein Figure 6 a cross-sectional structure schematic diagram of a five-piece lens of an optical lens according to the first embodiment of the present application is shown, Figure 7A , 7B , 7C, 7D show the longitudinal spherical aberration and aberration diagram of the optical lens according to the first embodiment of the present application, Figure 8This displays detailed optical data of the optical lens according to the first embodiment of the present invention. Figure 9A , 9B This displays the aspherical data of each lens of the optical lens according to the first embodiment of the present invention.

[0104] like Figure 6 As shown, the optical lens 1 of this embodiment includes, from the object side A1 to the image side A2, a protective glass CG, a first lens L1, an aperture stop STO, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. Next, a filter TF and an imaging surface IMA of an image sensor are both disposed on the image side A2 of the optical lens 1. In this embodiment, the filter TF is an infrared cut filter and is disposed between the fifth lens L5 and the imaging surface IMA. The filter TF filters out wavelengths of specific bands from the light passing through the optical lens 1, such as filtering out the infrared band, so that the wavelengths of the infrared band are not imaged on the imaging surface IMA.

[0105] The first lens L1 of the optical lens 1 is exemplarily made of sapphire material, and the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 are exemplarily made of plastic materials such as APL5016SL, EP-10000_21 and APL5014CL_20. However, they are not limited to these materials and may also be made of other transparent materials, such as glass and resin.

[0106] The detailed structure of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 is as follows: The first lens L1 has a negative refractive index and has an object-side surface L1A1 facing the object side A1 and an image-side surface L1A2 facing the image side A2. The optical axis region L1A1C of the object-side surface L1A1 is concave, and its circumferential region L1A1P is also concave. The optical axis region L1A2C of the image-side surface L1A2 is also concave, and its circumferential region L1A2P is also concave. Both the object-side surface L1A1 and the image-side surface L1A2 of the first lens L1 are aspherical.

[0107] The second lens L2 has a positive refractive index and has an object-side surface L2A1 facing the object side A1 and an image-side surface L2A2 facing the image side A2. The optical axis region L2A1C of the object-side surface L2A1 is convex, and its circumferential region L2A1P is also convex. The optical axis region L2A2C of the image-side surface L2A2 is convex, and its circumferential region L2A2P is also convex. Both the object-side surface L2A1 and the image-side surface L2A2 of the second lens L2 are aspherical.

[0108] The third lens L3 has positive refractive power, and has a lens surface L3A1 facing the object side Al and a lens surface L3A2 facing the image side A2. The optical axis region L3A1C of the lens surface L3A1 is a convex surface, and the circumferential region L3A1P thereof is a convex surface. The optical axis region L3A2C of the lens surface L3A2 is a convex surface, and the circumferential region L3A2P thereof is a convex surface. Both the lens surface L3A1 and the lens surface L3A2 of the third lens L3 are aspherical surfaces.

[0109] The fourth lens L4 has negative refractive power, and has a lens surface L4A1 facing the object side Al and a lens surface L4A2 facing the image side A2. The optical axis region L4A1C of the lens surface L4A1 is a convex surface, and the circumferential region L4A1P thereof is a concave surface. The optical axis region L4A2C of the lens surface L4A2 is a concave surface, and the circumferential region L4A2P thereof is a convex surface. Both the lens surface L4A1 and the lens surface L4A2 of the fourth lens L4 are aspherical surfaces.

[0110] The fifth lens L5 has positive refractive power, and has a lens surface L5A1 facing the object side Al and a lens surface L5A2 facing the image side A2. The optical axis region L5A1C of the lens surface L5A1 is a convex surface, and the circumferential region L5A1P thereof is a convex surface. The optical axis region L5A2C of the lens surface L5A2 is a convex surface, and the circumferential region L5A2P thereof is a concave surface. Both the lens surface L5A1 and the lens surface L5A2 of the fifth lens L5 are aspherical surfaces.

[0111] In the present embodiment, air gaps are provided between the lenses L1, L2, L3, L4, L5, the filter TF, and the imaging surface IMA of the image sensor, but the present embodiment is not limited thereto. In other embodiments, the profiles of any two opposing lens surfaces can be designed to correspond to each other, and can be attached to each other to eliminate the air gap therebetween.

[0112] The numerical values of the optical characteristics and the distances of the lenses in the optical lens 1 of the present embodiment are shown in Table 1 below. Figure 8 The numerical values of the parameters are shown in Table 2 below. Figure 34AIn the present embodiment and each of the following embodiments, the parameters listed include D11, D51, HFOV*(T5+T3) / (ImgH*Fno), (D11*0.5) / ImgH, (D51*0.5) / ImgH, V1+V3-2V4, V1+V2+V4, (T2+T3+T4+T5) / (AAG*Fno), D21t41 / BFL, TTL / (T1+T2), TL / (G34+G45), D31t52 / (T1+G23), Tmax / EFL, ALT / (T1+T4), T2 / T1, (T3+T5) / EFL, ALT / EFL, (T2+T3+T5) / BFL, ALT / ImgH, ImgH / (T1+G23), TTL / (ImgH*Fno), HFOV*EFL / (BFL+G23), and HFOV*ImgH / BFL. It can be known from Figure 34A that the optical lens 1 satisfies the conditional expressions (1), (2), and conditional expressions (3)-(19).

[0113] The object side L1A1 and image side L1A2 of the first lens L1, the object side L2A1 and image side L2A2 of the second lens L2, the object side L3A1 and image side L3A2 of the third lens L3, the object side L4A1 and image side L4A2 of the fourth lens L4, and the object side L5A1 and image side L5A2 of the fifth lens L5, a total of ten aspherical surfaces are defined according to the following aspherical surface curve formula:

[0114]

[0115] Y represents the vertical distance of a point on the aspherical surface from the optical axis; Z represents the depth of the aspherical surface (the vertical distance between the point on the aspherical surface at a distance Y from the optical axis and the tangent plane at the vertex of the aspherical surface on the optical axis); R represents the radius of curvature of the lens surface near the optical axis; K is the conic constant; a i is the aspherical coefficient of the i-th order. The detailed data of the parameters of each aspherical surface are shown in Table 1. Figure 9A 9B In the present embodiment and each of the following embodiments, the aspherical coefficient a2 of the second order of each aspherical surface is 0.

[0116] Figure 7A A schematic diagram of the longitudinal spherical aberration of the present embodiment is shown, with the horizontal axis representing the longitudinal spherical aberration and the vertical axis representing the field of view. Figure 7B A schematic diagram of the lateral field curvature aberration of the present embodiment is shown, Figure 7C A schematic diagram of the meridional field curvature aberration of the present embodiment is shown, with the horizontal axis representing the field curvature aberration and the vertical axis representing the image height. Figure 7D ​A schematic diagram illustrating the distortion aberration of this embodiment is shown, with the horizontal axis representing percentage and the vertical axis representing image height. Off-axis rays at different heights for three representative wavelengths (420nm, 555nm, 650nm) are all concentrated near the imaging point. The skewness of each curve shows that the imaging point deviation for off-axis rays at different heights is controlled within -0.001 to 0.008mm, significantly improving spherical aberration at different wavelengths. The field curvature aberration in the sagittal direction falls within -0.004 to 0.008mm, and the field curvature aberration in the meridional direction falls within -0.016 to 0.012mm, while the distortion aberration remains within -50% to 0%.

[0117] The data above shows that the various optical characteristics of optical lens 1 meet the quality requirements of the optical system. In this embodiment, optical lens 1 expands the half-field of view (HFOV) to 58.585 degrees, reduces the system length to 2.525 mm, and effectively provides better optical quality compared to existing optical lenses.

[0118] refer to Figures 10 to 13B , Figure 10 This diagram shows a cross-sectional view of a five-element lens according to a second embodiment of the present invention. Figure 11A , 11B Displays 11C and 11D as schematic diagrams of longitudinal spherical aberration and various aberrations of an optical lens according to a second embodiment of the present invention. Figure 12 Detailed optical data of the optical lens according to the second embodiment of the present invention are shown. Figure 13A , 13B This displays the aspherical data of each lens in the optical lens according to the second embodiment of the present invention. For example... Figure 10 As shown, the optical lens 2 of this embodiment includes, from the object side A1 to the image side A2, a protective glass CG, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0119] The surface configurations of the object side surfaces L3A1, L4A1 on the object side A1 and the image side surfaces L2A2, L3A2, L4A2, L5A2 on the image side A2 of the second embodiment and the refractive power configurations of the lenses other than the first lens L1 are substantially similar to those of the first embodiment, except that the optical parameters related to the curvature radii, the lens thicknesses, the aspheric coefficients, the back focal lengths, and the surface configurations of the object side surfaces L1A1, L2A1, L5A1 and the image side surface L1A2 of the second embodiment and the first lens L1 of the present embodiment have positive refractive power, which are different from those of the first embodiment. In order to more clearly show the figures, only the places where the surface configurations of the optical axis regions and the circumferential regions of the present embodiment are different from those of the first embodiment are marked, and the markings of the optical axis regions and the circumferential regions of the same surface configurations are omitted. The same applies to the following embodiments. In detail, the differences in the surface configurations are that the circumferential region L1A1P of the object side surface L1A1 of the first lens L1 of the present embodiment is convex, the optical axis region L1A2C of the image side surface L1A2 of the first lens L1 is convex, the optical axis region L2A1C and the circumferential region L2A1P of the object side surface L2A1 of the second lens L2 are both concave, and the optical axis region L5A1C of the object side surface L5A1 of the fifth lens L5 is concave. For the values of the optical properties of the lenses and the distances of the optical lens 2 of the present embodiment, please refer to Figure 12 . For the values of the parameters, please refer to Figure 34A .

[0120] From the longitudinal spherical aberration of Figure 11A , it can be seen from the deflection amplitudes of each curve that the imaging point deviations of the off-axis rays of different heights are controlled within -0.01-0.006 mm. From the sagittal field curvature aberration of Figure 11B , the variation amounts of the three representative wavelengths fall within -0.06-0 mm. From the meridional field curvature aberration of Figure 11C , the variation amounts of the three representative wavelengths fall within -0.14-0.02 mm. Figure 11D The distortion aberration of the optical lens 2 is shown to be maintained within the range of 0-6%. Compared with the first embodiment, the longitudinal spherical aberration and the distortion aberration of the present embodiment are smaller.

[0121] From the above data, it can be seen that the various optical properties of the optical lens 2 have met the quality requirements of the optical system. The optical lens 2 of the present embodiment expands the half viewing angle (HFOV) to 44.213 degrees and shortens the system length to 2.586 mm, while effectively providing better optical quality compared with existing optical lenses.

[0122] Reference is made to Figures 14 to 17B , wherein Figure 14This diagram shows a cross-sectional view of a five-element lens according to a third embodiment of the present invention. Figure 15A , 15B Displays 15C and 15D schematic diagrams of various aberrations of the optical lens according to the third embodiment of the present invention. Figure 16 Detailed optical data of the optical lens according to the third embodiment of the present invention are shown. Figure 17A , 17B This displays the aspherical data of each lens in the optical lens according to the third embodiment of the present invention. For example... Figure 14 As shown, the optical lens 3 of this embodiment includes, from the object side A1 to the image side A2, a protective glass CG, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0123] The concave-convex configuration of the lens surfaces L3A1, L4A1, L5A1 facing the object side A1 and L2A2 facing the image side A2 in the third embodiment, as well as the positive and negative refractive index configurations of each lens except the third lens L3, are generally similar to those in the first embodiment. However, the relevant optical parameters such as the radius of curvature, lens thickness, aspherical coefficient, and back focal length, the concave-convex configuration of the lens surfaces L1A1, L2A1 and L1A2, L3A2, L4A2, L5A2 facing the image side A2, and the negative refractive index of the third lens L3 in the third embodiment are different from those in the first embodiment. In detail, the differences in the surface concavity / convexity configuration are as follows: In this embodiment, the circumferential region L1A1P of the object-side surface L1A1 of the first lens L1 is convex; the optical axis region L1A2C of the image-side surface L1A2 of the first lens L1 is convex; both the optical axis region L2A1C and the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 are concave; the optical axis region L3A2C of the image-side surface L3A2 of the third lens L3 is concave; the circumferential region L4A2P of the image-side surface L4A2 of the fourth lens L4 is concave; and the circumferential region L5A2P of the image-side surface L5A2 of the fifth lens L5 is convex. For the optical characteristics and distance values ​​of each lens in the optical lens 3 of this embodiment, please refer to... Figure 16 For the values ​​of each parameter, please refer to [link / reference]. Figure 34A .

[0124] from Figure 15A In the longitudinal spherical aberration, the skewness of each curve shows that the imaging point deviation of off-axis rays at different heights is controlled within -0.015 to 0.025 mm. From... Figure 15B In the field curvature aberration along the sagittal direction, the variations of the three representative wavelengths fall within the range of 0–0.025 mm. From Figure 15CIn the field curvature aberration along the meridional direction, the variations of the three representative wavelengths fall within -0.04 to 0.05 mm. Figure 15D The distortion aberration of the optical lens 3 is maintained within the range of 0% to 6%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and meridional directions are smaller in this embodiment.

[0125] The data above shows that the various optical characteristics of optical lens 3 meet the quality requirements of the optical system. In this embodiment, optical lens 3 expands the half field of view (HFOV) to 39.954 degrees and shortens the system length to 3.655 mm, while effectively providing better optical quality compared to existing optical lenses.

[0126] Please refer to the following as well. Figures 18 to 21B ,in Figure 18 This diagram shows a cross-sectional view of the five-element lens of the optical lens according to the fourth embodiment of the present invention. Figure 19A , 19B Displays schematic diagrams of longitudinal spherical aberration and various aberrations of an optical lens according to the fourth embodiment of the present invention, 19C and 19D. Figure 20 This displays detailed optical data of the optical lens according to the fourth embodiment of the present invention. Figure 21A , 21B This displays the aspherical data of each lens in the optical lens according to the fourth embodiment of the present invention. For example... Figure 18 As shown, the optical lens 4 of this embodiment includes, from the object side A1 to the image side A2, a protective glass CG, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0127] The configurations of the concave-convex of the object side surfaces L3A1, L4A1 of the fourth embodiment toward the object side A1 and the image side surfaces L1A2, L2A2, L3A2, L5A2 of the fourth embodiment toward the image side A2 and the configurations of the positive or negative refractive power of each lens except the fourth lens L4 and the fifth lens L5 are substantially similar to those of the first embodiment, except that the optical parameters related to the radius of curvature, the lens thickness, the asphericity coefficient, the back focal length, and the like of each lens and the configurations of the concave-convex of the lens surfaces, such as the object side surfaces L1A1, L2A1, L5A1 and the image side surfaces L4A2, of the fourth embodiment, the fourth lens L4 having a positive refractive power, and the fifth lens L5 having a negative refractive power are different from those of the first embodiment. In detail, the difference in the configuration of the surface concave-convex is that the peripheral region L1A1P of the object side surface L1A1 of the first lens L1 of the present embodiment is a convex surface, the optical axis region L2A1C and the peripheral region L2A1P of the object side surface L2A1 of the second lens L2 are both concave surfaces, the peripheral region L4A2P of the image side surface L4A2 of the fourth lens L4 is a concave surface, and the optical axis region L5A1C of the object side surface L5A1 of the fifth lens L5 is a concave surface. For the values of the optical characteristics of each lens and the distances of the optical lens 4 of the present embodiment, please refer to Figure 20 . For the values of the parameters, please refer to Figure 34A .

[0128] From the longitudinal spherical aberration of Figure 19A , the deviation of the imaging points of the off-axis rays of different heights can be seen from the deflection amplitude of each curve, which is controlled within -0.07-0.02 mm. From the sagittal direction field curvature aberration of Figure 19B , the variation of the three representative wavelengths falls within -0.07-0.02 mm. From the meridional direction field curvature aberration of Figure 19C , the variation of the three representative wavelengths falls within -0.07-0.08 mm. Figure 19D The distortion aberration of the optical lens 4 is maintained within the range of -40-5%. Compared with the first embodiment, the distortion aberration of the present embodiment is smaller.

[0129] From the above data, it can be seen that the various optical characteristics of the optical lens 4 have met the quality requirements of the optical system. The optical lens 4 of the present embodiment expands the half viewing angle (HFOV) to 56.651 degrees and shortens the system length to 3.396 mm, while effectively providing better optical quality compared with existing optical lenses.

[0130] For reference, please also refer to Figures 22 to 25B , wherein Figure 22 shows a cross-sectional structure schematic diagram of a five-piece lens of the optical lens according to the fifth embodiment of the present application, Figure 23A , 23B , 23C, 23D show the longitudinal spherical aberration and the various aberration diagrams of the optical lens according to the fifth embodiment of the present application, Figure 24Detailed optical data of the optical lens according to the fifth embodiment of the present invention are shown. Figure 25A , 25B This displays the aspherical data of each lens in the optical lens according to the fifth embodiment of the present invention. For example... Figure 22 As shown, the optical lens 5 of this embodiment includes, from the object side A1 to the image side A2, a protective glass CG, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0131] The concave-convex configuration of the lens surfaces of the object-side surfaces L1A1, L3A1, L4A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L2A2 facing the image side A2 in the fifth embodiment, as well as the positive and negative refractive index configuration of each lens except the third lens L3, are generally similar to those in the first embodiment. However, the radius of curvature, lens thickness, aspherical coefficient, back focal length, the concave-convex configuration of the object-side surface L2A1 and the image-side surfaces L3A2, L4A2, L5A2, and the negative refractive index of the third lens L3 in the fifth embodiment are different from those in the first embodiment. In detail, the differences in the surface concavity / convexity configuration are as follows: the optical axis region L2A1C and the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 are both concave; the optical axis region L3A2C and the circumferential region L3A2P of the image-side surface L3A2 of the third lens L3 are both concave; the circumferential region L4A2P of the image-side surface L4A2 of the fourth lens L4 is concave; and the circumferential region L5A2P of the image-side surface L5A2 of the fifth lens L5 is convex. For the optical characteristics and distance values ​​of each lens in the optical lens 5 of this embodiment, please refer to... Figure 24 For the values ​​of each parameter, please refer to [link / reference]. Figure 34B .

[0132] from Figure 23A In the longitudinal spherical aberration, the skewness of each curve shows that the imaging point deviation of off-axis rays at different heights is controlled within -0.05 to 0.02 mm. From... Figure 23B In the field curvature aberration along the sagittal direction, the variations of the three representative wavelengths fall within the range of -0.06 to 0.02 mm. From Figure 23C In the field curvature aberration along the meridional direction, the variations of the three representative wavelengths fall within the range of -0.14 to 0.02 mm. Figure 23D The distortion aberration of the optical lens 5 is maintained within the range of 0% to 6%. Compared with the first embodiment, the distortion aberration in this embodiment is smaller.

[0133] From the above data, it can be seen that the optical characteristics of the optical lens 5 have met the quality requirements of the optical system. The optical lens 5 of the present embodiment has enlarged the half field of view (HFOV) to 40.617 degrees and shortened the system length to 3.757 mm, while effectively providing better optical quality compared to the prior optical lens.

[0134] Reference is also made to Figures 26 to 29B , wherein Figure 26 shows the cross-sectional structure of a five-piece lens of the optical lens according to the sixth embodiment of the present application, Figure 27A , 27B , 27C, 27D show the longitudinal spherical aberration and aberration diagrams of the optical lens according to the sixth embodiment of the present application, Figure 28 shows the detailed optical data of the optical lens according to the sixth embodiment of the present application, Figure 29A , 29B shows the aspheric data of each lens of the optical lens according to the sixth embodiment of the present application. As shown in Figure 26 , the optical lens 6 of the present embodiment sequentially comprises, from the object side Al to the image side A2, a protective glass CG, a first lens Ll, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0135] The convex-concave configuration of the lens surfaces of the object side surfaces L3A1, L4A1, L5A1 toward the object side Al and the image side surfaces L1A2, L2A2, L3A2 toward the image side A2 and the positive and negative refractive power configuration of each lens of the sixth embodiment are generally similar to those of the first embodiment, except that the curvature radius, the lens thickness, the back focal length, and the surface convex-concave configuration of the object side surfaces L1A1, L2A1 and the image side surfaces L4A2, L5A2 of the sixth embodiment are different from those of the first embodiment. In detail, the difference in the surface convex-concave configuration is that the circumferential region L1A1P of the object side surface L1A1 of the first lens Ll of the present embodiment is convex, the optical axis region L2A1C and the circumferential region L2A1P of the object side surface L2A1 of the second lens L2 are both concave, the circumferential region L4A2P of the image side surface L4A2 of the fourth lens L4 is concave, and the circumferential region L5A2P of the image side surface L5A2 of the fifth lens L5 is convex. For the values of the optical characteristics and the distances of each lens of the optical lens 6 of the present embodiment, please refer to Figure 28 . For the values of the parameters, please refer to Figure 34B .

[0136] From the longitudinal spherical aberration of Figure 27A , it can be seen from the deflection amplitude of each curve that the imaging point deviation of the off-axis light rays of different heights is controlled within 0-0.008 mm. From Figure 27BIn the field curvature aberration along the sagittal direction, the variations of the three representative wavelengths fall within the range of -0.02 to 0.02 mm. From Figure 27C In the field curvature aberration along the meridional direction, the variations of the three representative wavelengths fall within -0.07 to 0.05 mm. Figure 27D The distortion aberration of the optical lens 6 is maintained within the range of -35% to 5%. Compared with the first embodiment, the longitudinal spherical aberration, sagittal and meridional field curvature aberration, and distortion aberration in this embodiment are smaller.

[0137] The data above shows that the various optical characteristics of the optical lens 6 meet the quality requirements of the optical system. The optical lens 6 in this embodiment expands the half-field of view (HFOV) to 60.041 degrees and shortens the system length to 3.561 mm. At the same time, it effectively provides better optical quality compared to existing optical lenses, and the half-field of view in this embodiment is better than that in the first embodiment.

[0138] Please refer to the following as well. Figures 30 to 33B ,in Figure 30 This diagram shows a cross-sectional view of a five-element lens according to a seventh embodiment of the present invention. Figure 31A , 31B Displays 31C and 31D as schematic diagrams of longitudinal spherical aberration and various aberrations of an optical lens according to the seventh embodiment of the present invention. Figure 32 Detailed optical data of the optical lens according to the seventh embodiment of the present invention are shown. Figure 33A , 33B This displays the aspherical data of each lens in the optical lens according to the seventh embodiment of the present invention. For example... Figure 30 As shown, the optical lens 7 of this embodiment includes, from the object side A1 to the image side A2, a first lens L1, an aperture STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter TF, and an imaging surface IMA of an image sensor.

[0139] The concave-convex configuration of the lens surfaces L1A1, L3A1, L4A1, L5A1 facing the object side A1 and L1A2, L2A2, L3A2 facing the image side A2 in the seventh embodiment, as well as the positive and negative refractive index configuration of each lens, are generally similar to those in the first embodiment. However, the radius of curvature, lens thickness, back focal length, and the surface concave-convex configuration of the object side L2A1 and image side L4A2, L5A2 in the seventh embodiment differ from those in the first embodiment. Specifically, the surface concave-convex configuration differs in that the optical axis region L2A1C and the circumferential region L2A1P of the object side L2A1 of the second lens L2 are both concave; the circumferential region L4A2P of the image side L4A2 of the fourth lens L4 is both concave; and the circumferential region L5A2P of the image side L5A2 of the fifth lens L5 is convex. For the optical characteristics and distance values ​​of each lens in the optical lens 7 of this embodiment, please refer to [reference needed]. Figure 32 For the values ​​of each parameter, please refer to [link / reference]. Figure 34B .

[0140] from Figure 31A In the longitudinal spherical aberration, the skewness of each curve shows that the imaging point deviation of off-axis rays at different heights is controlled within -0.002 to 0.008 mm. From... Figure 31B In the field curvature aberration along the sagittal direction, the variations of the three representative wavelengths fall within the range of -0.01 to 0.015 mm. From Figure 31C In the field curvature aberration along the meridional direction, the variations of the three representative wavelengths fall within the range of -0.015 to 0.035 mm. Figure 31D The distortion aberration of the optical lens 7 is maintained within the range of -45% to 0%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and meridional directions of this embodiment are smaller.

[0141] The data above shows that the various optical characteristics of the optical lens 7 meet the quality requirements of the optical system. The optical lens 7 in this embodiment expands the half-field of view (HFOV) to 58.585 degrees and shortens the system length to 3.646 mm, while effectively providing better optical quality compared to existing optical lenses.

[0142] Figure 34A , 34BThe values of D11, D51, HFOV*(T5+T3) / (ImgH*Fno), (D11*0.5) / ImgH, (D51*0.5) / ImgH, V1+V3-2V4, V1+V2+V4, (T2+T3+T4+T5) / (AAG*Fno), D21t41 / BFL, TTL / (T1+T2), TL / (G34+G45), D31t52 / (T1+G23), Tmax / EFL, ALT / (T1+T4), T2 / T1, (T3+T5) / EFL, ALT / EFL, (T2+T3+T5) / BFL, ALT / ImgH, ImgH / (T1+G23), TTL / (ImgH*Fno), HFOV*EFL / (BFL+G23) and HFOV*ImgH / BFL of the above seven embodiments, and the detailed optical data of each embodiment, it can be seen that the optical lens of the present application can indeed satisfy at least any one of the aforementioned conditional expressions (1), (2) and / or conditional expressions (3)-(19). Secondly, the numerical range including the maximum and minimum values obtained by the combination of the optical parameters disclosed in each embodiment herein can all belong to the scope of the present application.

[0143] The longitudinal spherical aberration, the field curvature aberration and the distortion aberration of each embodiment of the optical lens of the present application all conform to the use specifications. In addition, the off-axis light rays at different heights of the three representative wavelengths are all concentrated near the imaging point, and the deviation of the imaging point of the off-axis light rays at different heights is controlled by the deflection amplitude of each curve, thereby having good spherical aberration, aberration and distortion suppression capability. Further referring to the optical quality data, the distances between the three representative wavelengths are also quite close, which shows that the present application has excellent color dispersion suppression capability in various states. In summary, the present application can produce excellent optical quality by the design and mutual matching of the lenses.

[0144] The disclosed content of each embodiment of the present application includes but is not limited to the 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 in each embodiment, and the specific explanations of the range covered by the optical parameters, the comparison relationship between the optical parameters and the conditional expression range covered by the multiple embodiments are as follows:

[0145] (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, α1 is the maximum value of the optical parameter A in the multiple embodiments, α2 is the minimum value of the optical parameter A in the multiple embodiments, β1 is the maximum value of the optical parameter B in the multiple embodiments, and β2 is the minimum value of the optical parameter B in the multiple embodiments.

[0146] (2) The comparison relationship between the optical parameters, for example: A is greater than B or A is less than B.

[0147] (3) The conditional ranges covered by the embodiments, in particular, the combination relations or proportional relations obtained by possible operations of the plurality of optical parameters of the same embodiment, which are 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 conditional expression E≦γ1 or E≧γ2 or γ2≦E≦γ1, γ1 and γ2 are the values obtained by the operation of the optical parameter A and the optical parameter B of 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.

[0148] The ranges covered by the above-mentioned optical parameters, the comparison relations 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 conditional expression are all the features that can be implemented by the present application, and all belong to the scope disclosed by the present application. The above is only an example and should not be limited.

[0149] 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, including but not limited to the combination of surface shape, refractive rate and conditional expression. 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 for demonstration of the present application and are not limited thereto.

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, and a fifth lens, wherein each of the first to fifth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes, wherein: The optical axis region on the side of the first lens is concave; The second lens has a positive refractive index, and a circumferential region on the image side of the second lens is convex. The optical axis region on the image side of the fourth lens is concave; The optical axis region on the image side of the fifth lens is convex; and The optical lens consists of the above five lenses and satisfies the following condition: 22.700 degrees ≤ HFOV*(T5+T3) / (ImgH*Fno) and 0.650 ≤ (D11*0.5) / ImgH ≤ 1.100, where HFOV represents the half angle of view of the optical lens, T5 represents the thickness of the fifth lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, ImgH represents the image height of the optical lens, Fno represents the aperture value of the optical lens, and D11 represents the distance between the two points formed by the maximum straight-line distance formed by the outermost edge contour of the object side of the first 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, and a fifth lens, wherein each of the first to fifth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes, wherein: The optical axis region on the side of the first lens is concave; The second lens has a positive refractive index, and one optical axis region of the image side of the second lens is convex. The optical axis region on the image side of the fourth lens is concave; The optical axis region on the image side of the fifth lens is convex; and The optical lens consists of the above five lenses and satisfies the following conditions: 22.700 degrees ≤ HFOV*(T5+T3) / (ImgH*Fno) and 0.650 ≤ (D11*0.5) / ImgH ≤ 1.100, where HFOV represents the half angle of view of the optical lens, T5 represents the thickness of the fifth lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, ImgH represents the image height of the optical lens, Fno represents the aperture value of the optical lens, and D11 represents the distance between the two points formed by the maximum straight-line distance of the outermost edge contour of the object side of the first 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, and a fifth lens, wherein each of the first to fifth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes, wherein: The optical axis region on the side of the first lens is concave; The second lens has a positive refractive index, and the optical axis region of the image side of the second lens is convex. A circumferential region on the side of the object of the third lens is convex. A circumferential region on the object side of the fourth lens is concave, and an optical axis region on the image side of the fourth lens is also concave; and The optical lens consists of the above five lenses and satisfies the following condition: 22.700 degrees ≤ HFOV*(T5+T3) / (ImgH*Fno) and 0.650 ≤ (D11*0.5) / ImgH ≤ 1.100, where HFOV represents the half angle of view of the optical lens, T5 represents the thickness of the fifth lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, ImgH represents the image height of the optical lens, Fno represents the aperture value of the optical lens, and D11 represents the distance between the two points formed by the maximum straight-line distance formed by the outermost edge contour of the object side of the first lens.

4. The optical lens as described in any one of claims 1 to 3, wherein the optical lens further satisfies V1+V2+V4≧120.000, where V1 represents the Vd Abbe number of the first lens, V2 represents the Vd Abbe number of the second lens, and V4 represents the Vd Abbe number of the fourth lens.

5. The optical lens as described in any one of claims 1 to 3, wherein the optical lens further satisfies (T2+T3+T4+T5) / (AAG*Fno)≧0.500, where T2 represents the thickness of the second lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, T4 represents the thickness of the fourth lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, AAG represents the sum of the distances on the optical axis from the image side of the first lens to the object side of the second lens, the distances on the optical axis from the image side of the second lens to the object side of the third lens, the distances on the optical axis from the image side of the third lens to the object side of the fourth lens, and the distances on the optical axis from the image side of the fourth lens to the object side of the fifth lens, and Fno represents the aperture value of the optical lens.

6. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies D21t41 / BFL ≥ 1.000, where D21t41 represents the distance on the optical axis from the object side of the second lens to the object side of the fourth lens, and BFL represents the back focal length of the optical lens.

7. The optical lens as described in any one of claims 1 to 3, wherein the optical lens further satisfies TTL / (T1+T2) ≦ 4.000, TTL represents the system length of the optical lens, T1 represents the thickness of the first lens on the optical axis, and T2 represents the thickness of the second lens on the optical axis.

8. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies TL / (G34+G45)≧15.000, where TL represents the distance on the optical axis from the object side of the first lens to the image side of the fifth lens, G34 represents the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, and G45 represents the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens.

9. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies D31t52 / (T1+G23)≧2.500, where D31t52 represents the distance on the optical axis from the object side of the third lens to the image side of the fifth lens, T1 represents the thickness of the first lens on the optical axis, and G23 represents the distance on the optical axis from the image side of the second lens to the object side of the third lens.

10. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies Tmax / EFL ≥ 0.500, where Tmax represents the maximum value of the five lens thicknesses of the first lens to the fifth lens on the optical axis, and EFL represents the system focal length of the optical lens.

11. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies ALT / (T1+T4)≧3.000, where ALT represents the total thickness of the five lenses from the first lens to the fifth lens on the optical axis, T1 represents the thickness of the first lens on the optical axis, and T4 represents the thickness of the fourth lens on the optical axis.

12. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies T2 / T1 ≥ 1.500, where T2 represents the thickness of the second lens on the optical axis and T1 represents the thickness of the first lens on the optical axis.

13. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies (T3+T5) / EFL≧0.500, where EFL represents the system focal length of the optical lens.

14. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies ALT / EFL ≥ 3.000, where ALT represents the total thickness of the five lenses from the first lens to the fifth lens on the optical axis, and EFL represents the system focal length of the optical lens.

15. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies (T2+T3+T5) / BFL≧1.000, where T2 represents the thickness of the second lens on the optical axis and BFL represents the back focal length of the optical lens.

16. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies ALT / ImgH ≥ 2.000, where ALT represents the total thickness of the five lenses from the first lens to the fifth lens on the optical axis.

17. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies ImgH / (T1+G23)≦3.500, where T1 represents the thickness of the first lens on the optical axis, and G23 represents the distance on the optical axis from the image side of the second lens to the object side of the third lens.

18. The optical lens according to any one of claims 1 to 3, wherein the optical lens further satisfies TTL / (ImgH*Fno)≧0.800, where TTL represents the system length of the optical lens.

19. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies HFOV*EFL / (BFL+G23)≦70.000 degrees, where EFL represents the system focal length of the optical lens, BFL represents the back focal length of the optical lens, and G23 represents the distance on the optical axis from the image side of the second lens to the object side of the third lens.

20. The optical lens as claimed in any one of claims 1 to 3, wherein the optical lens further satisfies HFOV*ImgH / BFL≦75.000 degrees, where BFL represents the back focal length of the optical lens.

Images