Optical lens

Abstract

An optical lens includes, in order from an object side to an image side, a first lens to a seventh lens, and diopters of the first lens to the seventh lens are negative, negative, positive, positive, negative, positive and negative, respectively. The focal length of the first lens is f1; the focal length of the third lens is f3; the distance from the object side surface of the first lens to the imaging surface is TTL. The optical lens satisfies the conditions that TTL is less than or equal to 28mm and f1 / f3 is more than or equal to-1.7 and less than or equal to-0.6. The optical lens provided by the utility model has the characteristics of wide viewing angle, low distortion, good imaging quality and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to an optical lens, and in particular to an optical lens with wide viewing angle, low distortion and good imaging quality. BACKGROUND

[0002] In recent years, with the application of the camera device more and more widely and diversely, the requirement for the optical image quality of the camera device is also improved. In order to increase the competitive advantage in the market, wide viewing angle, low distortion and high image quality have been the goal pursued by product developers.

[0003] Therefore, it is urgent to provide a new optical lens with wide viewing angle, low distortion and good imaging quality. SUMMARY

[0004] The utility model relates to an optical lens with wide viewing angle, low distortion and good imaging quality.

[0005] The utility model provides an optical lens. The optical lens comprises, in order from an object side to an image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The focal length of the first lens is f1, the focal length of the third lens is f3, the distance from the object side surface of the first lens to the image plane is TTL, and the optical lens satisfies the conditions of TTL≤28mm and -1.7≤f1 / f3≤-0.6.

[0006] The utility model further provides an optical lens. The optical lens comprises, in order from an object side to an image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The focal length of the optical lens is F, the distance from the object side surface of the first lens to the image plane is TTL, the interval distance between the image side surface of the third lens and the object side surface of the fourth lens is d, and the optical lens satisfies the conditions of TTL≤28mm and at least one of the following conditions: 0.1≤d / F≤0.45 and 0.25mm≤d≤1.2mm.

[0007] The utility model discloses an optical lens. The optical lens comprises, in order from an object side to an image side: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power. A distance from an object side surface of the first lens to an image plane is TTL, a radius of curvature of the object side surface of the first lens is R1, a radius of curvature of an image side surface of the first lens is R2, and the optical lens satisfies at least one of the following conditions: TTL≤28mm, R1≤20mm, and 2mm≤R2≤6mm.

[0008] In an embodiment, the optical lens further satisfies at least one of the following conditions: 9.5mm≤TTL, 0.05≤F / TTL≤0.3, and 0.05≤R2 / R1≤0.4.

[0009] In an embodiment, the optical lens has an image height ImgH, and further satisfies at least one of the following conditions: 1.8mm≤ImgH≤5.3mm and 0.5≤F / ImgH≤0.8.

[0010] In an embodiment, the optical lens further satisfies the condition 0.1≤d / F≤0.45, where d is a distance between the image side surface of the third lens and the object side surface of the fourth lens.

[0011] In an embodiment, the optical lens further satisfies at least one of the following conditions: 0.7≤f3 / f4567≤1.5, 0.8≤|f123 / f4567|≤30, and f123 / f4567≤-1, where f123 is an effective focal length of the first lens, the second lens, and the third lens, and f4567 is an effective focal length of the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

[0012] In an embodiment, the optical lens further satisfies at least one of the following conditions: 0.8≤f3 / f4≤2 and 0.3≤f4 / f6≤1.5, where f4 is a focal length of the fourth lens, and f6 is a focal length of the sixth lens.

[0013] In one embodiment of the optical lens of the present invention, the image-side surface of the seventh lens has a critical point, the distance from the critical point to an optical axis is h14, the effective radius of the seventh lens is H14, the extension length from the intersection of the image-side surface of the seventh lens and the optical axis to the position projected onto the optical axis from the critical point is d2, the thickness of the seventh lens on the optical axis is D7, and the optical lens also satisfies at least one of the following conditions: 0.6≤h14 / H14≤0.9, 0.12≤d2 / D7≤0.4, and 8≤H14 / d2≤20.

[0014] In one embodiment of the optical lens of the present invention, the aperture value of the optical lens is FNO, the imaging height is ImgH, the field of view is FOV, and the optical lens also satisfies at least one of the following conditions: FOV≥180° and 0.04≤(FNO*TTL) / (FOV*ImgH).

[0015] To provide a better understanding of the above and other aspects of this utility model, specific embodiments are described below in conjunction with the accompanying drawings: Attached Figure Description

[0016] Figure 1 A cross-sectional view of an optical lens according to an embodiment of the present invention is shown.

[0017] Figure 2 A cross-sectional view of an optical lens according to another embodiment of the present invention is shown.

[0018] Figure 3A and Figure 3B Draw them separately Figure 1 and Figure 2 An enlarged view of the seventh lens in the image.

[0019] Figure 4A List Figure 1 Detailed data on the parameters of each lens in the specific implementation of the optical lens;

[0020] Figure 4B List Figure 1 The aspherical mathematical coefficients of the optical lens;

[0021] Figure 5A List Figure 2 Detailed data on the parameters of each lens in the specific implementation of the optical lens;

[0022] Figure 5B List Figure 2 The aspherical mathematical coefficients of the optical lens;

[0023] Figure 6 List Figure 4A , Figure 5A The specific parameters of the optical lens. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail with reference to the drawings, and the embodiments of the present application will be illustrated. In addition to these detailed descriptions, the present application can be widely applied to other embodiments, and any easy replacement, modification, equivalent change of the embodiments is included in the scope of the present application, and the patent scope is subject to the following. In the description of the specification, in order to enable the reader to have a more complete understanding of the present application, many specific details are provided; however, the present application can still be implemented on the premise of omitting part or all of these specific details. In addition, well-known steps or components are not described in detail to avoid unnecessary limitations of the present application. The same or similar elements in the drawings will be denoted by the same or similar symbols. It should be particularly noted that the drawings are only for illustration and do not represent the actual size or quantity of the elements, unless otherwise specified.

[0025] Figure 1 A cross-sectional view of an optical lens OL1 of an embodiment of the present application is shown; Figure 2 A cross-sectional view of an optical lens OL2 of another embodiment of the present application is shown. In order to show the features of the embodiments, only the optical structures inside the optical lenses OL1, OL2 are shown, and the remaining structures can be designed by the relevant person in the art, which is omitted here.

[0026] The optical lenses OL1, OL2 at least have the characteristics of wide viewing angle, low distortion and good imaging quality, and can be applied to various devices with image projection or image capture functions, including but not limited to handheld computer systems, handheld communication systems, aerial cameras, sports video cameras, vehicle cameras, surveillance systems, webcams, digital cameras, digital video cameras or projectors, etc.

[0027] In Figure 1 and Figure 2 In the above-mentioned embodiments, the left side is the object side, the right side is the image-forming side, and the light beam can penetrate through each lens in the optical lenses OL1, OL2 from the object side and be imaged on the imaging surface I of the image-forming side. In an embodiment, the optical lenses OL1, OL2 sequentially include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 from the object side to the image-forming side, and the above-mentioned seven lenses can be arranged along the optical axis OA. Among them, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 can have a refractive power, respectively.

[0028] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0029] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0030] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0031] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0032] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0033] In one embodiment, the first lens L1 can have a negative refractive power, the second lens L2 can have a negative refractive power, the third lens L3 can have a positive refractive power, the fourth lens L4 can have a positive refractive power, the fifth lens L5 can have a negative refractive power, the sixth lens L6 can have a positive refractive power, and the seventh lens L7 can have a negative refractive power.

[0034] In an embodiment, the first lens L1, the second lens L2 and the third lens L3 have an equivalent focal length f123, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 have an equivalent focal length f4567, and the optical lens OL1, OL2 can satisfy at least one condition of 0.8≤|f123 / f4567|, 1≤|f123 / f4567|, |f123 / f4567|≤25, |f123 / f4567|≤28 and |f123 / f4567|≤30.

[0035] In an embodiment, the first lens L1, the second lens L2 and the third lens L3 have a first total refractive power which is negative, and the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 have a second total refractive power which is positive, and the optical lens OL1, OL2 can satisfy a condition of f123 / f4567≤-1.

[0036] In an embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.7≤f3 / f4567, 0.8≤f3 / f4567, 0.9≤f3 / f4567, f3 / f4567≤1.4 and f3 / f4567≤1.5.

[0037] A total track length of the optical lens OL1, OL2 is TTL, i.e., a distance from the object side surface S1 of the first lens L1 to the imaging surface I is TTL. In an embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 9.5mm≤TTL, 10.5mm≤TTL, 11mm≤TTL, TTL≤26.5mm, TTL≤27.5mm and TTL≤28mm.

[0038] A focal length of the optical lens OL1, OL2 is F. In an embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.05≤F / TTL, 0.07≤F / TTL, 0.1≤F / TTL, F / TTL≤0.13, F / TTL≤0.15, F / TTL≤0.2 and F / TTL≤0.3.

[0039] The optical lens OL1, OL2 can converge a light beam passing through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 to the imaging surface I. In an embodiment, if an imaging height of an object on the imaging surface I is ImgH, i.e., a radius of an imaging circle on the imaging surface I is ImgH, the optical lens OL1, OL2 can satisfy at least one condition of 1.8mm≤ImgH, 2mm≤ImgH, ImgH≤4.7mm, ImgH≤5mm and ImgH≤5.3mm.

[0040] In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.5≤F / ImgH, 0.52≤F / ImgH, 0.58≤F / ImgH, F / ImgH≤0.65, F / ImgH≤0.7 and F / ImgH≤0.8.

[0041] The distance between the first lens group G1 and the second lens group G2 of the optical lens OL1, OL2 is d, i.e., the interval distance between the image-side surface S6 of the third lens L3 and the object-side surface S7 of the fourth lens L4 on the optical axis OA is d. In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.25mm≤d, 0.35mm≤d, d≤1.2mm.

[0042] In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.1≤d / F, 0.2≤d / F, 0.25≤d / F, d / F≤0.4 and d / F≤0.45.

[0043] Figure 3A and Figure 3B respectively. Figure 1 and Figure 2 respectively. Figure 3A and Figure 3B The image-side surface S14 of the seventh lens L7 intersects the optical axis OA at an intersection point P1; the image-side surface S14 has a critical point P2, wherein the critical point P2 is a tangent point on the image-side surface S14, except for the intersection point with the optical axis OA, which is tangent to a tangent plane perpendicular to the optical axis OA. The critical point P2 of the image-side surface S14 is a convex critical point, i.e., the critical point P2 is the position on the image-side surface S14 closest to the imaging plane I. The distance from the critical point P2 to the optical axis OA is h14, and the effective radius of the seventh lens L7 is H14. In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.6≤h14 / H14, 0.65≤h14 / H14, h14 / H14≤0.73, h14 / H14≤0.8 and h14 / H14≤0.9.

[0044] As shown in Figure 3A and Figure 3B , the extended length of the position of the intersection point P1 to the critical point P2 projected to the optical axis OA is d2, and the thickness of the seventh lens L7 on the optical axis OA is D7. In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 0.12≤d2 / D7, 0.15≤d2 / D7, d2 / D7≤0.35 and d2 / D7≤0.4; in another embodiment, the optical lens OL1, OL2 can satisfy at least one condition of 8≤H14 / d2, 11≤H14 / d2, H14 / d2≤15, H14 / d2≤16, H14 / d2≤18, H14 / d2≤20.

[0045] With reference to Figure 1 and Figure 2 The field of view of the optical lens OL1, OL2 is FOV. The optical lens OL1, OL2 further comprises a stop STO, which can be disposed between the third lens L3 and the fourth lens L4. The stop value of the stop STO is FNO. In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of FOV≥180°, 0.04≤(FNO*TTL) / (FOV*ImgH), (FNO*TTL) / (FOV*ImgH)≤0.1 and (FNO*TTL) / (FOV*ImgH)≤0.12.

[0046] The first lens L1 has a refractive index N1 and an Abbe number V1, the second lens L2 has a refractive index N2 and an Abbe number V2, the third lens L3 has a refractive index N3 and an Abbe number V3, the fourth lens L4 has a refractive index N4 and an Abbe number V4, the fifth lens L5 has a refractive index N5 and an Abbe number V5, the sixth lens L6 has a refractive index N6 and an Abbe number V6, and the seventh lens L7 has a refractive index N7 and an Abbe number V7. In one embodiment, the optical lens OL1, OL2 can satisfy at least one condition of N3>N1, N1>N5, N5>N2, N5>N4, N5>N6, V3>V5, V1>V3, V2>V3, V4>V3 and V6>V3.

[0047] In one embodiment, the optical lens OL1, OL2 can further satisfy at least one condition of N3-N1>0.05, N1-N5>0.05, N5-N2>0.05, N5-N4>0.05, N5-N6>0.05, V3-V5>5, V1-V3>5, V2-V3>5, V4-V3>5 and V6-V3>5.

[0048] In one embodiment, the optical lens OL1, OL2 can further comprise a protective sheet C; in another embodiment, an imaging element IMA, such as an image capturing unit, can be disposed on the imaging surface I to perform photoelectric conversion on the light beam passing through the optical lens OL1, OL2. The protective sheet C can be disposed between the seventh lens L7 and the imaging element IMA, and a filter film (not shown) can be formed on the protective sheet C; in still another embodiment, a protective sheet C integrated with the functions of protecting the image capturing unit and filtering infrared light beams can be used.

[0049] In addition, in one embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 can be a glass lens made of a glass material or a plastic lens made of a plastic material, respectively. The plastic lens can include, but is not limited to, polycarbonate, cyclic olefin copolymer (e.g., APEL), and polyester resin (e.g., OKP4 or OKP4HT), or can be a mixed and / or alloyed material including at least one of the foregoing. In one embodiment, the optical lens OL1, OL2 can include at least 5 plastic lenses, so that the optical lens OL1, OL2 has a low cost characteristic.

[0050] Further, in one embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 can be a spherical lens or an aspherical lens, respectively. In a specific embodiment, the second lens L2, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are aspherical lenses.

[0051] Specifically, each aspherical lens has at least one aspherical surface, i.e., the object side surface and / or the image side surface of the aspherical lens is an aspherical surface. Each aspherical surface can satisfy the following mathematical expression:

[0052]

[0053] where Z is a coordinate value in the direction of the optical axis OA, the direction of light transmission is the positive direction, A2, A4, A6, A8, A10, A12, A14 and A16 are aspherical coefficients, K is a quadratic surface constant, C = 1 / R, R is the radius of curvature, and Y is a coordinate value orthogonal to the direction of the optical axis OA, the direction away from the optical axis OA is the positive direction. In addition, the values of each parameter or coefficient of the mathematical expression of each aspherical surface can be set respectively to determine the focal length of each position point of the aspherical surface.

[0054] Figure 4A Listed Figure 1The optical lens OL1 contains detailed data on the parameters of each lens, including the lens type, radius of curvature, thickness, refractive index, and Abbe number (dispersion coefficient). Surface designations S1-S6, ST, S7-S16, and I are sequentially arranged from the object side to the image side. For example, "ST" represents the aperture surface of aperture STO, "S1" and "S2" represent the object-side surface S1 and image-side surface S2 of the first lens L1, respectively, "S15" and "S16" represent the object-side surface S15 and image-side surface S16 of the protective sheet C, respectively, and "I" represents the imaging surface I of the imaging element IMA, etc. Furthermore, "thickness" represents the distance between this surface and an adjacent image-side surface. For example, the "thickness" of the object-side surface S1 is the distance between the object-side surface S1 and the image-side surface S2 of the first lens L1.

[0055] also, Figure 4B List Figure 1 The aspherical mathematical coefficients of the optical lens OL1. If the surfaces of the second lens L2, the fourth lens L4 to the seventh lens L7 of the optical lens OL1 are aspherical surfaces, then the coefficients in the aspherical mathematical formula can be as follows: Figure 4B As shown.

[0056] Figure 5A List Figure 2 The detailed data of each lens parameter in the OL2 optical lens specific implementation method, and their definitions and meanings are roughly the same as... Figure 4A same.

[0057] also, Figure 5B List Figure 2 The aspherical mathematical coefficients of the optical lens OL2. If the surfaces of the second lens L2, the fourth lens L4 to the seventh lens L7 of the optical lens OL2 are aspherical surfaces, then the coefficients in the aspherical mathematical formula can be as follows: Figure 5B As shown.

[0058] Reference Figure 1 , Figure 2 , Figure 4A and Figure 5A The object-side surfaces S1, S3, and S13 of the first lens L1, the second lens L2, and the seventh lens L7 can all be convex surfaces bulging towards the object side, possessing positive refractive indices; the image-side surfaces S2, S4, and S14 of the first lens L1, the second lens L2, and the seventh lens L7 can all be concave surfaces concave towards the object side, possessing positive refractive indices. The first lens L1, the second lens L2, and the seventh lens L7 can be lenses with negative refractive power, including but not limited to convex-concave glass lenses or convex-concave plastic lenses with negative refractive power, and can be spherical lenses or aspherical lenses.

[0059] The object side surface S5, S7, S11 of the third lens L3, the fourth lens L4 and the sixth lens L6 can all be convex surfaces protruding towards the object side, having positive refractive power; the image side surface S6, S8, S12 of the third lens L3, the fourth lens L4 and the sixth lens L6 can all be convex surfaces protruding towards the image side, having negative refractive power. The third lens L3, the fourth lens L4 and the sixth lens L6 can adopt lenses with positive refractive power, including but not limited to double-convex glass lenses or double-convex plastic lenses with positive refractive power, and can be spherical lenses or aspherical lenses.

[0060] The object side surface S9 of the fifth lens L5 can be a concave surface recessing towards the image side, having negative refractive power; the image side surface S10 of the fifth lens L5 can be a concave surface recessing towards the object side, having positive refractive power. The fifth lens L5 can adopt lenses with negative refractive power, including but not limited to double-concave glass lenses or double-concave plastic lenses with negative refractive power, and can be spherical lenses or aspherical lenses respectively.

[0061] Figure 6 The specific parameters of the optical lens OL1 and OL2 are listed as follows. Figure 4A 、 Figure 5A The specific parameters of the optical lens OL1 and OL2 are listed as follows.

[0062] It can be seen from the above embodiments that the optical lens proposed by the utility model can have the characteristics of wide view angle, low distortion and good imaging quality.

[0063] Of course, the utility model also can have other various embodiments, the skilled in the art person can make various corresponding changes and deformation according to the utility model without departing from the spirit and the essence of the utility model, but these corresponding changes and deformation all should belong to the protection scope of the utility model claim.

Claims

1. An optical lens, characterized in that, The focal length of this optical lens is F, and it includes, from the object side to the image side, the following parameters in sequence: A first lens has negative refractive power, the focal length of the first lens is f1, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, and the distance from the object-side surface of the first lens to an imaging plane is TTL. A second lens with negative refractive power; A third lens with positive diopter and a focal length of f3; A fourth lens with positive refractive power; A fifth lens with negative refractive power; A sixth lens, having positive refractive power; and A seventh lens with negative refractive power, and the optical lens satisfies the conditions TTL≤28mm and -1.7≤f1 / f3≤-0.

6.

2. An optical lens, characterized in that, The focal length of this optical lens is F, and it includes, from the object side to the image side, the following parameters in sequence: A first lens has negative refractive power, the object-side surface of the first lens has a radius of curvature of R1, the image-side surface of the first lens has a radius of curvature of R2, and the distance from the object-side surface of the first lens to an imaging plane is TTL. A second lens with negative refractive power; A third lens with positive diopter and a focal length of f3; A fourth lens with positive refractive power; A fifth lens with negative refractive power; A sixth lens, having positive refractive power; and A seventh lens with negative refractive power, the image-side surface of the third lens and the object-side surface of the fourth lens are spaced apart by a distance d, and the optical lens satisfies at least one of the following conditions: TTL≤28mm: 0.1≤d / F≤0.45 and 0.25mm≤d≤1.2mm.

3. An optical lens, characterized in that, The focal length of this optical lens is F, and it includes, from the object side to the image side, the following parameters in sequence: A first lens has negative refractive power, the object-side surface of the first lens has a radius of curvature of R1, the image-side surface of the first lens has a radius of curvature of R2, and the distance from the object-side surface of the first lens to an imaging plane is TTL. A second lens with negative refractive power; A third lens with positive diopter and a focal length of f3; A fourth lens with positive refractive power; A fifth lens with negative refractive power; A sixth lens, having positive refractive power; and A seventh lens with negative refractive power, and the optical lens satisfies at least one of the following conditions: TTL≤28mm and R1≤20mm and 2mm≤R2≤6mm.

4. The optical lens as described in claim 1, 2, or 3, characterized in that, The optical lens also meets at least one of the following conditions: 9.5mm≤TTL, 0.05≤F / TTL≤0.3, and 0.05≤R2 / R1≤0.

4.

5. The optical lens as described in claim 1, 2, or 3, characterized in that, The imaging height of the optical lens is ImgH, and the optical lens also satisfies at least one of the following conditions: 1.8mm≤ImgH≤5.3mm and 0.5≤F / ImgH≤0.

8.

6. The optical lens as described in claim 1 or 3, characterized in that, The distance between the image-side surface of the third lens and the object-side surface of the fourth lens is d, and the optical lens also satisfies the condition 0.1≤d / F≤0.

45.

7. The optical lens as described in claim 1, 2, or 3, characterized in that, The first lens, the second lens, and the third lens have an equivalent focal length of f123, and the fourth lens, the fifth lens, the sixth lens, and the seventh lens have an equivalent focal length of f4567. The optical lens also satisfies at least one of the following conditions: 0.7≤f3 / f4567≤1.5, 0.8≤|f123 / f4567|≤30, and f123 / f4567≤-1.

8. The optical lens as described in claim 1, 2, or 3, characterized in that, The fourth lens has a focal length of f4, the sixth lens has a focal length of f6, and the optical lens also satisfies at least one of the following conditions: 0.8≤f3 / f4≤2 and 0.3≤f4 / f6≤1.

5.

9. The optical lens as described in claim 1, 2, or 3, characterized in that, The image-side surface of the seventh lens has a critical point, the distance from the critical point to an optical axis is h14, the effective radius of the seventh lens is H14, the extension length from the intersection of the image-side surface of the seventh lens and an optical axis to the position projected onto the optical axis from the critical point is d2, the thickness of the seventh lens on the optical axis is D7, and the optical lens also satisfies at least one of the following conditions: 0.6≤h14 / H14≤0.9, 0.12≤d2 / D7≤0.4, and 8≤H14 / d2≤20.

10. The optical lens as described in claim 1, 2, or 3, characterized in that, The optical lens has an aperture of FNO, an imaging height of ImgH, and a field of view of FOV. The optical lens also satisfies at least one of the following conditions: FOV ≥ 180° and 0.04 ≤ (FNO * TTL) / (FOV * ImgH).

Images