Optical lens and camera

Abstract

The present invention discloses an optical lens and a camera. The optical lens includes a negative focal length focusing lens group, a negative focal length fixed lens, and a positive focal length zoom lens group arranged in sequence from the object side to the image side. The negative focal length fixed lens is fixed relative to the optical axis of the optical lens. The negative focal length focusing lens group and the positive focal length zoom lens group can move along the optical axis of the optical lens so that the optical lens has a wide-angle end, a medium focal length end, and a long focal length end. The focal length f1 of the negative focal length focusing lens group, the focal length f2 of the negative focal length fixed lens, and the focal length f3 of the positive focal length zoom lens group satisfy the following conditions: 0.5 < |f1 / fw| < 2, 10 < |f2 / fw| < 100, 0 < |f3 / fw| < 30; where fw is the focal length of the optical lens at the wide-angle end; and 0 < |f1 / f2| < 0.1, 0 < |f1 / f3| < 0.5. The technical solution of the present invention aims to provide an optical lens with a large aperture, an ultra-wide angle, and a long zoom to ensure the image quality of the security monitoring system.

Description

Technical Field

[0001] The present invention relates to the field of optical devices, and particularly to an optical lens and a camera. Background Art

[0002] With the development of society, people's awareness of security prevention has been continuously improved, and the security monitoring industry has also developed rapidly. Monitoring plays an increasingly important role. Telephoto lenses have strong telephoto capabilities and are therefore widely used in long-distance monitoring. Long-distance monitoring requires a large amount of light transmission to ensure the brightness of the image. Therefore, the lens needs to have a large light aperture. However, currently, the common telephoto zoom lenses have a very small aperture and insufficient light transmission, and the images obtained in low-light scenarios are relatively dark, making it difficult to ensure the image quality of the security monitoring system. Summary of the Invention

[0003] The main object of the present invention is to propose an optical lens, aiming to provide an optical lens with a large aperture, ultra-wide angle, and long zoom to ensure the image quality of the security monitoring system.

[0004] To achieve the above object, the optical lens proposed by the present invention includes a negative focal length focusing lens group, a negative focal length fixed lens, and a positive focal length varifocal lens group arranged in sequence from the object side to the image side. The negative focal length fixed lens is fixed relative to the optical axis of the optical lens, and the negative focal length focusing lens group and the positive focal length varifocal lens group can move along the optical axis of the optical lens so that the optical lens has a wide-angle end, a mid-focal end, and a telephoto end;

[0005] The negative focal length focusing lens group includes a first negative focal length focusing lens, a second negative focal length focusing lens, a third negative focal length focusing lens, a fourth negative focal length focusing lens, a fifth negative focal length focusing lens, a sixth positive focal length focusing lens, and a seventh negative focal length focusing lens arranged in sequence from the object side to the image side;

[0006] The negative focal length fixed lens is set as a convex-concave lens convexly provided towards the object side;

[0007] The positive focal length varifocal lens group includes a first positive focal length varifocal lens, a second positive focal length varifocal lens, a third negative focal length varifocal lens, a fourth positive focal length varifocal lens, a fifth negative focal length varifocal lens, and a sixth positive focal length varifocal lens arranged in sequence from the object side to the image side;

[0008] The focal length f1 of the negative focal length focusing lens group, the focal length f2 of the negative focal length fixed lens, and the focal length f3 of the positive focal length varifocal lens group satisfy the following conditions:

[0009] 0.5 < |f1 / f w | < 2, 10 < |f2 / f w | < 100, 0 < |f3 / f w | < 30; where fw is the focal length of the optical lens at the wide-angle end; and

[0010] 0 < |f1 / f2| < 0.1, 0 < |f1 / f3| < 0.5.

[0011] Optionally, the first negative focal length focusing lens, the second negative focal length focusing lens, the third negative focal length focusing lens, the fourth negative focal length focusing lens, and the sixth positive focal length focusing lens are all meniscus lenses convex toward the object side, and the fifth negative focal length focusing lens and the seventh negative focal length focusing lens are both biconcave lenses;

[0012] The first positive focal length zoom lens, the second positive focal length zoom lens, the fourth positive focal length zoom lens, and the sixth positive focal length zoom lens are all biconvex lenses, and the third negative focal length zoom lens and the fifth negative focal length zoom lens are both biconcave lenses.

[0013] Optionally, the radius of curvature r of the surface of the third negative focal length focusing lens close to the image side 1R and the radius of curvature r of the surface of the third negative focal length focusing lens close to the object side 1L satisfy the following conditions:

[0014] 0 < (r 1R + r 1L ) / (r 1L - r 1R ) < 50;

[0015] The radius of curvature r of the surface of the negative focal length fixed lens close to the image side 2R and the radius of curvature r of the surface of the negative focal length fixed lens close to the object side 2L satisfy the following conditions:

[0016] 0 < (r 2R + r 2L ) / (r 2L - r 2R ) < 30;

[0017] The radius of curvature r of the surface of the first positive focal length zoom lens close to the image side 3R and the radius of curvature r of the surface of the first positive focal length zoom lens close to the object side 3L satisfy the following conditions:

[0018] -5 < (r 3R + r 3L ) / (r 3L - r 3R ) < 0.

[0019] Optionally, the second negative focal length focusing lens, the negative focal length fixed lens, and the sixth positive focal length zoom lens are all aspherical lenses.

[0020] Optionally, the second negative focal focusing lens and the sixth positive focal zoom lens are made of glass, and the negative focal fixed lens is made of plastic.

[0021] Optionally, the distance d1 between the first negative focal focusing lens and the second negative focal focusing lens satisfies: 1 mm < d1 < 5.5 mm;

[0022] The distance d2 between the third negative focal focusing lens and the fourth negative focal focusing lens satisfies: 3 mm < d2 < 8 mm;

[0023] The distance d3 between the first positive focal zoom lens and the second positive focal zoom lens satisfies: 0.1 mm < d3 < 0.8 mm.

[0024] Optionally, the focal length f of the first negative focal focusing lens 11 satisfies: -80 mm < f 11 < -20 mm, and the focal length f of the second negative focal focusing lens 12 satisfies: -50 mm < f 12 < -5 mm, and the focal length f of the third negative focal focusing lens 13 satisfies: -55 mm < f 13 < -10 mm, the focal length f of the fourth negative focal focusing lens 14 satisfies: -1000 mm < f 14 < -50 mm, the focal length f of the fifth negative focal focusing lens 15 satisfies: -40 mm < f 15 < -10 mm, the focal length f of the sixth positive focal focusing lens 16 satisfies: 10 mm < f 16 < 45 mm, the focal length f of the seventh negative focal focusing lens 17 satisfies: -40 mm < f 17 < -15 mm;

[0025] The focal length f2 of the negative focal fixed lens satisfies: -200 mm < f2 < -50 mm;

[0026] The focal length f of the first positive focal zoom lens 31 satisfies: 5 mm < f 31 < 40 mm, the focal length f of the second positive focal zoom lens 32 satisfies: 15 mm < f 32 < 80 mm, the focal length f of the third negative focal zoom lens 33 satisfies: -60 mm < f 33 < -15 mm, the focal length f of the fourth positive focal zoom lens 34 satisfies: 3 mm < f34 <25 mm, the focal length f of the fifth negative optical power variable-focus lens 35 satisfies: -30 mm < f 35 <-9 mm, the focal length f of the sixth positive optical power variable-focus lens 36 satisfies: f 36 > 50 mm.

[0027] Optionally, the refractive index n of the first negative optical power focusing lens 11 satisfies: 1.7 < n 11 <1.95, the refractive index n of the second negative optical power focusing lens 12 satisfies: 1.7 < n 12 <1.95, the refractive index n of the third negative optical power focusing lens 13 satisfies: 1.55 < n 13 <1.8, the refractive index n of the fourth negative optical power focusing lens 14 satisfies: 1.65 < n 14 <1.88, the refractive index n of the fifth negative optical power focusing lens 15 satisfies: 1.55 < n 15 <1.8, the refractive index n of the sixth positive optical power focusing lens 16 satisfies: 1.65 < n 16 <1.88, the refractive index n of the seventh negative optical power focusing lens 17 satisfies: 1.5 < n 17 <1.7;

[0028] The refractive index n2 of the negative optical power fixed lens satisfies: 1.45 < n2 < 1.75;

[0029] The refractive index n of the first positive optical power variable-focus lens 31 satisfies: 1.4 < n 31 <1.65, the refractive index n of the second positive optical power variable-focus lens 32 satisfies: 1.45 < n 32 <1.85, the refractive index n of the third negative optical power variable-focus lens 33 satisfies: 1.65 < n 33 <2.05, the refractive index n of the fourth positive optical power variable-focus lens 34 satisfies: 1.6 < n 34 <1.95, the refractive index n of the fifth negative optical power variable-focus lens 35 satisfies: 1.65 < n 35 <2.05, the refractive index n of the sixth positive optical power variable-focus lens 36 satisfies: 1.4 < n 36 <1.75.

[0030] Optionally, an aperture stop is disposed on a side of the fourth positive-power zoom lens facing the object side.

[0031] The present invention further provides a camera, including the foregoing optical lens.

[0032] In the technical solution of the present invention, by configuring the negative-power focusing lens group and the positive-power zoom lens group as described above, and making the focal length f1 of the negative-power focusing lens group, the focal length f2 of the negative-power fixed lens, and the focal length f3 of the positive-power zoom lens group satisfy corresponding conditions, the optical lens can simultaneously have the characteristics of a large aperture, an ultra-wide angle, and a long zoom, so as to ensure the image quality of the security monitoring system. Moreover, the separation of positive and negative optical powers is achieved, and the image surface curvature of the optical lens can be effectively corrected to ensure the imaging quality of the optical lens. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the optical lens of the present invention;

[0035] Figure 2 It is a spherical aberration diagram of the optical lens of the present invention in the visible light band at the wide-angle end;

[0036] Figure 3 It is an astigmatism field curvature diagram (left) and a distortion diagram (right) of the optical lens of the present invention in the visible light band at the wide-angle end;

[0037] Figure 4 It is a spherical aberration diagram of the optical lens of the present invention in the visible light band at the mid-focal length end;

[0038] Figure 5 It is an astigmatism field curvature diagram (left) and a distortion diagram (right) of the optical lens of the present invention in the visible light band at the mid-focal length end;

[0039] Figure 6 It is a spherical aberration diagram of the optical lens of the present invention in the visible light band at the long-focal length end;

[0040] Figure 7 It is an astigmatism field curvature diagram (left) and a distortion diagram (right) of the optical lens of the present invention in the visible light band at the long-focal length end.

[0041] Explanation of the reference numerals in the drawings:

[0042]

[0043]

[0044] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0047] Terms such as "connection", "installation", "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0049] The present invention provides an optical lens.

[0050] In an embodiment of the present invention, as Figure 1As shown in the figure, the optical lens includes a negative focal length focusing lens group 100, a negative focal length fixed lens 200, and a positive focal length zoom lens group 300 arranged in sequence from the object side to the image side. The negative focal length fixed lens 200 is fixed relative to the optical axis of the optical lens. The negative focal length focusing lens group 100 and the positive focal length zoom lens group 300 can move along the optical axis of the optical lens so that the optical lens has a wide-angle end, a medium focal length end, and a long focal length end;

[0051] The negative focal length focusing lens group 100 includes a first negative focal length focusing lens 101, a second negative focal length focusing lens 102, a third negative focal length focusing lens 103, a fourth negative focal length focusing lens 104, a fifth negative focal length focusing lens 105, a sixth positive focal length focusing lens 106, and a seventh negative focal length focusing lens 107 arranged in sequence from the object side to the image side;

[0052] The positive focal length zoom lens group 300 includes a first positive focal length zoom lens 301, a second positive focal length zoom lens 302, a third negative focal length zoom lens 303, a fourth positive focal length zoom lens 304, a fifth negative focal length zoom lens 305, and a sixth positive focal length zoom lens 306 arranged in sequence from the object side to the image side;

[0053] The focal length f1 of the negative focal length focusing lens group 100, the focal length f2 of the negative focal length fixed lens 200, and the focal length f3 of the positive focal length zoom lens group 300 satisfy the following conditions:

[0054] 0.5 < |f1 / f w | < 2, 10 < |f2 / f w | < 100, 0 < |f3 / f w | < 30; where f w is the focal length of the optical lens at the wide-angle end; and

[0055] 0 < |f1 / f2| < 0.1, 0 < |f1 / f3| < 0.5.

[0056] In the technical solution of the present invention, by configuring the negative focal length focusing lens group 100 and the positive focal length zoom lens group 300 as above, and making the focal length f1 of the negative focal length focusing lens group 100, the focal length f2 of the negative focal length fixed lens 200, and the focal length f3 of the positive focal length zoom lens group 300 satisfy the corresponding conditions, the optical lens can simultaneously have the characteristics of a large aperture, an ultra-wide angle, and a long zoom to ensure the image quality of the security monitoring system. Moreover, the separation of positive and negative focal powers is achieved, and the image surface curvature of the optical lens can be effectively corrected to ensure the imaging quality of the optical lens.

[0057] Further, in this embodiment, the first negative focal length focusing lens 101, the second negative focal length focusing lens 102, the third negative focal length focusing lens 103, the fourth negative focal length focusing lens 104, and the sixth positive focal length focusing lens 106 are all convex-concave lenses convexly provided towards the object side, and the fifth negative focal length focusing lens 105 and the seventh negative focal length focusing lens 107 are both biconcave lenses; the negative focal length fixed lens 200 is provided as a meniscus lens convexly provided towards the object side; the first positive focal length zoom lens 301, the second positive focal length zoom lens 302, the fourth positive focal length zoom lens 304, and the sixth positive focal length zoom lens 306 are all biconvex lenses, and the third negative focal length zoom lens 303 and the fifth negative focal length zoom lens 305 are both biconcave lenses. In this way, while meeting the optical power of each lens, the structure of the optical system can be made compact, which is beneficial to reducing the overall optical length of the optical system, thereby reducing the volume of the optical lens.

[0058] Further, in this embodiment, the second negative focal length focusing lens 102, the negative focal length fixed lens 200, and the sixth positive focal length zoom lens 306 are all aspherical lenses. In this way, the aberration of the optical system can be corrected by the aspherical lens, the image quality of the optical lens can be improved, and the aperture sizes at the wide-angle end and the telephoto end can be balanced. At the same time, it is also beneficial to reduce the volume of the optical lens. In addition, the aspherical lens also has good thermal aberration characteristics, and it can be used to keep the optical lens in good image quality within a large temperature range. Specifically, the materials of the second negative focal length focusing lens 102 and the sixth positive focal length zoom lens 306 are glass materials. Glass has higher light transmittance, less stray light, and smaller aberration, which is beneficial to reducing the chromatic aberration of the optical system to ensure the imaging quality of the optical lens. The material of the negative focal length fixed lens 200 is a plastic material. Plastic has low cost and is easy to process, which is beneficial to reducing the production cost of the optical lens. In addition, the materials of other lenses are all glass materials to ensure the imaging quality of the optical lens.

[0059] Further, in this embodiment, the radius of curvature r 1R of the surface of the third negative focal length focusing lens 103 close to the image side 1L and the radius of curvature r

[0060] of the surface of the third negative focal length focusing lens 103 close to the object side 1R satisfy the following conditions: 1L 0 < (r 1L + r 1R ) / (r

[0061] The radius of curvature r 2R of the surface of the negative focal length fixed lens 200 close to the image side 2L and the radius of curvature r

[0062] 0 < (r 2R + r 2L ) / (r 2L - r 2R ) < 30;

[0063] The radius of curvature r of the surface of the first positive optical power zoom lens 301 closer to the image side 3R and the radius of curvature r of the surface closer to the object side thereof 3L satisfy the following conditions:

[0064] -5 < (r 3R + r 3L ) / (r 3L - r 3R ) < 0.

[0065] Furthermore, in this embodiment, the distance d1 between the first negative optical power focusing lens 101 and the second negative optical power focusing lens 102 satisfies: 1 mm < d1 < 5.5 mm;

[0066] The distance d2 between the third negative optical power focusing lens 103 and the fourth negative optical power focusing lens 104 satisfies: 3 mm < d2 < 8 mm;

[0067] The distance d3 between the first positive optical power zoom lens 301 and the second positive optical power zoom lens 302 satisfies: 0.1 mm < d3 < 0.8 mm.

[0068] Furthermore, in this embodiment, the focal length f of the first negative optical power focusing lens 101 11 satisfies: -80 mm < f 11 < -20 mm, the focal length f of the second negative optical power focusing lens 102 12 satisfies: -50 mm < f 12 < -5 mm, the focal length f of the third negative optical power focusing lens 103 13 satisfies: -55 mm < f 13 < -10 mm, the focal length f of the fourth negative optical power focusing lens 104 14 satisfies: -1000 mm < f 14 < -50 mm, the focal length f of the fifth negative optical power focusing lens 105 15 satisfies: -40 mm < f 15 < -10 mm, the focal length f of the sixth positive optical power focusing lens 106 16 satisfies: 10 mm < f 16 < 45 mm, the focal length f of the seventh negative optical power focusing lens 107 17 satisfies: -40 mm < f 17 < -15 mm;

[0069] The focal length f2 of the negative focal length fixed lens 200 satisfies: -200 mm < f2 < -50 mm;

[0070] The focal length f of the first positive focal length variable magnification lens 301 31 satisfies: 5 mm < f 31 < 40 mm, the focal length f of the second positive focal length variable magnification lens 302 32 satisfies: 15 mm < f 32 < 80 mm, the focal length f of the third negative focal length variable magnification lens 303 33 satisfies: -60 mm < f 33 < -15 mm, the focal length f of the fourth positive focal length variable magnification lens 304 34 satisfies: 3 mm < f 34 < 25 mm, the focal length f of the fifth negative focal length variable magnification lens 305 35 satisfies: -30 mm < f 35 < -9 mm, the focal length f of the sixth positive focal length variable magnification lens 306 36 satisfies: f 36 > 50 mm.

[0071] In this way, by adjusting the radii of curvature of the third negative focal length focusing lens 103, the negative focal length fixed lens 200, and the first positive focal length variable magnification lens 301 as described above, and by adjusting the distance d1 between the first negative focal length focusing lens 101 and the second negative focal length focusing lens 102, the distance d2 between the third negative focal length focusing lens 103 and the fourth negative focal length focusing lens 104, and the distance d3 between the first positive focal length variable magnification lens 301 and the second positive focal length variable magnification lens 302 as described above, and by adjusting the focal lengths of the respective lenses as described above, it is possible to further optimize the characteristics of the large aperture, ultra-wide angle, and long zoom of the optical lens to ensure the image quality of the security monitoring system.

[0072] Furthermore, in this embodiment, the refractive index n of the first negative focal length focusing lens 101 11 satisfies: 1.7 < n 11 < 1.95, the refractive index n of the second negative focal length focusing lens 102 12 satisfies: 1.7 < n 12 < 1.95, the refractive index n of the third negative focal length focusing lens 103 13 satisfies: 1.55 < n 13 < 1.8, the refractive index n of the fourth negative focal length focusing lens 104 14 satisfies: 1.65 < n 14 < 1.88, the refractive index n of the fifth negative focal length focusing lens 105 15 satisfies: 1.55 < n 15<1.8, the refractive index n of the sixth positive power focusing lens 106 16 Satisfies: 1.65 < n 16 <1.88, the refractive index n of the seventh negative power focusing lens 107 17 Satisfies: 1.5 < n 17 <1.7;

[0073] The refractive index n2 of the negative power fixed lens 200 satisfies: 1.45 < n2 < 1.75;

[0074] The refractive index n of the first positive power variable magnification lens 301 31 Satisfies: 1.4 < n 31 <1.65, the refractive index n of the second positive power variable magnification lens 302 32 Satisfies: 1.45 < n 32 <1.85, the refractive index n of the third negative power variable magnification lens 303 33 Satisfies: 1.65 < n 33 <2.05, the refractive index n of the fourth positive power variable magnification lens 304 34 Satisfies: 1.6 < n 34 <1.95, the refractive index n of the fifth negative power variable magnification lens 305 35 Satisfies: 1.65 < n 35 <2.05, the refractive index n of the sixth positive power variable magnification lens 306 36 Satisfies: 1.4 < n 36 <1.75.

[0075] By adjusting the refractive indices of each lens within the above ranges, it is possible to ensure that the refractive index of the optical system is large enough to reduce the overall optical length of the optical system, while also being beneficial to reducing the aberration of the optical system to ensure the imaging quality of the optical lens.

[0076] Furthermore, in this embodiment, an aperture stop is provided on the object-side surface of the fourth positive power variable magnification lens 304. The aperture stop is used to control the beam aperture and area entering the system. The aperture size of the aperture stop determines the aperture value of the system and the depth of field during shooting. Its aperture size can be fixed, or an aperture stop with an adjustable aperture can be placed as needed to achieve an adjustable light passing aperture, that is, for the purpose of having a variable system aperture value and changing the depth of field.

[0077] Next, an example will be given for the lens parameters provided in the embodiments of the present invention.

[0078] Example 1:

[0079] In this embodiment, the radius of curvature Radius, central thickness Thickness, refractive index N, and Abbe number V of each lens of the optical lens satisfy the conditions listed in Table 1:

[0080] Table 1

[0081]

[0082]

[0083] Among them, the aspherical parameters of the second negative focal length focusing lens, the negative focal length fixed lens, and the sixth positive focal length zoom lens satisfy the conditions listed in Table 2. Here, s1 is the surface on the side of the lens closer to the object side, and s2 is the surface on the side of the lens closer to the image side.

[0084] Table 2

[0085]

[0086]

[0087] The optical lens provided in Embodiment 1 has the following optical technical indicators:

[0088] Optical total length TTL ≤ 87 mm;

[0089] Image plane size: 1 / 1.8";

[0090] At the wide-angle end, the focal length f a1 = 2.9 mm, and the aperture F a1 = 0.73. At this time, the spherical aberration diagram of the optical lens in the visible light band is as shown in Figure 2 shown, and the astigmatism field curvature and distortion diagrams are as shown in Figure 3 shown;

[0091] At the mid-focal length end, the focal length f a2 = 9 mm, and the aperture F a2 = 1.1. At this time, the spherical aberration diagram of the optical lens in the visible light band is as shown in Figure 4 shown, and the astigmatism field curvature and distortion diagrams are as shown in Figure 5 shown;

[0092] At the long-focal length end, the focal length f a3 = 12 mm, and the aperture F a3 = 1.198. At this time, the spherical aberration diagram of the optical lens in the visible light band is as shown in Figure 6 shown, and the astigmatism field curvature and distortion diagrams are as shown in Figure 7 shown.

[0093] It can be seen that this embodiment provides an optical lens with a large aperture, a large image plane, an ultra-wide angle, a long zoom, a small volume, and good optical performance.

[0094] The present invention further provides a camera, which includes an optical lens. For the specific structure of the optical lens, please refer to the above embodiments. Since this camera adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0095] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens includes a negative focal length focusing lens group, a negative focal length fixed lens, and a positive focal length zoom lens group arranged in sequence from the object side to the image side. The negative focal length fixed lens is fixed relative to the optical axis of the optical lens. The negative focal length focusing lens group and the positive focal length zoom lens group can move along the optical axis of the optical lens so that the optical lens has a wide-angle end, a medium focal length end, and a long focal length end; The negative focal length focusing lens group includes a first negative focal length focusing lens, a second negative focal length focusing lens, a third negative focal length focusing lens, a fourth negative focal length focusing lens, a fifth negative focal length focusing lens, a sixth positive focal length focusing lens, and a seventh negative focal length focusing lens arranged in sequence from the object side to the image side; The positive focal length zoom lens group includes a first positive focal length zoom lens, a second positive focal length zoom lens, a third negative focal length zoom lens, a fourth positive focal length zoom lens, a fifth negative focal length zoom lens, and a sixth positive focal length zoom lens arranged in sequence from the object side to the image side; The focal length f1 of the negative focal length focusing lens group, the focal length f2 of the negative focal length fixed lens, and the focal length f3 of the positive focal length zoom lens group satisfy the following conditions: 0.5 < |f1 / f w | < 2, 10 < |f2 / f w | < 100, 0 < |f3 / f w | < 30; wherein, f w is the focal length of the optical lens at the wide-angle end; and 0 < |f1 / f2| < 0.1, 0 < |f1 / f3| < 0.5; The first negative focal length focusing lens, the second negative focal length focusing lens, the third negative focal length focusing lens, the fourth negative focal length focusing lens, and the sixth positive focal length focusing lens are all convex-concave lenses convex toward the object side, and the fifth negative focal length focusing lens and the seventh negative focal length focusing lens are both biconcave lenses; The negative focal length fixed lens is set as a meniscus lens convex toward the object side; The first positive focal length zoom lens, the second positive focal length zoom lens, the fourth positive focal length zoom lens, and the sixth positive focal length zoom lens are all biconvex lenses, and the third negative focal length zoom lens and the fifth negative focal length zoom lens are both biconcave lenses.

2. The optical lens according to claim 1, wherein The radius of curvature r of the surface of the third negative focusing lens closer to the image side 1R and the radius of curvature r of the surface closer to the object side 1L satisfy the following conditions: 0<(r 1R +r 1L ) / (r 1L -r 1R )<50； The radius of curvature r of the surface of the negative focal fixed lens closer to the image side 2R and the radius of curvature r of the surface closer to the object side 2L satisfy the following conditions: 0<(r 2R +r 2L ) / (r 2L -r 2R )<30； The radius of curvature r of the surface of the first positive optical variable magnification lens closer to the image side 3R and the radius of curvature r of the surface of the first positive optical variable magnification lens closer to the object side 3L satisfy the following conditions: -5<(r 3R +r 3L ) / (r 3L -r 3R )<0。 3. The optical lens according to claim 1, characterized in that The second negative focal length focusing lens, the negative focal length fixed lens, and the sixth positive focal length zoom lens are all aspherical lenses.

4. The optical lens according to claim 3, wherein The materials of the second negative focal length focusing lens and the sixth positive focal length zoom lens are glass materials, and the material of the negative focal length fixed lens is a plastic material.

5. The optical lens according to claim 1, characterized in that, The distance d1 between the first negative focal length focusing lens and the second negative focal length focusing lens satisfies: 1 mm < d1 < 5.5 mm; The distance d2 between the third negative focal length focusing lens and the fourth negative focal length focusing lens satisfies: 3 mm < d2 < 8 mm; The distance d3 between the first positive focal length zoom lens and the second positive focal length zoom lens satisfies: 0.1 mm < d3 < 0.8 mm.

6. The optical lens according to claim 1, characterized in that The focal length f of the first negative focal length focusing lens 11 satisfies: -80 mm < f 11 < -20 mm, and the focal length f of the second negative focal length focusing lens 12 satisfies: -50 mm < f 12 < -5 mm, and the focal length f of the third negative focal length focusing lens 13 satisfies: -55 mm < f 13 < -10 mm, and the focal length f of the fourth negative focal length focusing lens 14 satisfies: -1000 mm < f 14 < -50 mm, and the focal length f of the fifth negative focal length focusing lens 15 satisfies: -40 mm < f 15 < -10 mm, and the focal length f of the sixth positive focal length focusing lens 16 satisfies: 10 mm < f 16 < 45 mm, and the focal length f of the seventh negative focal length focusing lens 17 satisfies: -40 mm < f 17 < -15 mm; The focal length f2 of the negative focal length fixed lens satisfies: -200 mm < f2 < -50 mm; The focal length f of the first positive optical power variable magnification lens 31 satisfies: 5mm < f 31 < 40mm, and the focal length f of the second positive optical power variable magnification lens 32 satisfies: 15mm < f 32 < 80mm, and the focal length f of the third negative optical power variable magnification lens 33 satisfies: -60mm < f 33 < -15mm, and the focal length f of the fourth positive optical power variable magnification lens 34 satisfies: 3mm < f 34 < 25mm, and the focal length f of the fifth negative optical power variable magnification lens 35 satisfies: -30mm < f 35 < -9mm, and the focal length f of the sixth positive optical power variable magnification lens 36 satisfies: f 36 > 50mm.

7. The optical lens according to claim 1, characterized in that The refractive index n of the first negative focal length focusing lens 11 satisfies: 1.7 < n 11 < 1.95, and the refractive index n of the second negative focal length focusing lens 12 satisfies: 1.7 < n 12 < 1.95, and the refractive index n of the third negative focal length focusing lens 13 satisfies: 1.55 < n 13 < 1.8, and the refractive index n of the fourth negative focal length focusing lens 14 satisfies: 1.65 < n 14 < 1.88, and the refractive index n of the fifth negative focal length focusing lens 15 satisfies: 1.55 < n 15 < 1.8, and the refractive index n of the sixth positive focal length focusing lens 16 satisfies: 1.65 < n 16 < 1.88, and the refractive index n of the seventh negative focal length focusing lens 17 satisfies: 1.5 < n 17 < 1.7; The refractive index n2 of the negative focal length fixed lens satisfies: 1.45 < n2 < 1.75; Refractive index n of the first positive optical power variable-focus lens 31 Satisfies: 1.4 < n 31 < 1.65, refractive index n of the second positive optical power variable-focus lens 32 Satisfies: 1.45 < n 32 < 1.85, refractive index n of the third negative optical power variable-focus lens 33 Satisfies: 1.65 < n 33 < 2.05, refractive index n of the fourth positive optical power variable-focus lens 34 Satisfies: 1.6 < n 34 < 1.95, refractive index n of the fifth negative optical power variable-focus lens 35 Satisfies: 1.65 < n 35 < 2.05, refractive index n of the sixth positive optical power variable-focus lens 36 Satisfies: 1.4 < n 36 < 1.

75.

8. The optical lens according to any one of claims 1 to 7, characterized in that, An aperture stop is provided on the side of the fourth positive focal length zoom lens facing the object side.

9. A camera, characterized in that, An optical lens according to any one of claims 1 to 8.

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