Zero-distortion lens device for video conference or 3D biological recognition

Abstract

The utility model relates to the technical field of optical lenses, in particular to a zero-distortion lens device for video conferences or 3D (three-dimensional) biological recognition. Comprising a mounting sleeve, the left side of the mounting sleeve is an incident end, and the right side of the mounting sleeve is an emergent end; the fixing sleeve and the filter lens are installed at the two ends of the installation sleeve, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are installed on the installation sleeve and located between the fixing sleeve and the filter lens. The lens device has the characteristics of high resolution, large aperture, high resolving power and the like. Meanwhile, the problems of large distortion and poor imaging quality in the prior art are solved; the lens device can reduce the distortion of the lens to be less than 1%. The number of lens groups is reduced, the weight is lighter, and the size is smaller; the structure is simplified, and the cost is lower; moreover, the structural strength of the lens is improved through the support.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and particularly relates to a zero-distortion lens device for video conferencing or 3D biometric recognition. Background Art

[0002] Patent No. CN115128775A discloses a 4k high-definition, low-distortion and non-deformation video conferencing lens, belonging to the technical field of lenses. Among them: it includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence along the optical axis from the object plane to the image plane; the first lens, the fourth lens, and the eighth lens are all glass spherical lenses, and the second lens, the third lens, the fifth lens, the sixth lens, and the seventh lens are all plastic aspherical lenses; the focal lengths of the eight lenses are negative, negative, negative, positive, positive, negative, positive, and positive in sequence. The 4k high-definition, low-distortion and non-deformation video conferencing lens of the present invention has a resolution of more than 8 million pixels, a horizontal field of view angle greater than 120°, and a distortion within 10%, meeting the good usage requirements of video conferencing.

[0003] For the above-mentioned lens, the distortion is only within 10%, the imaging quality is insufficient, the number of lenses is large, the assembly is labor-intensive and material-consuming, it is not convenient enough, and the structure is easily damaged. Summary of the Utility Model

[0004] The utility model provides a zero-distortion lens device for video conferencing or 3D biometric recognition, which is used to solve the technical problems of large lens distortion, high cost, insufficient structural strength, and lack of convenience in the prior art.

[0005] In order to achieve the above purpose, the utility model is realized through the following technical solutions:

[0006] The present application provides a zero-distortion lens device for video conferencing or 3D biometric recognition, including an incident end, an exit end, and further including a mounting sleeve located on the connection line between the incident end and the exit end and provided on the mounting sleeve,

[0007] A fixed sleeve, located on the side close to the incident end;

[0008] A first lens, located on the side of the fixed sleeve away from the incident end;

[0009] A second lens, located on the side of the first lens away from the fixed sleeve;

[0010] A third lens, located on the side of the second lens away from the first lens;

[0011] A filter, located on the side close to the exit end;

[0012] A fourth lens, located on the side of the filter away from the exit end;

[0013] The fifth lens is located on the side of the fourth lens closer to the filter.

[0014] The sixth lens is located between the fifth lens and the filter.

[0015] Among them, the fifth lens is a concave-concave lens. The side of the fourth lens closer to the fifth lens is embedded in one side surface of the fifth lens, and the side of the sixth lens closer to the fifth lens is embedded in the other side surface of the fifth lens.

[0016] A zero-distortion lens device for video conferencing or 3D biometric recognition according to the present utility model can solve the problems of large distortion and poor imaging quality in the prior art. Moreover, the lens distortion is reduced to less than 1%, the number of lens groups of the lens is reduced, the structure is simplified, and the structural strength of the lens is improved.

[0017] In some embodiments, the first lens is a convex-concave lens, including a first convex portion and a first concave portion distributed in the direction from the incident end to the exit end.

[0018] Thus, the first lens is composed of the above structure.

[0019] In some embodiments, the second lens is a convex-concave lens, including a second convex portion and a second concave portion distributed in the direction from the incident end to the exit end.

[0020] Thus, the second lens is composed of the above structure.

[0021] In some embodiments, the third lens is a convex-concave lens, including a third convex portion and a third concave portion distributed in the direction from the incident end to the exit end.

[0022] Thus, the third lens is composed of the above structure.

[0023] In some embodiments, a zero-distortion lens device for video conferencing or 3D biometric recognition further includes a first bracket. The first bracket is disposed in the mounting sleeve and located between the second lens and the third lens.

[0024] Thus, the lens device is provided with a first bracket, and the relative relationship between the second lens and the third lens is adjusted through the first bracket.

[0025] In some embodiments, the fourth lens is a convex-convex lens, including a fourth convex portion and a fifth convex portion distributed in the direction from the incident end to the exit end.

[0026] Thus, the fourth lens is composed of the above structure.

[0027] In some embodiments, a zero-distortion lens device for video conferencing or 3D biometric recognition further includes a second bracket. The second bracket is disposed in the mounting sleeve and located between the third lens and the fourth lens.

[0028] The fourth convex portion of the fourth lens near the third lens is embedded in the second bracket.

[0029] Thus, the lens device is provided with a second bracket, and the relative relationship between the third lens and the fourth lens is adjusted through the second bracket.

[0030] In some embodiments, a zero-distortion lens device for video conferencing or 3D biometric recognition further includes a third bracket, and the fourth lens is mounted in the mounting sleeve through the third bracket.

[0031] Thus, the lens device is provided with a third bracket, and the third lens is mounted through the third bracket.

[0032] In some embodiments, the fifth lens includes a fourth concave portion and a fifth concave portion distributed in the direction from the incident end to the exit end;

[0033] The side surface of the fourth lens near the fifth lens is embedded in the fourth concave portion, and the side surface of the sixth lens near the fifth lens is embedded in the fifth concave portion.

[0034] Thus, the fifth lens is composed of the above structure.

[0035] In some embodiments, the sixth lens is a convex-convex lens, and includes a sixth convex portion and a seventh convex portion distributed in the direction from the incident end to the exit end;

[0036] The sixth convex portion on the side surface of the sixth lens near the fifth lens is embedded in the adjacent side surface of the fifth lens.

[0037] Thus, the sixth lens is composed of the above structure.

[0038] The specific embodiment of the beneficial effect of the present utility model is as follows: The lens device has characteristics such as high resolution, large aperture, and high resolving power. At the same time, the lens device can reduce the lens distortion to less than 1%, reduce the number of lens groups of the lens, and it is lighter in weight and smaller in volume; the structure is simplified and the cost is lower; moreover, the structural strength of the lens is improved through the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1Schematic three - dimensional structure diagram of a zero - distortion lens device provided by an embodiment of the present utility model for video conferencing or 3D biometric identification.

[0041] Figure 2 For Figure 1 Schematic plan structure diagram of a zero - distortion lens device for video conferencing or 3D biometric identification as shown.

[0042] Figure 3 For Figure 1 Schematic three - dimensional structure diagram of the exploded state of the lens group of a zero - distortion lens device for video conferencing or 3D biometric identification as shown.

[0043] Figure 4 For Figure 3 Schematic three - dimensional structure diagram of another perspective of the exploded state of the lens group as shown.

[0044] Figure 5 For Figure 1 Schematic cross - sectional structure diagram of a zero - distortion lens device for video conferencing or 3D biometric identification as shown

[0045] Reference numerals in the figure: 000 - mounting sleeve, 100 - first lens, 101 - first convex part, 102 - first concave part, 200 - second lens, 201 - second convex part, 202 - second concave part, 300 - third lens, 301 - third convex part, 302 - third concave part, 400 - fourth lens, 401 - fourth convex part, 402 - fifth convex part, 500 - fifth lens, 501 - fourth concave part, 502 - fifth concave part, 600 - sixth lens, 601 - sixth convex part, 602 - seventh convex part, 700 - fixed sleeve, 800 - filter, 910 - first bracket, 920 - second bracket, 930 - third bracket. Detailed implementation manners

[0046] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be welding, bolt connection, or riveting; it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Figures 1-5 Disclosed is a zero-distortion lens device for video conferencing or 3D biometric identification, which is used to solve the technical problems in the prior art such as large volume, small target surface, high cost, and non-day-and-night sharing. A zero-distortion lens device for video conferencing or 3D biometric identification includes a mounting sleeve 000, a fixed sleeve 700, a first lens 100, a second lens 200, a third lens 300, a fourth lens 400, a fifth lens 500, a sixth lens 600, and a filter 800. The incident end is located on the left side of the mounting sleeve 000, and the exit end is located on the right side of the mounting sleeve 000; the fixed sleeve 700, the first lens 100, the second lens 200, the third lens 300, the fourth lens 400, the fifth lens 500, the sixth lens 600, and the filter 800 are all arranged on the mounting sleeve 000.

[0051] Combined with Figures 3-5 ..., the fixed sleeve 700 is located on the side close to the incident end, and the filter 800 is located on the side close to the exit end; the first lens 100, the second lens 200, the third lens 300, the fourth lens 400, the fifth lens 500, and the sixth lens 600 are located between the fixed sleeve 700 and the filter 800; the first lens 100, the second lens 200, the third lens 300, the fourth lens 400, the fifth lens 500, and the sixth lens 600 are linearly arrayed in the direction from the incident end to the exit end.

[0052] Combined with Figures 3-5 ..., the first lens 100 is a convex-concave lens, including a first convex portion 101 and a first concave portion 102 distributed in the direction from the incident end to the exit end. The first lens 100 is composed of the above structure.

[0053] Combined with Figures 3-5, the second lens 200 is a convex-concave lens, including a second convex portion 201 and a second concave portion 202 distributed in the direction from the incident end to the exit end. The second lens 200 is composed of the above structure.

[0054] Combined Figures 3-5 , the third lens 300 is a convex-concave lens, including a third convex portion 301 and a third concave portion 302 distributed in the direction from the incident end to the exit end. The third lens 300 is composed of the above structure.

[0055] Combined Figures 3-5 , a zero-distortion lens device for video conferencing or 3D biometric identification further includes a first bracket 910. The first bracket 910 is provided in the mounting sleeve 000 and is located between the second lens 200 and the third lens 300. The lens device is provided with the first bracket 910, and the relative relationship between the second lens 200 and the third lens 300 is adjusted through the first bracket 910.

[0056] Combined Figures 3-5 , the fourth lens 400 is a convex-convex lens, including a fourth convex portion 401 and a fifth convex portion 402 distributed in the direction from the incident end to the exit end. The fourth lens 400 is composed of the above structure.

[0057] Combined Figures 3-5 , a zero-distortion lens device for video conferencing or 3D biometric identification further includes a second bracket 920. The second bracket 920 is provided in the mounting sleeve 000 and is located between the third lens 300 and the fourth lens 400; the fourth convex portion 401 of the fourth lens 400 close to the third lens 300 is embedded in the second bracket 920. The lens device is provided with the second bracket 920, and the relative relationship between the third lens 300 and the fourth lens 400 is adjusted through the second bracket 920.

[0058] Combined Figures 3-5 , a zero-distortion lens device for video conferencing or 3D biometric identification further includes a third bracket 930. The fourth lens 400 is installed in the mounting sleeve 000 through the third bracket 930. The lens device is provided with the third bracket 930, and the third lens 300 is installed through the third bracket 930.

[0059] Combined Figures 3-5 , the fifth lens 500 includes a fourth concave portion 501 and a fifth concave portion 502 distributed in the direction from the incident end to the exit end; the side surface of the fourth lens 400 close to the fifth lens 500 is embedded in the fourth concave portion 501, and the side surface of the sixth lens 600 close to the fifth lens 500 is embedded in the fifth concave portion 502. The fifth lens 500 is composed of the above structure.

[0060] Combined Figures 3-5, the sixth lens 600 is a convex-convex lens, including a sixth convex portion 601 and a seventh convex portion 602 distributed in the direction from the incident end to the exit end; the sixth convex portion 601 on the side of the sixth lens 600 close to the adjacent side of the fifth lens 500 is embedded in the adjacent side of the fifth lens 500. The sixth lens 600 is composed of the above structure.

[0061] In this embodiment, the first lens 100 and the fourth lens 400 are glass lenses. The second lens 200, the third lens 300, the fifth lens 500, and the sixth lens 600 are all plastic lenses.

[0062] Combined Figure 5 , the axis lines of the first lens 100, the second lens 200, the third lens 300, the fourth lens 400, the fifth lens 500, the sixth lens 600, and the filter 800 are located on the connection line between the incident end and the exit end, and the center points of the convex / concave portions of the first lens 100, the second lens 200, the third lens 300, the fourth lens 400, the fifth lens 500, the sixth lens 600, and the filter 800 are all on this axis line.

[0063] Combined Figure 5 , in this embodiment, the fixing sleeve 700 is installed on the mounting sleeve 000 with a total length m1 = 11.147 ± 0.20 mm; the distance m2 between the center point of the first lens 100 near the incident end and the center point of the mounting sleeve 000 near the exit end is 10.982 mm; the distance m3 between the center point of the second lens 200 near the incident end and the center point of the mounting sleeve 000 near the exit end is 9.942 mm; the distance m4 between the center point of the third lens 300 near the incident end and the center point of the mounting sleeve 000 near the exit end is 7.932 mm; the distance m5 between the center point of the first bracket 910 near the incident end and the center point of the mounting sleeve 000 near the exit end is 7.485 mm; the distance m6 between the center point of the second bracket 920 near the incident end and the center point of the mounting sleeve 000 near the exit end is 6.119 mm; the distance m7 between the center point of the fourth lens 400 near the incident end and the center point of the mounting sleeve 000 near the exit end is 4.657 mm; the thickness m8 of the fourth lens 400 is 1.305 mm; the distance m9 between the center point of the third bracket 930 near the exit end and the center point of the mounting sleeve 000 near the exit end is 3.352; the distance m10 between the side of the fifth lens 500 near the exit end and the center point of the mounting sleeve 000 near the exit end is 2.064 mm; the diameter o1 of the fixing sleeve 700 in the state of being installed on the mounting sleeve 000 near the incident end is 14.00 mm.

[0064] This lens device has characteristics such as high resolution, large aperture, and high resolution. At the same time, this lens device can reduce lens distortion to within 1%, reduce the number of lens groups in the lens, is lighter in weight and smaller in size; simplifies the structure and has a lower cost; moreover, the lens structure strength is improved through the bracket.

[0065] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope recorded in the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A zero-distortion lens device for video conferencing or 3D biometric recognition, comprising an incident end and an exit end, characterized in that, It further includes a mounting sleeve (000) located on the connection line between the incident end and the exit end, and provided on the mounting sleeve (000), a fixed sleeve (700) on the side closer to the incident end; a first lens (100) on the side of the fixed sleeve (700) away from the incident end; a second lens (200) on the side of the first lens (100) away from the fixed sleeve (700); a third lens (300) on the side of the second lens (200) away from the first lens (100); a filter (800) on the side closer to the exit end; a fourth lens (400) on the side of the filter (800) away from the exit end; a fifth lens (500) on the side of the fourth lens (400) closer to the filter (800); a sixth lens (600) between the fifth lens (500) and the filter (800), wherein, the fifth lens (500) is a concave-concave lens, the side of the fourth lens (400) closer to the fifth lens (500) is embedded in one side surface of the fifth lens (500), and the side of the sixth lens (600) closer to the fifth lens (500) is embedded in the other side surface of the fifth lens (500).

2. The zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 1, wherein, The first lens (100) is a convex-concave lens, including a first convex portion (101) and a first concave portion (102) distributed in the direction from the incident end to the exit end.

3. The zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 1, characterized in that, The second lens (200) is a convex-concave lens, including a second convex portion (201) and a second concave portion (202) distributed in the direction from the incident end to the exit end.

4. A zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 1, characterized in that, The third lens (300) is a convex-concave lens, including a third convex portion (301) and a third concave portion (302) distributed in the direction from the incident end to the exit end.

5. The zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 4, wherein, It further includes a first bracket (910), and the first bracket (910) is provided on the mounting sleeve (000) and located between the second lens (200) and the third lens (300); The third convex portion (301) on the side of the third lens (300) closer to the second lens (200) is embedded in the first bracket (910).

6. The zero-distortion lens device for video conferencing or 3D biometric identification according to claim 1, characterized in that, The fourth lens (400) is a convex-convex lens, including a fourth convex portion (401) and a fifth convex portion (402) distributed in the direction from the incident end to the exit end.

7. The zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 6, characterized in that, It further includes a second bracket (920), and the second bracket (920) is provided on the mounting sleeve (000) and located between the third lens (300) and the fourth lens (400); The fourth convex portion (401) on the fourth lens (400) closer to the third lens (300) is embedded in the second bracket (920).

8. A zero-distortion lens device for video conferencing or 3D biometric recognition according to claim 6, characterized in that, It further includes a third bracket (930), and the fourth lens (400) is installed in the mounting sleeve (000) through a part of the third bracket (930), and the other part of the third bracket (930) abuts against the fifth lens (500).

9. A zero-distortion lens device for video conferencing or 3D biometric recognition according to any one of claims 1-8, characterized in that, The fifth lens (500) includes a fourth concave portion (501) and a fifth concave portion (502) distributed in the direction from the incident end to the exit end; The side of the fourth lens (400) close to the fifth lens (500) is embedded in the fourth concave portion (501), and the side of the sixth lens (600) close to the fifth lens (500) is embedded in the fifth concave portion (502).

10. A zero-distortion lens device for video conferencing or 3D biometric recognition according to any one of claims 1-8, characterized in that, The sixth lens (600) is a convex-convex lens, including a sixth convex portion (601) and a seventh convex portion (602) distributed in the direction from the incident end to the exit end. The sixth convex portion (601) on the side of the sixth lens (600) close to the fifth lens (500) is embedded in the adjacent side of the fifth lens (500).

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