CN217279090U - Fish-eye lens assembly - Google Patents
Fish-eye lens assembly Download PDFInfo
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- CN217279090U CN217279090U CN202221176937.0U CN202221176937U CN217279090U CN 217279090 U CN217279090 U CN 217279090U CN 202221176937 U CN202221176937 U CN 202221176937U CN 217279090 U CN217279090 U CN 217279090U
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Abstract
The utility model discloses a fish-eye lens assembly, which comprises a lens main body and a lens group, wherein the outer wall of the lens main body is wrapped by a layer of rubber sleeve, the bottom end of the lens main body is provided with a tail end fixing frame, a waterproof piece is bonded in the bottom end shell of the tail end fixing frame, the front end of the lens main body is provided with a covering ring, the front end of the lens main body is fixedly connected with a first lens through the covering ring, and the inner side of the covering ring is also provided with the waterproof piece; the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are arranged in sequence from an object side to an image side along an optical axis. Compared with the prior art, the lens main body of the utility model adopts the integral design, and has good sealing performance; the shape of the waterproof piece is completely consistent with that of the lens main body, so that the waterproof piece is attached to the lens main body; the fisheye lens is sleeved with a rubber sleeve and a fixing piece, and the effects of shock resistance and falling resistance are achieved. The fisheye lens has the advantages of large angle, high resolution and no virtual focus.
Description
Technical Field
The utility model relates to an optical lens technical field, in particular to fisheye lens subassembly.
Background
A fisheye lens is a lens having a focal length of 16mm or less and a viewing angle close to or equal to 180 °. It is an extreme wide-angle lens, and the "fish-eye lens" is its common name. In order to maximize the photographing angle of view of the lens, the front lens of the photographing lens has a very short diameter and is parabolic and convex toward the front of the lens, which is very similar to the fish eye, so the name "fish eye lens" is given. The fisheye lens belongs to a special lens in an ultra-wide angle lens, and the visual angle of the fisheye lens is required to reach or exceed the range which can be seen by human eyes. Therefore, the fisheye lens is very different from the real world scene in human eyes, because the scene seen in real life is in a regular fixed form, and the picture effect generated by the fisheye lens is beyond the scope. For a photographing apparatus applied under water, it performs wide-angle photographing using a fisheye lens. The existing fisheye lens has no special waterproof structure, the waterproof effect is poor, and the underwater shooting picture quality is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is how to provide a fisheye lens subassembly that water-proof effects is good.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a fisheye lens assembly comprises a lens main body and a lens group arranged in the lens main body, wherein a layer of rubber sleeve wraps the outer wall of the lens main body, a tail end fixing frame is arranged at the bottom end of the lens main body, a waterproof piece is bonded in a bottom end shell of the tail end fixing frame, a covering and pressing cover ring is arranged at the front end of the lens main body, a first lens is fixedly connected to the front end of the lens main body through the covering and pressing cover ring, and the waterproof piece is also arranged on the inner side of the covering and pressing cover ring; the lens group includes a first lens having a negative power, a second lens having a negative power, a third lens having a negative power, a fourth lens having a positive power, a diaphragm, a fifth lens having a positive power, a sixth lens having a negative power, and a seventh lens having a positive power, which are arranged in order from an object side to an image side along an optical axis.
Further, the first lens is a meniscus lens with a convex surface facing an object, the second lens is a meniscus lens with a convex surface facing the object, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a biconvex lens, and the sixth lens is a biconcave lens; the seventh lens is a double-sided convex lens.
Further, the first lens is a spherical lens, the second lens is an aspherical lens, the third lens is an aspherical lens, the fourth lens is a spherical or aspherical lens, the fifth lens is a spherical or aspherical lens, and the sixth lens is an aspherical lens; the seventh lens is an aspheric lens.
Further, a distance D from the center of the optical axis of the image side surface of the fifth lens to the center of the optical axis of the object side surface of the sixth lens and a distance D from the center of the optical axis of the image side surface of the seventh lens to the image plane satisfy the following relationship: D/D is more than or equal to 0.01 and less than or equal to 0.06.
Furthermore, each perspective mirror is fixed in the lens main body through a fixing piece, and dense suckers are arranged on the waterproof piece and the upper surface of the fixing piece.
Furthermore, the bottom end of the tail end fixing frame is provided with a connecting thread; the end part of the waterproof piece in the tail end fixing frame is sleeved outside the tail end fixing frame in an interference manner.
Further, the waterproof piece on the inner side of the covering ring is matched with the inner wall of the lens main body.
Furthermore, the front and back curvature radii of the first lens are respectively 8.7mm and 3.2mm, and the refractive index is 1.79; the curvature radiuses of the front side and the rear side of the second lens are respectively 27.3mm and 1.5mm, and the refractive index is 1.56; the front and back curvature radii of the third lens are-6.4 mm and 2mm respectively, and the refractive index is 1.54; the front and back curvature radii of the fourth lens are respectively 2mm and-5.5 mm, and the refractive index is 1.78; the curvature radius of the rear two sides of the fifth lens is 7.7mm, and the refractive index of the fifth lens is 1.54; the front and back curvature radii of the sixth lens are respectively-1.4 mm and-1.1 mm, and the refractive index is 1.66; the curvature radiuses of the front side and the rear side of the seventh lens are 9.5mm and 2.2mm respectively, and the refractive index is 1.53.
Further, the abbe numbers of the first lens to the seventh lens are 48.2, 53.1, 55.7, 25.7, 57, 20.4 and 56.1 in this order.
Compared with the prior art, the lens main body of the utility model adopts the integral design, and the sealing performance is good; the shape of the waterproof piece is completely consistent with that of the lens main body, so that the waterproof piece is attached to the lens main body and cannot seep water under the compression of the covering ring; the fisheye lens overcoat has the rubber sleeve and all is equipped with the mounting between the inside perspective mirror, can effectually play shockproof anti-falling effect. The fisheye lens has the advantages of large angle, high resolution, day and night confocal property and no virtual focus.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a fisheye lens assembly of the present invention;
fig. 2 is a schematic view of a lens set structure of an embodiment of the fish-eye lens assembly of the present invention;
FIG. 3 is a FFT-MTF graph showing a lens group frequency of 200lp/mm according to an embodiment of the present invention;
fig. 4 is a Through-Focus-MTF diagram of a lens assembly frequency of 120lp/mm according to an embodiment of the present invention.
In the figure, 1, a lens body; 11. a tail end fixing frame; 12. connecting threads; 13. covering and pressing the cover ring; 14. a waterproof member; 21. a first lens; 22. a second lens; 23. a third lens; 24. a fourth lens; 25. a fifth lens; 26. a sixth lens; 27. A seventh lens; 28. and (6) a diaphragm.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the utility model provides a fisheye lens assembly, including lens main body 1 and the lens group that sets up in lens main body 1, lens main body 1 outer wall parcel one deck rubber sleeve, the bottom of lens main body 1 is equipped with tail end mount 11, the bottom shell of tail end mount 11 is internal to be bonded with waterproof 14, the front end of lens main body 1 is equipped with the cover ring 13 that covers, the front end of lens main body 1 is fixedly connected with first lens 21 through cover ring 13 that covers, cover ring 13 inboard also is equipped with waterproof 14; the lens group includes a first lens 21 having a negative power, a second lens 22 having a negative power, a third lens 23 having a negative power, a fourth lens 24 having a positive power, a diaphragm 28, a fifth lens 25 having a positive power, a sixth lens 26 having a negative power, and a seventh lens 27 having a positive power, which are arranged in this order from the object side to the image side along the optical axis.
The lens main body 1 of the utility model adopts the integral design, and has good sealing performance; the shape of the waterproof part is completely consistent with that of the lens main body 1, so that the waterproof part 14 is attached to the lens main body 1 and cannot seep water under the compression of the covering ring 13; the fisheye lens overcoat has the rubber sleeve and all is equipped with the mounting between the inside perspective mirror, can effectually play shockproof anti-falling effect. The fisheye lens has the advantages of large angle, high resolution, day and night confocal property and no virtual focus.
Referring to fig. 2, 3 and 4, in the present embodiment, the first lens element 21 is a meniscus lens element with a convex surface facing an object, the second lens element 22 is a meniscus lens element with a convex surface facing the object, the third lens element 23 is a biconcave lens element, the fourth lens element 24 is a biconvex lens element, the fifth lens element 25 is a biconvex lens element, and the sixth lens element 26 is a biconcave lens element; the seventh lens 27 is a biconvex lens.
In this embodiment, the first lens 21 is a spherical lens, the second lens 22 is an aspheric lens, the third lens 23 is an aspheric lens, the fourth lens 24 is a spherical or aspheric lens, the fifth lens 25 is a spherical or aspheric lens, and the sixth lens 26 is an aspheric lens; the seventh lens 27 is an aspherical lens. The distance D from the image side optical axis center of the fifth lens 25 to the object side optical axis center of the sixth lens 26 and the distance D from the image side optical axis center of the seventh lens 27 to the image plane satisfy the following relation: D/D is more than or equal to 0.01 and less than or equal to 0.06.
On the basis of the embodiment, furthermore, the perspective mirrors are fixed in the lens main body 1 through fixing pieces, dense suckers are arranged on the upper surfaces of the waterproof piece 14 and the fixing pieces, and the bottom end of the tail end fixing frame 11 is provided with a connecting thread 12; the end of the waterproof part 14 in the tail end fixing frame 11 is sleeved outside the tail end fixing frame 11 in an interference manner. The waterproof member 14 covering the inside of the cover ring 13 is fitted to the inner wall of the lens body 1.
In the technical scheme of the present invention, the front and back curvature radii of the first lens 21 are respectively 8.7mm and 3.2mm, and the refractive index is 1.79; the front and rear curvature radii of the second lens 22 are respectively 27.3mm and 1.5mm, and the refractive index is 1.56; the front and rear curvature radii of the third lens 23 are-6.4 mm and 2mm, respectively, and the refractive index is 1.54; the front and rear curvature radii of the fourth lens 24 are respectively 2mm and-5.5 mm, and the refractive index is 1.78; the rear two sides of the fifth lens 25 have a curvature radius of 7.7mm and a refractive index of 1.54; the front and rear curvature radii of the sixth lens 26 are-1.4 mm and-1.1 mm, respectively, and the refractive index is 1.66; the front and rear radii of curvature of the seventh lens 27 are 9.5mm and 2.2mm, respectively, and the refractive index is 1.53. Wherein, the abbe numbers of the first lens 21 to the seventh lens 27 are 48.2, 53.1, 55.7, 25.7, 57, 20.4 and 56.1 in sequence.
The utility model provides a fisheye camera lens is when using, need add corresponding mounting with overall structure when putting into between two liang of perspective glasses, be equipped with intensive sucking disc on this mounting, can adsorb corresponding perspective glasses, and be equipped with on the first lens 21 of 1 front end of camera lens main part and cover ring 13, waterproof 14 that is equipped with on the tail end mount 11 of the bottom of camera lens main part 1, can prevent that the junction of camera lens main part 1 from seeping water, and it has the rubber sleeve to prevent that camera lens main part 1 from damaging and inside perspective glasses breakage when dropping at 1 overcoat of camera lens main part.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (9)
1. A fisheye lens assembly, comprising: the waterproof lens comprises a lens body and a lens group arranged in the lens body, wherein a layer of rubber sleeve wraps the outer wall of the lens body, a tail end fixing frame is arranged at the bottom end of the lens body, a bottom end shell of the tail end fixing frame is internally bonded with the tail end shell, a covering ring is arranged at the front end of the lens body, a first lens is fixedly connected to the front end of the lens body through the covering ring, and a waterproof piece is also arranged on the inner side of the covering ring; the lens group includes a first lens having a negative power, a second lens having a negative power, a third lens having a negative power, a fourth lens having a positive power, a diaphragm, a fifth lens having a positive power, a sixth lens having a negative power, and a seventh lens having a positive power, which are arranged in order from an object side to an image side along an optical axis.
2. The fish-eye lens assembly of claim 1, wherein the first lens is a meniscus lens with a convex surface facing the object, the second lens is a meniscus lens with a convex surface facing the object, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a biconvex lens, and the sixth lens is a biconcave lens; the seventh lens is a double-sided convex lens.
3. The fish-eye lens assembly of claim 1, wherein the first lens is a spherical lens, the second lens is an aspherical lens, the third lens is an aspherical lens, the fourth lens is a spherical or aspherical lens, the fifth lens is a spherical or aspherical lens, and the sixth lens is an aspherical lens; the seventh lens is an aspheric lens.
4. The fish-eye lens assembly of claim 2, wherein: the distance D from the center of the optical axis of the image side surface of the fifth lens to the center of the optical axis of the object side surface of the sixth lens and the distance D from the center of the optical axis of the image side surface of the seventh lens to the image plane satisfy the following relation: D/D is more than or equal to 0.01 and less than or equal to 0.06.
5. The fisheye lens assembly of claim 1, wherein: the perspective mirrors are fixed in the lens main body through fixing pieces, and dense suckers are arranged on the waterproof pieces and the upper surfaces of the fixing pieces.
6. The fisheye lens assembly of claim 5 wherein: the bottom end of the tail end fixing frame is provided with a connecting thread; the end part of the waterproof piece in the tail end fixing frame is sleeved outside the tail end fixing frame in an interference manner.
7. The fish-eye lens assembly of claim 6, wherein: the waterproof piece on the inner side of the covering ring is matched with the inner wall of the lens main body.
8. The fish-eye lens assembly of any one of claims 1 to 7, wherein the front and rear sides of the first lens have radii of curvature of 8.7mm and 3.2mm, respectively, and a refractive index of 1.79; the front and back curvature radiuses of the second lens are respectively 27.3mm and 1.5mm, and the refractive index is 1.56; the front and back curvature radii of the third lens are-6.4 mm and 2mm respectively, and the refractive index is 1.54; the front and back curvature radii of the fourth lens are respectively 2mm and-5.5 mm, and the refractive index is 1.78; the curvature radius of the rear two sides of the fifth lens is 7.7mm, and the refractive index of the fifth lens is 1.54; the front and back curvature radii of the sixth lens are respectively-1.4 mm and-1.1 mm, and the refractive index is 1.66; the curvature radiuses of the front side and the rear side of the seventh lens are 9.5mm and 2.2mm respectively, and the refractive index is 1.53.
9. The fish-eye lens assembly of claim 8, wherein the abbe numbers of the first lens to the seventh lens are 48.2, 53.1, 55.7, 25.7, 57, 20.4 and 56.1 in this order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221176937.0U CN217279090U (en) | 2022-05-15 | 2022-05-15 | Fish-eye lens assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221176937.0U CN217279090U (en) | 2022-05-15 | 2022-05-15 | Fish-eye lens assembly |
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| CN217279090U true CN217279090U (en) | 2022-08-23 |
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| CN202221176937.0U Active CN217279090U (en) | 2022-05-15 | 2022-05-15 | Fish-eye lens assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117970612A (en) * | 2024-03-29 | 2024-05-03 | 协益电子（苏州）有限公司 | Looking-around lens, imaging device and driving tool with same |
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2022
- 2022-05-15 CN CN202221176937.0U patent/CN217279090U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117970612A (en) * | 2024-03-29 | 2024-05-03 | 协益电子（苏州）有限公司 | Looking-around lens, imaging device and driving tool with same |
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