CN203365783U - Novel focal-reduction light-enhancing mount - Google Patents
Novel focal-reduction light-enhancing mount Download PDFInfo
- Publication number
- CN203365783U CN203365783U CN 201320485513 CN201320485513U CN203365783U CN 203365783 U CN203365783 U CN 203365783U CN 201320485513 CN201320485513 CN 201320485513 CN 201320485513 U CN201320485513 U CN 201320485513U CN 203365783 U CN203365783 U CN 203365783U
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- side optical
- optical surface
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Abstract
The utility model relates to a novel focal-reduction light-enhancing mount, which comprises a mount frame and a lens group. The object side optical surface of a first lens is a convex surface while the image side optical surface is a concave surface. The object side optical surface of a second lens is a slight convex surface while the image side optical surface is a concave surface. The object side optical surface of a third lens is a slight convex surface while the image side optical surface is a convex surface. The object side optical surface of a fourth lens is a concave surface while the image side optical surface is a slight convex surface. The shape of the fourth lens is rectangular, and the object side optical surface thereof and the image side optical surface of the third lens are consistent in curvature and are bonded together. By performing a focal length transition between an interchangeable lens digital camera and various kinds of mount lenses, the focal-reduction light-enhancing mount makes a lens image field reduced, viewing angle enlarged and light rays more concentrated. Therefore, a user is enabled to shoot images at a higher shutter speed or under lower photosensibility on the same aperture condition, so that an APS frame camera of the interchangeable lens digital camera can obtain viewing angle and focus similar to that of a full-frame camera when connecting a full-frame lens.
Description
Technical field
The utility model relates to a kind of novel Jiao of subtracting T-Ring that adds lustre to, and for the fuselage of digital camera or video camera, with various bayonet socket camera lenses, coordinates, and realizes better imaging effect.
Background technology
The cmos image sensor of current micro-one camera is all the APS-C picture, and namely greatly about 25mm * 17mm, and the cmos image sensor of silent frame camera is approximately 36mm * 24mm.This can't obtain the visual angle identical with the silent frame camera while just making micro-single switching silent frame camera lens.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of novel Jiao of subtracting T-Ring that adds lustre to, this subtracts Jiao and adds lustre to T-Ring by carry out a focal length conversion between micro-one camera and various bayonet socket camera lens, the camera lens image field is dwindled, visual angle is larger, light is more concentrated, thereby reach under same aperture, can use higher shutter speed or more low speed taken, make micro-single APS image camera obtain visual angle and the focal length close with the silent frame camera when switching silent frame camera lens.
For overcoming the above problems, concrete technical scheme of the present utility model is as follows: a kind of novel Jiao of subtracting T-Ring that adds lustre to, comprise T-Ring frame and mirror group, the mirror group by the thing side to be arranged in order first lens, the second lens, the 3rd lens and the 4th lens as side, wherein first lens thing side optical surface is convex surface, as the side optical surface, is concave surface; The second lens thing side optical surface is the dimpling face, as the side optical surface, is concave surface; The 3rd lens thing side optical surface is the dimpling face, as the side optical surface, is convex surface; The 4th lens thing side optical surface is concave surface, as the side optical surface, is the dimpling face; Wherein the profile of the 4th lens is rectangle, and the picture sidelight of its thing side optical surface and the 3rd lens is learned the consistent and gummed of the face curvature, and the picture side optical surface of the 4th lens to the cmos image sensor of camera apart from being 7mm-15mm.
The material of described first lens, the second lens, the 3rd lens and the 4th lens is glass.
This novel Jiao of subtracting adds lustre to after T-Ring adopts above-mentioned lens set structure, and micro-one camera of APS-C picture, using when originally subtracting Jiao and adding lustre to the full camera lens of T-Ring switching, keeps the field angle of former full width camera lens constant.Focal-length factor is substantially constant.It is basic identical that the cmos image sensor of the APS-C picture on camera is received like this information and silent frame camera structure arrives, also just on micro-one camera of price relative variability, obtain the shooting effect close to expensive silent frame camera, simultaneously because the camera lens image field dwindles, light is more concentrated, make under same aperture, can use higher shutter speed or lower light sensitivity to be taken.
The accompanying drawing explanation
Fig. 1 subtracts the add lustre to structural representation of T-Ring camera lens of Jiao.
Embodiment
As shown in Figure 1, a kind of novel Jiao of subtracting T-Ring camera lens that adds lustre to, comprise T-Ring frame and mirror group, the mirror group by the thing side to be arranged in order first lens 1, the second lens 2, the 3rd lens 3 and the 4th lens 4 as side, wherein first lens 1 thing side optical surface is convex surface, as the side optical surface, is concave surface; The second lens 2 thing side optical surfaces are the dimpling face, as the side optical surface, are concave surface; The 3rd lens 3 thing side optical surfaces are the dimpling face, as the side optical surface, are convex surface; The 4th lens 4 thing side optical surfaces are concave surface, as the side optical surface, are the dimpling face; Wherein the profile of the 4th lens 4 is rectangle, its thing side optical surface is learned the consistent also gummed of the face curvature with the picture sidelight of the 3rd lens 3, and the picture side optical surface of the 4th lens 4 is 7mm-15mm to the distance of the cmos image sensor of camera, and extend into camera inside.Be rectangle by the 4th lens face shaping, make eyeglass can press close to more easily the cmos image sensor of camera, reach better imaging effect.
The material of described first lens 1, the second lens 2, the 3rd lens 3 and the 4th lens 4 is glass.
Its image-forming principle is: at first this T-Ring is installed on micro-one camera, and then single anti-full camera lens is installed on this T-Ring.Now the light of full camera lens must be through originally subtracting Jiao's T-Ring that adds lustre to.Originally subtract Jiao add lustre to T-Ring will be whole light bunchings of full camera lens on micro-single APS-C sensor, thereby reached intimate whole visual angles of former full camera lens.Because optical density increases, illumination strengthens simultaneously, and f-number obviously promotes or light sensitivity reduces.
Claims (2)
1. novel Jiao of subtracting T-Ring that adds lustre to, comprise T-Ring frame and mirror group, it is characterized in that: the mirror group by the thing side to be arranged in order first lens (1), the second lens (2), the 3rd lens (3) and the 4th lens (4) as side, wherein first lens (1) thing side optical surface is convex surface, as the side optical surface, is concave surface; The second lens (2) thing side optical surface is the dimpling face, as the side optical surface, is concave surface; The 3rd lens (3) thing side optical surface is the dimpling face, as the side optical surface, is convex surface; The 4th lens (4) thing side optical surface is concave surface, as the side optical surface, is the dimpling face; Wherein the profile of the 4th lens (4) is rectangle, and the picture sidelight of its thing side optical surface and the 3rd lens (3) is learned the consistent and gummed of the face curvature, and the picture side optical surface of the 4th lens (4) to the cmos image sensor of camera apart from being 7mm-15mm.
2. novel Jiao of subtracting as claimed in claim 1 T-Ring that adds lustre to, it is characterized in that: the material of described first lens (1), the second lens (2), the 3rd lens (3) and the 4th lens (4) is glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320485513 CN203365783U (en) | 2013-08-09 | 2013-08-09 | Novel focal-reduction light-enhancing mount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320485513 CN203365783U (en) | 2013-08-09 | 2013-08-09 | Novel focal-reduction light-enhancing mount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203365783U true CN203365783U (en) | 2013-12-25 |
Family
ID=49813528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320485513 Expired - Fee Related CN203365783U (en) | 2013-08-09 | 2013-08-09 | Novel focal-reduction light-enhancing mount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203365783U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624741A (en) * | 2020-07-03 | 2020-09-04 | 深圳市爵影科技有限公司 | Focusing-reducing and light-increasing additional mirror |
| WO2022041269A1 (en) * | 2020-08-31 | 2022-03-03 | 深圳市大疆创新科技有限公司 | Optical system, photographic apparatus, and movable platform |
-
2013
- 2013-08-09 CN CN 201320485513 patent/CN203365783U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624741A (en) * | 2020-07-03 | 2020-09-04 | 深圳市爵影科技有限公司 | Focusing-reducing and light-increasing additional mirror |
| WO2022041269A1 (en) * | 2020-08-31 | 2022-03-03 | 深圳市大疆创新科技有限公司 | Optical system, photographic apparatus, and movable platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160809 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |