CN201681198U - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN201681198U CN201681198U CN2010201814983U CN201020181498U CN201681198U CN 201681198 U CN201681198 U CN 201681198U CN 2010201814983 U CN2010201814983 U CN 2010201814983U CN 201020181498 U CN201020181498 U CN 201020181498U CN 201681198 U CN201681198 U CN 201681198U
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- CN
- China
- Prior art keywords
- lens
- mirror
- wide
- semielliptical
- angle
- Prior art date
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- Expired - Fee Related
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Abstract
The technology problem to solve in the utility model is to provide a wide-angle lens provided with a simple structure and a larger angle of visual field. The wide-angle lens comprising, from the side of the object and along the optical path, a semi-ellipsoid lens, a hemisphere lens, a field lens and an ocular lens, the plains between the hemi-ellipsoid lens and the hemisphere lens are in an optical glue. The wide-angle lens in the utility model is composed by the hemi-ellipsoid lens, the hemisphere lens, the field lens and the ocular lens, after the light beam goes through the hemi-ellipsoid lens and the hemisphere lens, the included angle of the light beam and the principal optical axis is greatly minimized, and the imaging is on the focal plane of the field lens, seeing the focal plane of the field lens via the ocular lens, the object with the angle of visual field to the 180 degree direction can be seen. The wide-angle lens can be widely applied to fields such as daily life. meteorology, medical treatment, military, etc.
Description
Technical field
The utility model relates to optical image technology, particularly relates to a kind of wide-angle lens.
Background technology
Therefore wide-angle lens is widely used in aspects such as daily life, medical treatment and military affairs because of producing very unique visual effect, holding broader scene.200810215996.2 a kind of wide-angle lens is disclosed, simple in structure and have and surpass 90 ° of field angle that are lower than 120 °, but for some special dimensions, its field angle still is not enough.
The utility model content
Technical problem to be solved in the utility model provides a kind of wide-angle lens simple in structure and that have bigger field angle.
The technical scheme that the utility model technical solution problem is adopted is: wide-angle lens, be followed successively by semielliptical mirror, half-sphere mirror, field lens and eyepiece from object side along light path, and the optics gluing is adopted on the plane between described semielliptical mirror and the half-sphere mirror.
The beneficial effects of the utility model are: the utility model adopts the wide-angle lens that is made of semielliptical mirror, half-sphere mirror, field lens and eyepiece, after light beam passes through semielliptical mirror and half-sphere mirror, the angle of light beam and primary optical axis reduces a lot, and imaging is on the focal plane of field lens, watch the focal plane of field lens by eyepiece, can see that field angle is the object on 180 ° the direction.The utility model can be widely used in fields such as daily life, meteorology, medical treatment and military affairs.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the synoptic diagram of another kind of structure of the present utility model.
Embodiment
As depicted in figs. 1 and 2, wide-angle lens of the present utility model is followed successively by semielliptical mirror 1, half-sphere mirror 2, field lens 3 and eyepiece 4 from object side along light path.Semielliptical mirror 1 adopts refractive index less than 1.55 optical glass, and the surface optics polishing adopts the semielliptical mirror 1 of little refractive index just can make the focal length long enough, and the focal plane could be outside half-sphere mirror 2.Xsect by minor axis on the semielliptical mirror 1 constitutes cement plane 5.Semielliptical mirror 1 radius of curvature R everywhere is a variable, radius of curvature R minimum on long axis direction, radius of curvature R maximum on short-axis direction.The ratio of the major axis of semielliptical mirror 1 and minor axis is less than 3/2 but greater than 4/3, and the focal length of major axis is the shortest like this, and it is elongated to increase focal length with field angle, focal length maximum during 180 ° of field angle, light beam is after the refraction of the hemisphere face of cement plane 5, half-sphere mirror 2, and all focuses could be on a plane, i.e. the focal plane.
The optics gluing is adopted on plane between semielliptical mirror 1 and the half-sphere mirror 2, promptly adopts optical texture glue directly glued between semielliptical mirror 1 and the half-sphere mirror 2, and the center of circle of the xsect of glued place's semielliptical mirror 1 and half-sphere mirror 2 overlaps.The diameter of half-sphere mirror 2 can guarantee to collect all light beams like this greater than 1/2 minor axis of semielliptical mirror 1.Half-sphere mirror 2 adopts refractive indexes greater than 1.6 optical glass, the surface optics polishing, and the half-sphere mirror 2 of big refractive index just can make light beam produce enough big deflection in the hemisphere face refraction of cement plane 5, half-sphere mirror 2, thereby makes 180 ° beam convergence on focal plane 6.Semielliptical mirror 1 and half-sphere mirror 2 constitute object lens of the present utility model.
Principle of work of the present utility model is: light beam is earlier after the hemisphere face of the ellipsoid of semielliptical mirror 1, cement plane 5, half-sphere mirror 2 refraction post-concentration in a bit, is called focus.Field angle is that the set of the focus of the beam convergence that sends on 180 ° the direction constitutes focal plane 6.Incident light reflects at cement plane 5, and the angle of refraction back light beam reduces a lot, and light beam reflects behind the hemisphere face of half-sphere mirror 2 again, and the angle of light beam further reduces.The focal length of primary optical axis is the shortest, and light beam increases focal length with field angle and increases focal length maximum during 180 ° of field angle.Light beam all focuses after the hemisphere face refraction of cement plane 5, half-sphere mirror 2 collect on the focal plane.Field lens 3 changes the light beam direct of travel, makes all beam convergences in the center, field.Field lens 3 changes field angle, and does not influence the focus of imaging light beam.Field lens 3 also arrives object lens one side with eyepiece 4 pupil imaging, and scribing goes out small size on ellipsoid, and promptly incident end pupil is controlled incident beam.Eyepiece 4 is made magnifier and is used, and the pupil control imaging light beam of eyepiece 4 is watched the focal plane 6 of field lens 3 by eyepiece 4, can see that field angle is the object on 180 ° the direction, thereby realizes observing the purpose of object of 180 ° field angle.
Claims (10)
1. wide-angle lens is characterized in that: be followed successively by semielliptical mirror (1), half-sphere mirror (2), field lens (3) and eyepiece (4) from object side along light path, the plane employing optics gluing between described semielliptical mirror (1) and the half-sphere mirror (2).
2. wide-angle lens as claimed in claim 1 is characterized in that: the major axis of described semielliptical mirror (1) and the ratio of minor axis are less than 3/2 but greater than 4/3.
3. wide-angle lens as claimed in claim 1 is characterized in that: described semielliptical mirror (1) adopts refractive index less than 1.55 optical glass.
4. wide-angle lens as claimed in claim 1 is characterized in that: the xsect that described semielliptical mirror (1) is gone up by minor axis constitutes cement plane (5), in the center of circle coincidence of the xsect of gluing place semielliptical mirror (1) and half-sphere mirror (2).
5. wide-angle lens as claimed in claim 1 is characterized in that: the diameter of described half-sphere mirror (2) is greater than 1/2 minor axis of semielliptical mirror (1).
6. wide-angle lens as claimed in claim 1 is characterized in that: described half-sphere mirror (2) adopts refractive index greater than 1.6 optical glass.
7. wide-angle lens as claimed in claim 1 is characterized in that: described semielliptical mirror (1) and half-sphere mirror (2) constitute object lens, described field lens (3) places the focal plane (6) of object lens to locate.
8. wide-angle lens as claimed in claim 1 is characterized in that: described field lens (3) adopts convex lens, biconvex lens or equivalent combinations mirror, and the diameter of described field lens (3) is equal to or greater than the length of the minor axis of semielliptical mirror (1).
9. wide-angle lens as claimed in claim 1 is characterized in that: described eyepiece (4) places a center, and the focal length of eyepiece (4) equals the show up distance at center of field lens (3).
10. wide-angle lens as claimed in claim 1 is characterized in that: described eyepiece (4) adopts convex lens, biconvex lens or equivalent combinations mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201814983U CN201681198U (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201814983U CN201681198U (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681198U true CN201681198U (en) | 2010-12-22 |
Family
ID=43346238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201814983U Expired - Fee Related CN201681198U (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681198U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825761A (en) * | 2010-05-06 | 2010-09-08 | 马开运 | Wide-angle lens |
| CN109664035A (en) * | 2017-10-11 | 2019-04-23 | 无锡映型三维数字技术有限公司 | A kind of three-dimensional modeling machine that laser damage structure is cut and its application method |
-
2010
- 2010-05-06 CN CN2010201814983U patent/CN201681198U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825761A (en) * | 2010-05-06 | 2010-09-08 | 马开运 | Wide-angle lens |
| CN101825761B (en) * | 2010-05-06 | 2012-10-03 | 马开运 | Wide-angle lens |
| CN109664035A (en) * | 2017-10-11 | 2019-04-23 | 无锡映型三维数字技术有限公司 | A kind of three-dimensional modeling machine that laser damage structure is cut and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20130506 |