CN101825761B - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN101825761B CN101825761B CN201010164632A CN201010164632A CN101825761B CN 101825761 B CN101825761 B CN 101825761B CN 201010164632 A CN201010164632 A CN 201010164632A CN 201010164632 A CN201010164632 A CN 201010164632A CN 101825761 B CN101825761 B CN 101825761B
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- China
- Prior art keywords
- lens
- mirror
- semielliptical
- angle
- wide
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Abstract
The invention aims to provide a wide-angle lens with simple structure and wider angle of vision. The wide-angle lens is sequentially provided with a hemi-ellipsoidal lens, a hemisphere lens, a field lens and an eye lens along an optical path from an object side, wherein the plane between the hemi-ellipsoidal lens and the hemisphere lens are in optical gluing. The wide-angle lens comprising the hemi-ellipsoidal lens, the hemisphere lens, the field lens and the eye lens are adopted in the invention, when the light beam passes through the hemi-ellipsoidal lens and the hemisphere lens, the included angle between a light beam and a main optical axis is reduced a lot and an image is formed on a focal plane of the field lens, thus an object in the direction of the 180-degree angle of vision can be seen by watching the focal plane of the field lens through the eye lens. The invention can be widely applied to the fields of daily life, meteorology, medical treatment, military, and the like.
Description
Technical field
The present invention relates to optical image technology, particularly relate 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.
Summary of the invention
Technical matters to be solved by this invention provides a kind of wide-angle lens simple in structure and that have bigger field angle.
The technical scheme that technical solution problem of the present invention 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 plane between said semielliptical mirror and the half-sphere mirror adopts optics glued.
The invention has the beneficial effects as follows: the present invention adopts the wide-angle lens that is made up 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, watches the focal plane of field lens through eyepiece, can see that field angle is the object on 180 ° the direction.The present invention 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 invention.
Fig. 2 is the synoptic diagram of another kind of structure of the present invention.
Embodiment
As depicted in figs. 1 and 2, wide-angle lens of the present invention 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 through minor axis on the semielliptical mirror 1 constitutes cement plane 5.Semielliptical mirror 1 radius of curvature R everywhere is a variable, and radius of curvature R is minimum on long axis direction, and radius of curvature R is 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 is 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.
Plane between semielliptical mirror 1 and the half-sphere mirror 2 adopts optics glued, 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 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 invention.
Principle of work of the present invention 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, and focal length is 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 through 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 (4)
1. wide-angle lens; It 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; Plane between said semielliptical mirror (1) and the half-sphere mirror (2) adopts optics glued, and the major axis of said semielliptical mirror (1) and the ratio of minor axis be less than 3/2 but greater than 4/3, and said semielliptical mirror (1) employing refractive index is less than 1.55 optical glass; The xsect that said semielliptical mirror (1) is gone up through minor axis constitutes cement plane (5); The center of circle at the xsect of gluing place semielliptical mirror (1) and half-sphere mirror (2) overlaps, and the diameter of said half-sphere mirror (2) is greater than 1/2 minor axis of semielliptical mirror (1), and said half-sphere mirror (2) adopts refractive index greater than 1.6 optical glass; Said semielliptical mirror (1) and half-sphere mirror (2) constitute object lens, said field lens (3) places the focal plane (6) of object lens to locate.
2. wide-angle lens as claimed in claim 1 is characterized in that: said field lens (3) adopts convex lens, biconvex lens or equivalent combinations mirror, and the diameter of said field lens (3) is equal to or greater than the length of the minor axis of semielliptical mirror (1).
3. wide-angle lens as claimed in claim 1 is characterized in that: said eyepiece (4) places a center, and the focal length of eyepiece (4) equals the show up distance at center of field lens (3).
4. wide-angle lens as claimed in claim 1 is characterized in that: said eyepiece (4) adopts convex lens, biconvex lens or equivalent combinations mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010164632A CN101825761B (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010164632A CN101825761B (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101825761A CN101825761A (en) | 2010-09-08 |
| CN101825761B true CN101825761B (en) | 2012-10-03 |
Family
ID=42689771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010164632A Expired - Fee Related CN101825761B (en) | 2010-05-06 | 2010-05-06 | Wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101825761B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017107615B3 (en) * | 2017-04-10 | 2018-03-08 | Jenoptik Advanced Systems Gmbh | Monocentric receiving arrangement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB542723A (en) * | 1938-08-12 | 1942-01-26 | Andre Garbarini | Improvements in multiple divergence reflex reflecting devices |
| US4905034A (en) * | 1986-03-25 | 1990-02-27 | Asahi Kogaku Kogyo Kabushiki Kaisha | Automatic focusing projector |
| CN201138388Y (en) * | 2007-11-24 | 2008-10-22 | 中山联合光电科技有限公司 | Minimized optical lens with ultra- wide angle and small distortion |
| CN201681198U (en) * | 2010-05-06 | 2010-12-22 | 马开运 | Wide-angle lens |
-
2010
- 2010-05-06 CN CN201010164632A patent/CN101825761B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB542723A (en) * | 1938-08-12 | 1942-01-26 | Andre Garbarini | Improvements in multiple divergence reflex reflecting devices |
| US4905034A (en) * | 1986-03-25 | 1990-02-27 | Asahi Kogaku Kogyo Kabushiki Kaisha | Automatic focusing projector |
| CN201138388Y (en) * | 2007-11-24 | 2008-10-22 | 中山联合光电科技有限公司 | Minimized optical lens with ultra- wide angle and small distortion |
| CN201681198U (en) * | 2010-05-06 | 2010-12-22 | 马开运 | Wide-angle lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101825761A (en) | 2010-09-08 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20190506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |