Reflection type image forming optical system having a large angle of view
US4037943A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0615
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reflection type image forming optical system having a large angle of view comprises a convex mirror for reflecting incident light and a concave mirror. The concave mirror is disposed with the reflecting surface thereof facing the reflecting surface of the convex mirror so that light reflected by the convex mirror at a large angle with respect to the normal thereof enters the concave mirror at a large angle and that light reflected by the convex mirror at a small angle with respect to the normal thereof enters the concave mirror at a small angle. The concave mirror is arranged so that the distance between the center of curvature of the convex mirror and that of the concave mirror is greater than half the radius of curvature of the concave mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.