Optical objectives
US4266849A · kind A · utility
5Cited by
7References
1Claims
0Family size
Inventor
Key dates
| Filing date | Mar 16, 1977 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Mar 16, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention is a new telescopic optical system that comprises a concave primary reflector and a retro-directive reflector for reflecting light from the primary reflector and forming an erect real image at a plane within the system. In the preferred embodiment the retro-directive reflector is a corner reflector and no intermediate inverted image is found.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.