Optical apparatus
US4322135A · kind A · utility
59Cited by
3References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1979 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Nov 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical apparatus for biocular viewing which is small and of light weight comprises a solid optical element having a face which internally reflects light from an image surface to internally concave reflecting areas which reflect the light back to the face to emerge as two beams travelling towards respective eye positions via a corrector lens. The apparatus can be used in night vision goggles having a single image intensifier tube providing the image surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.