Light retro-reflecting responser and data modulator arrangement
US4134008A · kind A · utility
35Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1978 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jan 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/213
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light retro-reflective responser and data modulator arrangement which, in particular, allows expected incident radiation to be reflected back with no contour field within the operating field and which enables an optical modulator of very small size to be used. It comprises a retro-reflective system formed by an optical objective and in the corresponding focal zone, a lens, an electronically controlled optical modulator, and a reflective mirror, the two latter items being produced as layers deposited on at least one face of the lens and preferably on the plane face of a plano-convex lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.