Achromatic hologram optical system
US5477348A · kind A · utility
14Cited by
20References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Feb 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/21
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An achromatic hologram optical system for converting a wave front A into a wave front B. Two holograms (H.sub.1 and H.sub.2) are provided. The length of an optical path from an equiphase front of the wave front A to an equiphase front of the wave front B is constant, and each of the two holograms has a curved surface shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.