Recording assembly for volume holography
US4017144A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1976 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/54
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A solid cylindrical recording medium is axially rotatable within a cavity in a transparent block, the medium and the cavity being complementary in shape. The medium and the block have substantially equal indexes of refraction whereby the medium does not refract light transmitted thereto through the block. Transmitted to the medium (through the block) is an object beam, representative of an image, and a reference beam, whereby the medium is exposed and a volume hologram of the image is recorded. A multiplicity of volume holograms of images may be recorded by rotating the medium with respect to the reference beam after each of a multiplicity of exposures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.