Phase retardation element and prism for use in an optical data storage system
US4595261A · kind A · utility
5Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1983 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Oct 13, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A phase retardation element, for use in an optical data storage system, which provides a 90.degree. phase difference between two perpendicular polarized components of an incident wave with a single internal reflection from a surface coated with a thin film of dielectric or metal material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.