Optical information processor with prismatic correction of laser beam shape
US4333173A · kind A · utility
44Cited by
8References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1980 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | May 22, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1398
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information processor comprising a semiconductor laser device which has a rectangular light emitting region, a disk, and an optical system which includes a prism for converting a non-circular beam emergent from the laser device into a circular beam, the circular beam being projected onto the disk by the optical system thereby to record or play back predetermined information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.