Apparatus for optically reconstructing information
US4051528A · kind A · utility
14Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Feb 26, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/909
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Optical information reconstructing apparatus comprising a disc having at least one surface on which groups of dots bearing information are concentrically or spirally arrayed, a mechanism for rotating the disc, a light source for projecting a light beam on the array of groups of dots, and at least one photodetector for detecting diffracted light waves from the groups of dots, characterized in that a semiconductor laser array is used as the light source and that the light emission is switched from one laser source to another in the laser array in tracking the information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.