Reproducing apparatus for an optical recording medium
US5008521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Mar 29, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reproducing apparatus reproduces an information signal from a card type optical recording medium from which an information signal can be optically read out and on which an information signal is discretely recorded as a plurality of blocks each consisting of a plurality of track trains. The apparatus comprises a detector formed with a plurality of detecting elements arranged two-dimensionally. A light beam from a reproducing light source irradiates the entire area of the block as a recording unit. The detector detects light reflected from the optical card, and a extractor extracts a detection output of one of the track trains in the block on the basis of a detection output from the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.