Optical information reproducing apparatus
US5610897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Dec 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical information recording/reproducing apparatus, the reproduction of information is performed as following manner. A light spot is formed on a recording medium on which information is recorded so that a phase of light reflected by a small region as an information pit is different from a phase of light reflected by other regions. Upon scanning the recording medium with the light spot, a leading edge and a trailing edge of the information pit in the scanning direction are respectively detected. A detection signal for the leading edge of the information pit and a detection signal for the trailing edge of the information pit are synthesized to effect the reproduction of information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.