Pick-up with adaptation
US5550800A · kind A · utility
6Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1995 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | May 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1263
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical recording apparatus light is directed to and reflected from a recording medium to recover recorded information. The intensity of direct and reflected light is measured and the ratio of the measured values is used to control the intensity of the light source to maintain the intensity of reflected light substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.