Optical apparatus for optical information recording medium
US5043965A · kind A · utility
16Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/261
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical apparatus for an optical information recording medium including a light source, two acoustooptical elements for modulating the light beam emitted from the light source and an objective lens for focusing the light beam emitted from the acoustooptical elements to the optical information recording medium, the acoustooptical elements being provided in an optical path extending from the light source to the objective lens arranged such that directions of travel of supersonic waves generated in the respective acoustooptical elements are crossed to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.