Optical head
US4754355A · kind A · utility
3Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Apr 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10532
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head for a magneto-optical disk, including a diaphragm for cutting at least an outer portion of a bundle of rays, which is provided in the course of an optical system of a signal detecting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.