Optical pickup apparatus
US4907858A · kind A · utility
14Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical pickup apparatus comprising a light source for applying a light beam to an optical memory medium, a beam splitter disposed in the optical path from the light source to the medium to separate the reflected beam from the medium from the beam from the light source, and a photodetector for detecting the separated reflected beam, having a surface opposed to that surface of the beam splitter which faces the photodetector is formed so as to form an angle different from the perpendicular with respect to the optic axis of the separated reflected beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.