Optical system for optical disc apparatus including anamorphic prisms
US5477386A · kind A · utility
13Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1992 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Jul 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical system of an optical disc apparatus is disclosed for converging and projecting a bundle of rays emitted from a light source onto an optical disc. The optical system includes a collimating lens which collimates the bundle of rays emitted from the light source, two anamorphic prisms for shaping the cross section of the collimated bundle of rays transmitted through the collimating lens, and an objective lens which converges the bundle of rays shaped by the anamorphic prisms onto the optical disc. At least one of the anamorphic prisms is detachably mounted to an immovable body portion of the optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.