Protection member and optical pickup device using the same
US7710846B2 · kind B2 · utility
0Cited by
0References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Jul 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from the optical information recording medium, the protection member including an ultrahigh molecular weight polyethylene porous film; and an optical pickup device having the protection member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.