Objective lens system for optical pickups
US6922289B2 · kind B2 · utility
1Cited by
14References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | May 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/13922
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An objective lens system for optical pickups reading and/or writing information by condensing a luminous flux from a light source onto an optical information recording medium, consists of, a single lens having, from a light source side, a first surface convex to the light source side and a second surface convex to an image side. A medium of the single lens is a homogeneous medium. At least one of the two surfaces is aspherical. The system satisfies the predetermined conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.