Optical pickup apparatus and laser diode chip
US6912234B2 · kind B2 · utility
0Cited by
14References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2001 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Jan 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup apparatus and a laser diode chip which can simplify and miniaturize a construction of the apparatus is provided for using a plurality of laser beams of different wavelengths. The laser diode chip is a chip for the optical pickup apparatus in which a plurality of light emitting portions for emitting the laser beams of the different wavelengths in the same emitting direction are formed on a substrate. Light emitting points of the plurality of light emitting portions are located at positions which are different in the emitting direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.