Low profile optical head
US7227817B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1356
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head of a type useable in a optical disk reader/writer is provided. The optical head has a low profile, e.g., in a vertical direction parallel to the disk spin axis, such as less than about 5 mm preferably less than about 3 mm. Substantially all components of the optical system, including a laser source, objective lens, intervening optics and photo detector are provided in the optical head and mounted in a fixed position with respect to one another. Substantially all optical components of the optical head are moved as a unit, e.g., during tracking and/or focusing. Preferably, the optical head is fabricated using wafer scale and/or stacking technologies, e.g., stacking substantially planar components to achieve the final optical head configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.