Optical head device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
Dec 1, 2005
app pub date -
May 25, 2005
filing date -
May 27, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An optical head device may include an objective lens drive device for driving an objective lens, an optical path defining optical system which defines an optical path directing to the objective lens from the light source and an optical path directing to a light receiving element from the objective lens, a device frame which holds the objective lens drive device on an upper face side of the device frame and on which the optical path defining optical system is mounted, an aberration compensating element which is mounted on the upper face of the device frame and disposed between the optical path defining optical system and the objective lens for compensating aberration of the laser beam that is converged on the optical recording disk, and a wavelength plate which is disposed between the optical path defining optical system and the objective lens for converting a polarization direction of the laser beam emitted from the optical path defining optical system.
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Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G11B Class
- 2.15 % this patent is cited more than
- 20 Age