Optical head device and optical disk unit capable of stable...

Details Optical head device and optical disk unit capable of stable... Optical head device and optical disk unit capable of stable...

2005-08-02

2005-08-02

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053200, C369S053260

Reexamination Certificate

active

06925046

ABSTRACT:
The present invention relates to an optical head unit and an optical disk unit using the optical head unit. The head unit includes a wavefront transforming optical element control unit to controls a wavefront transforming optical element so as not to transform wavefront of a light beam focused on a recording layer by a focusing unit due to the thickness error of a light transmission layer positioned between the recording layer and the focusing unit based on an electrical signal outputted from a first light detector, and an output control unit that controls light amount of a light beam radiated by a light emitting unit based on the magnitude of the electrical signal outputted from the light detector.

REFERENCES:
patent: 6730896 (2004-05-01), Yamada
patent: 3-160632 (1991-07-01), None
patent: 11-110802 (1999-04-01), None
patent: 11-259906 (1999-09-01), None
patent: 2000-30290 (2000-01-01), None
patent: 2001-110082 (2001-04-01), None

Affiliated with

Also associated with

Rating

Optical head device and optical disk unit capable of stable... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical head device and optical disk unit capable of stable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical head device and optical disk unit capable of stable... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3523550