Optical pickup device with three beam tracking servo control usi

Details Optical pickup device with three beam tracking servo control usi Optical pickup device with three beam tracking servo control usi

1994-12-27

1997-05-27

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4437, G11B 709

Patent

active

056338449

ABSTRACT:
An optical pickup device for writing or reading data from an optical information recording medium has a recording layer whose state changes in response to a density of intensity of an irradiated light beam and a track being used for a tracking servo control system. The device includes a first light spot irradiating element for irradiating a writing or reading light beam onto the recording layer to form a writing or reading spot and a second light spot irradiating element for irradiating at least one controlling light beam onto the recording layer to form a controlling spot having a major axis extending along the track and being longer than a transverse axis perpendicular to the major axis within a level of luminous flux density keeping an original state of the recording layer, whereby a tracking servo control signal having a sufficient level is obtained.

REFERENCES:
patent: 5361244 (1994-11-01), Nakamura et al.

Affiliated with

Also associated with

Rating

Optical pickup device with three beam tracking servo control usi 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 pickup device with three beam tracking servo control usi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup device with three beam tracking servo control usi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2333997