Optical data recording/reproducing apparatus and optical data st

Details Optical data recording/reproducing apparatus and optical data st Optical data recording/reproducing apparatus and optical data st

1995-01-12

1997-07-22

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4436, 369 4441, G11B 709

Patent

active

056509871

ABSTRACT:
Disclosed is an optical data apparatus for recording and regenerating data on an optical disc, optical card, or the like. There are particularly disclosed an optical data apparatus and an optical data storage medium appropriate for the apparatus capable of detecting a tracking error signal effective particularly for an optical data storage medium on which optical data are recorded at a high density. A pattern is formed on a track and in a position displaced from the track by half cycle of the track in a first servo pattern area, and no pattern is formed in a second servo pattern area. The first servo pattern area and the second servo pattern area are arranged adjacent to each other. The tracking error signal is obtained through multiplication of differential signals obtained at the timing of Sa1 and Sa2. The tracking error signal can be detected up to a spatial cutoff frequency twice as high as the frequency in the conventional case by means of a conventional optical system.

REFERENCES:
patent: 3876841 (1975-04-01), Kramer et al.
patent: 3919697 (1975-11-01), Walker
patent: 4006293 (1977-02-01), Bouwhuis et al.
patent: 4023033 (1977-05-01), Bricot et al.
patent: 4079247 (1978-03-01), Bricot et al.
patent: 4535431 (1985-08-01), Bricot et al.
patent: 4553228 (1985-11-01), Gerard et al.
patent: 4587644 (1986-05-01), Fujiie
patent: 5034940 (1991-07-01), Saito et al.
patent: 5150345 (1992-09-01), Shikichi et al.
patent: 5191571 (1993-03-01), Fukumoto et al.

Affiliated with

Also associated with

Rating

Optical data recording/reproducing apparatus and optical data st 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 data recording/reproducing apparatus and optical data st, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical data recording/reproducing apparatus and optical data st will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1564595