Optical data recording and reproducing apparatus with plane para

Details Optical data recording and reproducing apparatus with plane para Optical data recording and reproducing apparatus with plane para

1992-05-27

1993-06-29

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4437, 369112, G11B 709

Patent

active

052240843

ABSTRACT:
An optical data reproducing apparatus in which a light beam is diffracted into three light beams. The three light beams are reflected by a first surface of a plane parallel plate and applied through an objective lens to a recording medium, which forms three signal light beams. The three signal light beams are reflected back to the plane parallel plate and partially reflected by a second surface of the plate. A first optical detector detects one of the three signal light beams, which corresponds to a main light beam of the 0-th order of diffraction. A second optical detector detects the remaining two of the three signal light beams which correspond to auxiliary light beams of the +1st and -1st order of diffraction. The second optical detector outputs a tracking error signal accordingly.

REFERENCES:
patent: 4358200 (1982-11-01), Heemskerk et al.
patent: 4753513 (1988-06-01), Shikama
patent: 4768183 (1988-08-01), Ohnishi et al.
patent: 4817072 (1989-03-01), Toide et al.
patent: 5185731 (1993-02-01), Takahashi

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1761183