Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1979-12-11
1981-12-08
Konick, Bernard
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369275, G11B 2110, G11B 700
Patent
active
043051448
ABSTRACT:
A tracking mirror reflects monochromatic divergent light toward a rotating record disc provided with an engraved spiral track. The reflected light is focussed, as an optical spot, on the track by a collecting lens. Light reflected from and diffracted by the track is focussed onto an optical detector in a diffraction pattern including a principal maximum and bilaterial secondary maxima. The optical detector detects the principal maximum to form a reproduced signal and differentially detects the secondary maxima to produce a tracking signal. The mirror along with the lens and optical detector unit is moved in response to the tracking signal to cause the optical spot to follow the track.
REFERENCES:
patent: T953002 (1976-12-01), Firester
patent: 3913076 (1975-10-01), Lehureau et al.
patent: 3919465 (1975-11-01), Adler et al.
patent: 3931459 (1976-01-01), Korpel
patent: 4011400 (1977-03-01), Simons et al.
patent: 4051527 (1977-09-01), Braat
patent: 4051529 (1977-04-01), Miyaoka
patent: 4057833 (1977-11-01), Braat
patent: 4058834 (1977-11-01), Miyaoka
patent: 4059841 (1977-11-01), Bricot et al.
patent: 4065786 (1977-12-01), Stewart
Konick Bernard
McElheny Jr. Donald
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Optically reproducing and tracking system for spiral information does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically reproducing and tracking system for spiral information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically reproducing and tracking system for spiral information will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-570773