Apparatus for retrieving a track on a recording medium by a ligh

Details Apparatus for retrieving a track on a recording medium by a ligh Apparatus for retrieving a track on a recording medium by a ligh

1992-03-24

1993-09-07

Chin, Tommy

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 32, G11B 509, G11B 1552, G11B 2012, G11B 2722

Patent

active

052435865

ABSTRACT:
In an optical or magneto-optical recording and/or reproducing apparatus, an apparatus for locating a pre-designated one of a large number of tracks on the recording medium by a light beam at a high speed during signal recording, reproduction or erasure. The light beam irradiated on the recording medium is swept in the direction of traversing the tracks, the reflected light of the light beam from the recording medium is detected by a photodetector, and a predesignated one of the tracks is retrieved on the basis of the results of detection of the reflected light. The sweeping movement of the light beam is controlled by feedback control of the track traverse velocity of the light beam prevailing until the beam gets to the predesignated track. The velocity detection system for detecting the track traverse velocity is provided with a pulse generator for generating, on the basis of the detection signal by the photodetector, an m number of pulses per on n number of tracks traversed by the light beam until it gets to the predesignated track, a counter for measuring the period of the generated pulse and a velocity computing circuit for computing, on the basis of the count value by the counter, the track traverse velocity of the light beam prevailing until the beam gets to the predesignated track.

REFERENCES:
patent: 4835752 (1989-05-01), Nakatsu et al.
patent: 4868819 (1989-09-01), Kimura
patent: 4955009 (1990-09-01), Nakatsu et al.

Affiliated with

Also associated with

Rating

Apparatus for retrieving a track on a recording medium by a ligh does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for retrieving a track on a recording medium by a ligh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for retrieving a track on a recording medium by a ligh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-493245