Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1991-11-18
1992-09-22
Richardson, Robert L.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4436, G11B 700
Patent
active
051503450
ABSTRACT:
An optical information recording apparatus includes a recording device for condensing a light beam into a spot-like shape, the light beam having been intensity-modulated between at least two levels which are not zero, scanning the light beam on a recording medium and recording information thereon; a detector for detecting a signal indicative of the position error between the light beam spot and the medium in the focusing direction perpendicular to the surface of the medium or the tracking direction in a plane parallel to the surface of the medium which is perpendicular to tracks formed on the medium; a servo device for correcting the position error on the basis of the detected signal; a device for varying the gain of the servo device in conformity with the intensity level of the light beam for producing a gain output; and a device for sampling and holding the gain output as the intensity of the light beam shifts between different levels.
REFERENCES:
patent: 4467462 (1984-08-01), Shibata
patent: 4535431 (1985-08-01), Bricot et al.
patent: 4593386 (1986-06-01), Kawabara et al.
patent: 4603410 (1986-07-01), Yoshida
patent: 4611317 (1986-09-01), Takeuchi et al.
patent: 4616354 (1986-10-01), Yoshida
patent: 4661942 (1987-04-01), Yoshimoto et al.
patent: 4701603 (1987-10-01), Dakin et al.
patent: 4710909 (1987-12-01), Tsuyoshi et al.
patent: 4751695 (1988-06-01), Kaku et al.
patent: 4813031 (1989-03-01), Bierhoff
patent: 4912697 (1990-03-01), Enari et al.
Drexon Laser Memory Card Equipment Development and Licensing Program "Quarterly Report No. 8", Jan. 1985, pp. 1-16.
Drexon Laser Memory Card Equipment Development and Licensing Program "Final Report", Jun. 1986, pp. 6-1 to 6-72.
Kanda Shigeto
Shikichi Satoshi
Canon Kabushiki Kaisha
Richardson Robert L.
LandOfFree
Optical information recording apparatus provided with means for 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 information recording apparatus provided with means for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical information recording apparatus provided with means for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1074906