Device for compensating the lack of balance of a deviating mirro

Details Device for compensating the lack of balance of a deviating mirro Device for compensating the lack of balance of a deviating mirro

1984-07-20

1986-05-13

Faber, Alan

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 44, 369119, 250202, G11B 7095

Patent

active

045891028

ABSTRACT:
A device makes it possible to eliminate the imbalance of a deviating mirror of an optical system which illuminates a data medium or support when that mirror is subject to rapid displacement. The imbalance is cancelled by the use of a photodetector device which receives the light reflected by a reflecting element positioned around the objective of the optical system which illuminates the medium. A control device then makes it possible to control the position of the mirror based upon the light given off by the reflecting element.

REFERENCES:
patent: 3588218 (1971-06-01), Hunt et al.
patent: 3654624 (1972-04-01), Becker
patent: 3944727 (1976-03-01), Elliott
patent: 3978278 (1976-08-01), Bouwhuis
patent: 4268745 (1981-05-01), Okano
patent: 4344164 (1982-08-01), Bricot
patent: 4423496 (1983-12-01), Opheij
Patents Abstracts of Japan, vol. 2, No. 121, 10/12/78, p. 7078E78 and JP-A-53-87203 (Nippon Victor) (01-08-1978).
Patents Abstracts of Japan, vol. 1, No. 37, 13-03-1978, p. 102E78 and JP-A-53-3305 (Mitsubishi Denki) (13-01-1978).
Patents Abstracts of Japan, vol. 4, No. 78, 6/6/80, p. 26P14 and JP-A-55-42304 (Universal Paionia) (25-03-1980).

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