Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

1990-01-08

1992-09-08

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369116, G11B 700

Patent

active

051464497

ABSTRACT:
An optical disc apparatus comprises a light source, an optical disc, a beam splitting element for splitting a light beam from the light source into a first beam and a second beam, a light detection element for detecting the second beam and outputting a detection signal, a control circuit for controlling an intensity of the light beam from the light source on the basis of the detection signal from the detection element, so that an intensity of the light beam from the light source is uniform, and an optical system through which the first beam passes, to reproduce the information recorded on the optical disc.

REFERENCES:
patent: 3705758 (1972-12-01), Haskal
patent: 4114180 (1978-09-01), Kayanuma
patent: 4162398 (1979-07-01), Kayanuma
patent: 4532619 (1985-07-01), Sugiyama et al.
patent: 4935915 (1990-06-01), Fujiwara et al.

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