Optical information reproducing apparatus

Details Optical information reproducing apparatus Optical information reproducing apparatus

1993-02-03

1995-08-29

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4412, 369112, 369122, 369 4437, G11B 700, G11B 713

Patent

active

054467195

ABSTRACT:
An optical information reproducing apparatus of the invention includes a light emitting and receiving unit and an optical system. The optical system converges light from the light emitting and receiving unit on a recording medium and converges the light after reflected by the recording medium. The light emitting and receiving unit includes: a semiconductor laser device disposed on a substrate for generating light; a photo detector formed, integrally with the substrate, on the substrate on which the semiconductor laser device is disposed, for outputting a signal corresponding to the intensity of light incident thereon; and a beam splitter provided on an optical axis of the reflected light, the beam splitter leading part of the reflected light to the photo detector.

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patent: 5233580 (1993-08-01), Tanaka et al.
patent: 5247506 (1993-09-01), Sugiura
patent: 5293367 (1994-03-01), Kadowaki et al.

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