Optical disc apparatus having a particular lasar source orientat

Details Optical disc apparatus having a particular lasar source orientat Optical disc apparatus having a particular lasar source orientat

1991-04-26

1993-06-08

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, 369 4423, G11B 7135

Patent

active

052185966

ABSTRACT:
An optical disc apparatus having a semiconductor laser (7), and a beam splitter (11) which guides a laser light emitted from the semiconductor laser to an optical disc (2) and also guides a laser light reflected from the optical disc (2) to a detection system for detecting information carried by the reflected light. The optical disc apparatus comprises an optical axis direction change device (10) provided between the semiconductor laser (7) and the beam splitter (11) for changing the direction of the laser light emitted from the semiconductor laser, wherein, the angle (.theta.) between the optical axis of the laser light emitted from the semiconductor laser and the laser light reflected from the optical disc is less than 90.degree..

REFERENCES:
patent: 4549287 (1985-10-01), Hatono et al.
patent: 4881216 (1989-11-01), Deguchi et al.
patent: 5070494 (1991-12-01), Emoto et al.
patent: 5115423 (1992-05-01), Maeda et al.
patent: 5121378 (1992-06-01), Hirose et al.
ISO/IEC JTC1 Information Technology SC23, "Optical Digital Disks", pp. 73 and 74, published on Mar. 16, 1990.
Abstract of the JP-3-22235 (A) Magneto-Optical Disk Recording and Reproducing Device, Jan. 30, 1991 Masayuki Suzuki.
Abstract of the JP-3-2236 (A) Small-Sized Magneto-Optical Disk Device Jan. 30, 1991 Yasuo Hachi(3).

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