Reproduction of optically recorded signal

Details Reproduction of optically recorded signal Reproduction of optically recorded signal

1989-05-12

1990-11-06

Stephan, Steven L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4411, 369112, 2502015, G11B 700

Patent

active

049691422

ABSTRACT:
In reproduction of signal recorded on an optical disk by irradiation of laser light beam thereon, interference between reflected diffracted light of +1th order or -1th order and reflected diffracted light of 0th order is coersively induced, and by detecting the interference light, a high frequency signal can be reproduced.

REFERENCES:
patent: 4349901 (1982-09-01), Howe
patent: 4356392 (1982-10-01), Wittekoek
patent: 4569038 (1986-02-01), Nagoshima
"Thermal Changes of Optical Properties Observed in some Suboxide thin films", J. Appl. Phys. 53(12, Dec. 1982, Takeo Ohta et al., pp. 8497-8500.
"TeOx Thin Films for an Optical Disc Memory", J. Appl. Phys. 54(9), Sep. 1983, Mutsuo Takenaga, et al., pp. 5376-5380.

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