Optical information recording and reproducing apparatus

Details Optical information recording and reproducing apparatus Optical information recording and reproducing apparatus

1984-08-09

1987-04-07

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 44, G11B 7125

Patent

active

046566180

ABSTRACT:
In an optical information recording and reproducing apparatus having a laser light source and an optical system so that a beam from the laser light source is irradiated through the optical system on an information recording medium to record and reproduce information, an accousto-optic modulator is disposed in the optical system for receiving the beam from the laser light source, and a modulation unit is provided which comprises an oscillator for generating a plurality of signals at different frequencies, a modulator for modulating the outputs of the oscillator and an adder for adding together the outputs of the modulator.

REFERENCES:
patent: 4298974 (1981-11-01), Tsunoda et al.
patent: 4363116 (1982-12-01), Kleuters et al.
patent: 4449212 (1984-05-01), Reno
patent: 4520472 (1985-05-01), Reno
patent: 4566088 (1986-01-01), Yoshida et al.

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