Optical recording system using refracted write beam for erasing

Details Optical recording system using refracted write beam for erasing Optical recording system using refracted write beam for erasing

1987-01-23

1988-06-28

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 7085, G11B 7125

Patent

active

047544465

ABSTRACT:
A multi-beam optical record/playback system includes optical elements for directing pluralities of write and read beams as respective diffraction limited spots on the optically-sensitive surface of a rotating disk. The spots on the disk are positioned such that information can be read immediately after it is written. A prism is selectively interposed in the path of write beams for the purpose or erasing previously recorded information. The prism refracts the write beams, causing a shift of its diffraction limited spots to positions behind the corresponding read spots, thus allowing the read beams to track recorded information which is subsequently erased by the light from the refracted beams.

REFERENCES:
patent: 3614448 (1971-10-01), DiPros et al.
patent: 3696344 (1972-10-01), Feinleib et al.
patent: 3983317 (1976-09-01), Glorioso
patent: 4097895 (1978-06-01), Spong
patent: 4125859 (1978-11-01), Oshida et al.
patent: 4275275 (1981-06-01), Bricot et al.
patent: 4298974 (1981-11-01), Tsunoda et al.
patent: 4459690 (1984-07-01), Corsover et al.
patent: 4520472 (1985-05-01), Reno
patent: 4689780 (1987-08-01), Ohara et al.
Wai-Hon Lee, High Efficiency Multiple Beam Gratings from Applied Optics, Jul. 1, 1979, pp. 2152-2158.

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