Optical reproducing system

Details Optical reproducing system Optical reproducing system

1983-04-20

1985-12-31

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

350375, 360113, 365122, G11B 532, G11B 702

Patent

active

045625026

ABSTRACT:
An optical reproducing system for reading out magnetically recorded data comprises an optical head (4,4a,4b,4c,4d) for copying magnetic pattern on a magnetic recording medium like a magnetic tape (1), a conversion system (5,6,7,8,9,10) for converting a magnetic pattern on the optical head (4 et al.) to an optical pattern by using the Faraday effect which rotates a polarization of an LED beam (light emission diode) or a laser beam according to magnetic polarity in a domain in said optical head, a charge coupled device (3, CCD) with a plurality of cells for converting beam energy polarized according to recorded data to correspond to electrical output signal. The CCD device effects the conversion or reading of a plurality of data simultaneously.

REFERENCES:
patent: 3158673 (1964-11-01), Sites
patent: 3500354 (1970-03-01), Smith et al.
patent: 3651498 (1972-03-01), Magill et al.
patent: 3668671 (1972-06-01), Everett et al.
patent: 3899778 (1975-08-01), Roberts
patent: 3952290 (1976-04-01), Wiliams
patent: 4228473 (1980-10-01), Himuro et al.
Kump et al., "Laser Readout for Magnetic Film Memory," IBM Tech. Disc. Bull., Feb. 1966, vol. 8, No. 9, pp. 1244-1245.

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