Optical track follower device with sampling

Details Optical track follower device with sampling Optical track follower device with sampling

1982-08-10

1985-08-13

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

230202, G11B 700, G11B 2110

Patent

active

045354316

ABSTRACT:
The invention relates to devices for optically transcribing in a track carried by a support medium data to be written in or read out. The invention provides a pre-engraved track follower device for a transcription device in which a loop for radial control of the reading spot scanning the track is provided with sampling means taking samples during scanning of nonpost-engraved parts of a pre-engraved track, said scanning corresponding to a data write or read phase. The invention applies more particularly for digital data transcription devices using a single spot for locating a pre-engraved track and since optically writing data therein.

REFERENCES:
patent: 3530321 (1970-09-01), Reitherman
patent: 3654624 (1972-04-01), Becker
patent: 3914595 (1975-10-01), Linet
patent: 3919697 (1975-11-01), Walker
patent: 3944727 (1976-03-01), Elliott
patent: 4094013 (1978-06-01), Hill
patent: 4198657 (1980-04-01), Kanamaru
patent: 4205338 (1980-05-01), Schaefer
patent: 4275275 (1981-06-01), Bricot
patent: 4283785 (1981-08-01), Miyouchi
patent: 4346471 (1982-08-01), Hirasawa
patent: 4366564 (1982-12-01), Hoan
patent: 4397010 (1983-08-01), Nabeshima
Patent Abstracts of Japan, vol. 2, No. 64, 5/17/78, p. 2100E78.

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