Electrically controlled adjusting device for a light beam with d

Details Electrically controlled adjusting device for a light beam with d Electrically controlled adjusting device for a light beam with d

1977-03-08

1978-10-31

Corbin, John K.

Dynamic magnetic information storage or retrieval

Head

Core

350 63, 350 65, 360107, G11B 2102

Patent

active

041231473

ABSTRACT:
A light deflector used for tracking a spiral information track alternately and periodically interrupted by data blocks and guide segments arranged within sectors of a rotating record carrier. The light deflector is controlled during the first turn of the information track by a slow analog light deflector having a small stroke and is controlled during the remainder of the recording by a digital light deflector control device having a relatively large stroke.

REFERENCES:
patent: 3544980 (1970-12-01), Applequist et al.
patent: 3743794 (1973-07-01), Miller
Ramsay et al; "Barium Titanate Ceramics for Fine-Movement Control"; J. Sci. Instrum. 1962, vol. 39, pp. 636-637.

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