Head position control device

Details Head position control device Head position control device

1994-03-10

1995-09-05

Sugarman, Scott J.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 13, 369120, G11B 700

Patent

active

054485355

ABSTRACT:
A head position controlling device in which the head position may be controlled accurately even with a magneto-optical disc having regions with different reflectance values. A gap sensor consisting of a light emitting element 5 and light receiving elements 6 and 7 are arrayed along the track direction of a magneto-optical disc to prevent unequilibrium in the volume of received light at the light receiving elements 6 and 7.

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patent: 5031055 (1991-07-01), Yanagisawa
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patent: 5162661 (1992-11-01), Sato et al.
patent: 5216649 (1993-06-01), Koike et al.
Patent Abstracts of Japan, vol. 13, No. 590 (P-984) 6 Oct. 1989 & JP-A-1 251 359 (Seiko Epson Corp) 28 Mar. 1988-abstract.
Patent Abstracts of Japan, vol. 9, No. 157 (P-369 (1880) 2 Jul. 1985 & JP-A-60 032 143 (NEC Home Electronics K K) 19 Feb. 1985-abstract.
Patent Abstracts of Japan, vol. 6 No. 5 (P-97) (883) 13 Jan. 1982 & JP-A-56 130 603 (Ricoh K K) 13 Oct. 1981-abstract.

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