Optical apparatus for optical information recording medium

Details Optical apparatus for optical information recording medium Optical apparatus for optical information recording medium

1988-10-05

1991-08-27

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369116, 369112, 369 4414, G11B 2110, G11B 712

Patent

active

050439650

ABSTRACT:
An optical apparatus for an optical information recording medium including a light source, two acoustooptical elements for modulating the light beam emitted from the light source and an objective lens for focusing the light beam emitted from the acoustooptical elements to the optical information recording medium, the acoustooptical elements being provided in an optical path extending from the light source to the objective lens arranged such that directions of travel of supersonic waves generated in the respective acoustooptical elements are crossed to each other.

REFERENCES:
patent: 4223347 (1980-09-01), Bauwhuis et al.
patent: 4535431 (1985-08-01), Bricot et al.
patent: 4703408 (1987-10-01), Yonezawa et al.
Y. Okino, "Summary of Optical Disk Processing Technique", Nihon Kogyo Technical Center, May 15, 1985.
"Information Processing Systems--Optical Digital Data Disk", The Fifth Draft Proposal, pp. 19-29.

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