Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1994-10-31
1996-02-06
Ben, Loha
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369121, 369122, 359800, 359822, 362259, 362268, G11B 700
Patent
active
054901286
ABSTRACT:
An optical head of this invention includes: a light source emitting a plurality of beams from a plurality of emitting points; an optical system for focusing the plurality of beams on a recording medium; and an adjusting means for adjusting distances from the plurality of emitting points to the optical system, wherein the adjusting means includes a first member for supporting the light source and a second member for supporting the first member; the first member is rotatable around a central axis which is vertical to the plane including an optical axis of the optical system and the plurality of emitting points and passes through a point on the optical axis; and the second member is movable along a reference plane vertical to the optical axis.
REFERENCES:
patent: 4088396 (1978-05-01), Edelstein
patent: 4498737 (1985-02-01), Doggett
patent: 5008873 (1991-04-01), Tanaka et al.
patent: 5033040 (1991-07-01), Fujita
patent: 5144616 (1992-09-01), Yasukawa et al.
Ben Loha
Matsushita Electric - Industrial Co., Ltd.
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