Dynamic focus adjustment for transmissive or reflective optical

Details Dynamic focus adjustment for transmissive or reflective optical Dynamic focus adjustment for transmissive or reflective optical

1980-02-11

1982-03-30

Konick, Bernard

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369112, 350255, 250201, G11B 700

Patent

active

043228380

ABSTRACT:
An optical disc reader is provided in which automatic focussing is achieved by movements of elements completely removed from the moving head which travels across the optical disc.

REFERENCES:
patent: 3861786 (1975-01-01), Badgett
patent: 3911209 (1975-10-01), Bouwhuis
patent: 3944727 (1976-03-01), Elliott
patent: 4003059 (1977-01-01), Suqiura
patent: 4030815 (1977-06-01), Andrevski
patent: 4051529 (1977-09-01), Miyaoka

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