Optical head and method of detecting the focus thereof

Details Optical head and method of detecting the focus thereof Optical head and method of detecting the focus thereof

1983-09-19

1986-12-02

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250201, 369 44, 369 45, G11B 7135

Patent

active

046266798

ABSTRACT:
An optical head comprises a light source unit for supplying a light beam, a condensing unit for condensing the light beam from the light source unit on an object surface and directing the light beam from the object surface to a detecting unit, the condensing unit being movable relative to the light source unit and the detecting unit, a detecting unit for detecting the light beam from the condensing unit, and a flexible optical transmitter forming an optical path leading from the light source unit to the condensing unit and an optical path leading from the condensing unit to the detecting unit.

REFERENCES:
patent: 4135083 (1979-01-01), Van Alem et al.
patent: 4455085 (1984-06-01), Kato et al.
patent: 4525625 (1985-06-01), Abe
patent: 4530080 (1985-07-01), Aoi et al.

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