Optical pickup device for use in a video and/or audio disc playe

Details Optical pickup device for use in a video and/or audio disc playe Optical pickup device for use in a video and/or audio disc playe

1981-03-31

1984-01-31

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

350402, G11B 700

Patent

active

044293780

ABSTRACT:
An optical pickup device is placed in a video and/or audio disc player operative to reproduce information recorded in the form of an optical pattern such as a train of pits on a recording disc, in which the direction of light beam emitted from a light source is parallel to the propagation path of light impinging onto and reflected from the recording disc toward a photosensor. A polarization prism is used to deflect the light from the light source toward the recording disc, which prism cooperates with a quarter wave plate to act as a beam splitter.

REFERENCES:
patent: 3969576 (1976-07-01), Boonstra
patent: 4005259 (1977-01-01), Kaneko
patent: 4100577 (1978-07-01), Naruse
"Integrated Autofocusing System and Method of Manufacture" by Gaston, IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct.1980, pp. 1906-1908.

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