Optical pickup apparatus which includes a plate-like element for

Details Optical pickup apparatus which includes a plate-like element for Optical pickup apparatus which includes a plate-like element for

1991-07-24

1993-09-28

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369110, G11B 7135

Patent

active

052491676

ABSTRACT:
The present invention provides an optical pickup apparatus for reading informational signals written in a recording medium such as magneto-optical disc in which a flux of reflected light from a recording medium which is irradiated with a flux of light in inclinedly incident from one side upon a flat plate like transparent member having one side which is a polarization reflection surface and the other side which is a total reflection surface and fluxes of light reflected on the one side and the other side of the flat plate like transparent member are detected by a photo detecting element, whereby simplification of the structure is achieved.

REFERENCES:
patent: 4797868 (1989-01-01), Ando
patent: 4863246 (1989-09-01), Anthon

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