Optical pickup device for use in a video and/or audio disc player
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United States of America Patent
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-
Jan 31, 1984
Grant Date -
N/A
app pub date -
Mar 31, 1981
filing date -
Mar 31, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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