Polarization selective holographic optical element
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United States of America Patent
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May 7, 1991
Grant Date -
N/A
app pub date -
Sep 15, 1988
filing date -
Sep 15, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polarization-selective holographic element having first and second holographic layers, each holographic layer including holograms comprising a plurality of fringes. The holographic optical element transmits a first component of light without diffraction and diffracts a second component of the light by a selected angle. The holographic optical element diffracts the second component into only one beam. The holographic optical element can be utilized as a beam splitter which is provided with optical power, for use in an optical head, by storing holograms for cylindrical and other powers and for auto-focusing and tracking capabilities.
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