Thin film polarizing device
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United States of America Patent
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Jun 15, 1999
Grant Date -
N/A
app pub date -
Aug 12, 1996
filing date -
Aug 12, 1996
priority date (Note) -
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Abstract
A thin film polarizing device has first and second light transmissive substrates in the form of prisms and a plurality of thin film layers disposed between the prisms. The thin film layers and have predetermined thicknesses and refractive indices which allow unpolarized incident light to be separated into s-polarized and p-polarized light beams. Both frustrated total internal reflection and thin film interference are simultaneously employed to allow s-polarized light to be transmitted and p-polarized light to be reflected over a wide range of wavelengths and angles of incidence. The polarizing device may be used as a polarizer or a polarizer beam splitter.
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