Broad band polarizing beam splitter
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Mar 15, 1995
filing date -
Mar 15, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A broad band polarizing beam splitter includes a first prism, including an incident beam surface, and an interface surface. A second prism is also included with an interface surface. The second prism is positioned adjacent to the first prism with the interface surfaces of the first and second prisms being adjacent to each other. A coating is disposed between the two interface surfaces. The coating is made of a geometric or arithmetic progression of layer thicknesses of alternating high and low refractive indices. A ratio of high refractive index to low refractive index is 1.1 or greater.
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