Polarizing filter and its manufacturing method
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United States of America Patent
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Jul 9, 2002
Grant Date -
N/A
app pub date -
Mar 29, 2000
filing date -
Mar 30, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a transmission-polarizing filter comprising a substrate (1) and a partially metallized grating (2) carried by this substrate (1). The grating is a holographic grating, having a profile (3) with facets (4, 5) with, alternately, positive slopes (4) and negative slopes (5), whereas one of both sets of these facets with positive or negative slopes is partially metallized. The filter is manufactured by making a holographic grating on a substrate, by metallizing the said substrate and by machining the said substrate partially according to an ionic process.
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