Dielectric optical filter with absorptive metal layer
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United States of America Patent
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-
Mar 7, 2000
Grant Date -
N/A
app pub date -
Mar 12, 1998
filing date -
Mar 27, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical filter, for absorbing a part of the optical signals with a central wavelength .lambda. and restricting the intensity of the transmitted light, includes a dielectric block with a high refractive index, a metal film, and a dielectric block with a low refractive index deposited on a substrate in that order in the direction of the incident light.
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