Variable optical attenuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 15, 1990
Grant Date -
N/A
app pub date -
Apr 21, 1987
filing date -
Apr 23, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable optical attenuator includes incoming and outgoing surfaces which are inclined relative to each other so that light reflected at an attenuating coating on one or both surfaces is reflected away from the optical path to avoid interference effects. The attenuating coating varies in density depending upon the angle of rotation of the attenuator. Variable attenuation may be achieved by rotating the attenuator a predetermined amount under microprocessor control.
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