FIELD: measuring equipment engineering.
SUBSTANCE: device has attenuator of light flow with drive, two electric signals generators of different frequencies, outputs of which are connected to drives of light flow attenuator and interference filter, and receiver of radiation is made receptive only to variable component of light flow.
EFFECT: lower interference, higher efficiency.
1 dwg
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Authors
Dates
2004-10-20—Published
2002-08-20—Filed