Optical spectral filter and linear positioner therefor
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United States of America Patent
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Aug 11, 1998
Grant Date -
N/A
app pub date -
Oct 25, 1996
filing date -
Oct 25, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-wavelength optical filter for a portabe gas analyzer includes a filter assembly having a first opening and multiple additional openings. The first opening has a linearly variable filter disposed therein, while the additional openings have discrete filters disposed therein. The filters are linearly aligned, such that filter selection is facilitated by using the filter assembly with a linear positioning mechanism.
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