Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1997-04-30
1999-10-19
Hantis, K. P.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
G01N 2100
Patent
active
059698250
ABSTRACT:
An improvement to a dual-modulation line-locking device for wavelength modulation spectroscopy employing a lowpass filter to generate a nonnormalized error signal and a bandpass filter and RMS-to-DC converter to generate a centering signal. When the error signal is approximately zero and the centering signal is large, the wavelength is coincident with the center of the absorption feature of the sample.
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Bomse David S.
Silver Joel A.
Hantis K. P.
Myers Jeffrey D.
Pangrle Brian J.
Southwest Sciences Incorporated
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