Laser-based spectroscopic detection techniques

Details Laser-based spectroscopic detection techniques Laser-based spectroscopic detection techniques

2006-09-05

2006-09-05

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

Reexamination Certificate

active

07102751

ABSTRACT:
One embodiment of the present invention includes: a modulated laser light source to transmit an interrogation light beam to a region including a substance for spectroscopic evaluation, a detector responsive to modulated light from the region to provide a corresponding modulated signal, and a signal processing subsystem responsive to the modulated signal to generate a spectroscopic absorption peak representation. This subsystem also estimates absorbance based on a derivative form of an absorption peak and a residual amplitude modulation level corresponding to the absorption peak.

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