Acoustic resonance frequency locked photoacoustic spectrometer
Patent
·
OSTI ID:1174487
A photoacoustic spectroscopy method and apparatus for maintaining an acoustic source frequency on a sample cell resonance frequency comprising: providing an acoustic source to the sample cell, the acoustic source having a source frequency; repeatedly and continuously sweeping the source frequency across the resonance frequency at a sweep rate; and employing an odd-harmonic of the source frequency sweep rate to maintain the source frequency sweep centered on the resonance frequency.
- Research Organization:
- Southwest Sciences, Incorporated, Santa Fe, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG03-99ER82887
- Assignee:
- Southwest Sciences, Incorporated
- Patent Number(s):
- 6,618,148
- Application Number:
- 09/782,138
- OSTI ID:
- 1174487
- Country of Publication:
- United States
- Language:
- English
New developments in CO2-laser photoacoustic monitoring of trace gases
|
journal | February 1995 |
Design and characterization of a windowless resonant photoacoustic chamber equipped with resonance locking circuitry
|
journal | March 1991 |
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