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Sensitive Photo-acoustic Detection Based On Resonance Enhancement And Resonance-frequency Modulation Disclosure Number: IPCOM000065622D
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-19

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Coufal, H Tam, AC [+details]


A sensitive photo-acoustic (PA) detection method is based on resonance enhancement and resonance-frequency modulation. This detection method involves a double modulation PA technique in which a parameter affecting the acoustic resonance of the PA cell is modulated and the light intensity of the tunable light source being modulated at a second frequency.