Browse Prior Art Database

Sensitive Photo-acoustic Detection Based On Resonance Enhancement And Resonance-frequency Modulation

IP.com Disclosure Number: IPCOM000065622D
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Coufal, H Tam, AC [+details]

Abstract

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.