Patent ID: 8850867
Filing Date: 2014-10-07
Classification: G01N

Abstract:
1. A photoacoustic sensor, comprising a resonance body delimiting at least partly a volume being intended to hold molecules to be detected, and an apparatus for determining a vibration of the resonance body, comprising means for optically capturing a location of at least one subarea of the resonance body with at least two laser beams, wherein the resonance body is positioned for irradiation of the volume by a light in a plane that is approximately perpendicular to a plane of the at least two laser beams, wherein the resonance body and the apparatus for determining a vibration being arranged on a substrate, and wherein the resonance body is formed by at least one slit in the substrate and wherein the substrate comprises at least one of sapphire, langasite, magnesium oxide, and polymethyl methacrylate.