Oscillator element for photo acoustic detector

Details Oscillator element for photo acoustic detector Oscillator element for photo acoustic detector

2007-11-05

2011-10-18

Nguyen, Sang (Department: 2886)

Optics: measuring and testing

For light transmission or absorption

C356S437000, C073S024020

Reexamination Certificate

active

08040516

ABSTRACT:
An oscillator element is provided, e.g., for use in a photo acoustic detector for detecting a concentration of a sample in a sample mixture using a light beam for excitation of molecules of the sample in proximity of an excitation area of the oscillator element. The oscillator element includes piezoelectric material for generating a voltage when mechanically distorted. Electrodes at least partially cover a surface of the oscillator element for detecting the generated voltage. The excitation area is arranged in such a way that heating of the electrodes in the excitation area by the light beam is avoided.

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