METHOD FOR IMPROVING SIGNAL-TO-NOISE OF PHOTOACOUSTIC SIGNAL MEASURED WITH PHOTOACOUSTIC DETECTOR

摘要

The present invention provides a method for improving the signal-to-noise ratio of a photoacoustic signal generated by the light absorber and measured by a photoacoustic meter when an incident beam is absorbed by the light absorber in order to grasp the position or characteristics of the light absorber. is about According to the present invention, when the processing apparatus performs matched filtering processing on the photoacoustic signal in the frequency domain, the signal-to-noise ratio of the photoacoustic signal can be improved as the processing device is configured to use the chirp signal spectrum from which the DC component is removed. There are advantages that can be