ACOUSTIC SIGNAL RECEIVING APPARATUS AND PHOTO-ACOUSTIC TOMOGRAPHY

摘要

An acoustic signal receiving apparatus including: a Fabry-Perot sensor including a Fabry-Perot interferometer configured to convert an acoustic wave into a light intensity signal; a control unit configured to set a first wavelength and a second wavelength; a detecting unit configured to convert light intensities obtained by irradiation of the Fabry-Perot sensor with light from the first light source and the second light source into electric signals; and a signal processing unit configured to acquire a difference between an electric signal corresponding to the first wavelength and an electric signal corresponding to the second wavelength, wherein the control unit is configured to set the first wavelength and the second wavelength so that differential values of reflectivity spectrum of the Fabry-Perot sensor are different at the first wavelength and the second wavelength.

主权项

1. An acoustic signal receiving apparatus comprising:
a Fabry-Perot sensor including a Fabry-Perot interferometer configured to convert an acoustic wave generated from a measurement object to a light intensity signal; a control unit configured to set a first wavelength and a second wavelength different from the first wavelength; a first light source configured to emit light having the first wavelength; a second light source configured to emit light having the second wavelength; a detecting unit configured to convert the light intensities of reflected rays of light obtained by irradiation of the Fabry-Perot sensor with rays of light from the first light source and the second light source into electric signals independently by the first wavelength and the second wavelength; and a signal processing unit configured to acquire a difference between an electric signal corresponding to the first wavelength and an electric signal corresponding to the second wavelength, wherein the control unit is configured to set the first wavelength and the second wavelength so that differential values of reflectivity spectrum of the Fabry-Perot sensor are different at the first wavelength and the second wavelength.