Patent ID: 9116111
Filing Date: 2015-08-25
Classification: A61B,G01H,G01N

Abstract:
1. An acoustic signal receiving apparatus comprising: a wavelength-tunable light source for irradiating measurement light; a controller for controlling a wavelength of the measurement light; a Fabry-Perot probe including a first mirror positioned on a side where the measurement light enters, a second mirror positioned on a side where an elastic wave from an object enters, and a spacer film that is positioned between the first and second mirrors and deforms in response to the entrance of the elastic wave; an array photosensor for detecting a reflected light amount of the measurement light by the Fabry-Perot probe; and a signal processor for acquiring an intensity of the elastic wave having entered the Fabry-Perot probe based on a change in the reflected light amount resulting from the deformation of the spacer film, wherein the controller sweeps the wavelength of the measurement light, and the signal processor determines, based on the reflected light amount at each position of the Fabry-Perot probe that is acquired at each wavelength subjected to the sweep, the wavelength of the measurement light used at the position.