Direct detection of acoustic waves by laser light diffraction and proposals of the optophone

@inproceedings{Sonoda1998DirectDO,
  title={Direct detection of acoustic waves by laser light diffraction and proposals of the optophone},
  author={Yoshiyuki Sonoda},
  year={1998}
}
The application of the Fraunhofer diffraction method, which has been developed in the nuclear fusion research, totheacoustic waves was experimentally examined It is demonstrated that the waves with a wavelength longer than 85 mm can be detected by using a visible laser, which is extremely longer than the standard value measurable by the conventional light diffraction methd, Furthermore, as a new technics with no diaphragm, the optical microphone (or the optophone) is proposed and its property… CONTINUE READING