Optical microphone based on a modulated diffractive lens

@article{Sagberg2003OpticalMB,
  title={Optical microphone based on a modulated diffractive lens},
  author={H{\aa}kon Sagberg and A. Sudbo and Olav Solgaard and K.A.H. Bakke and I. Johansen},
  journal={IEEE Photonics Technology Letters},
  year={2003},
  volume={15},
  pages={1431-1433}
}
The authors present an optical microphone based on a diffractive lens. The distance between the diffractive lens and a reflecting microphone membrane determines the light intensity at the focal point of the lens. With this design, an integrated micromachined microphone transducer can be mass produced at low cost. They describe the sensing principle… CONTINUE READING