24 August 2015 Instantaneous phase-shifting Fizeau interferometry with high-speed pixelated phase-mask camera
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Proceedings Volume 9660, SPECKLE 2015: VI International Conference on Speckle Metrology; 966018 (2015) https://doi.org/10.1117/12.2196420
Event: SPECKLE 2015: VI International Conference on Speckle Metrology, 2015, Guanajuato, Mexico
Abstract
A Fizeou interferometer with instantaneous phase-shifting ability using a Wollaston prism is designed. to measure dynamic phase change of objects, a high-speed video camera of 10-5s of shutter speed is used with a pixelated phase-mask of 1024 × 1024 elements. The light source used is a laser of wavelength 532 nm which is split into orthogonal polarization states by passing through a Wollaston prism. By adjusting the tilt of the reference surface it is possible to make the reference and object beam with orthogonal polarizations states to coincide and interfere. Then the pixelated phase-mask camera calculate the phase changes and hence the optical path length difference. Vibration of speakers and turbulence of air flow were successfully measured in 7,000 frames/sec.
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Toyohiko Yatagai, Toyohiko Yatagai, Boaz Jessie Jackin, Boaz Jessie Jackin, Akira Ono, Akira Ono, Kosuke Kiyohara, Kosuke Kiyohara, Masato Noguchi, Masato Noguchi, Minoru Yoshii, Minoru Yoshii, Motosuke Kiyohara, Motosuke Kiyohara, Hayato Niwa, Hayato Niwa, Kazuyuki Ikuo, Kazuyuki Ikuo, Takashi Onuma, Takashi Onuma, } "Instantaneous phase-shifting Fizeau interferometry with high-speed pixelated phase-mask camera", Proc. SPIE 9660, SPECKLE 2015: VI International Conference on Speckle Metrology, 966018 (24 August 2015); doi: 10.1117/12.2196420; https://doi.org/10.1117/12.2196420
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