
Proceedings Paper
A novel algorithm of wave front time domain testingFormat | Member Price | Non-Member Price |
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Paper Abstract
In order to achieve the surface testing of entire caliber large-aperture optical elements, the distance between the
tested piece and the interferometer is often several meters to tens of meters. In such long optical path the impact of
environment vibration and air turbulence are inevitable, which seriously affects the accuracy of the interferometry
and also limits the possibility of processing and testing large optical system. This paper presents a novel algorithm
of wave front time domain detection, which needn't equal interval phase shifting and precise calibration of the
phase-shifting step, just by means of using the environment vibration and air turbulence as phase shifters. On basis
of enough interfergrams light intensity vs time curves of each point can be achieved. Light intensity vs phase
curves of each point can be figured out by proposed algorithm. Then, we can gain the phase value of each point in
terms of the light intensity, and also the wave surfaces corresponding to each interfergram by the unwrapping
calculation. As result, we can obtain the stable wave surface wiping off random vibration and air turbulence under
taking of average on all wave surfaces. Compared to conventional phase shifting interferometry algorithms, this
algorithm can effectively decrease the impact of vibration and air turbulence within the interferometric
measurement, enhance its ability of anti-jamming, and improve the adaptability, particularly in real-time detection
of 1arge-aperture mirror.
Paper Details
Date Published: 12 March 2008
PDF: 7 pages
Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 662412 (12 March 2008); doi: 10.1117/12.791109
Published in SPIE Proceedings Vol. 6624:
International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing
Liwei Zhou, Editor(s)
PDF: 7 pages
Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 662412 (12 March 2008); doi: 10.1117/12.791109
Show Author Affiliations
Qiudong Zhu, Beijing Institute of Technology (China)
Published in SPIE Proceedings Vol. 6624:
International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing
Liwei Zhou, Editor(s)
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