Polarization phase shifting dispersed fringe sensor
نویسندگان
چکیده
منابع مشابه
Photoelastic Fringe Pattern Analysis by Real-time Phase-shifting Method
This paper describes high-speed phase-shifting method for the real-time analysis of isochromatic and isoclinic parameters in photoelasticity. By rotating an analyzer at a constant rate and an output quarter-wave plate at a double rate of the analyzer and recording images by a CCD camera continuously, sequential phase-shifted images which brightness is integrated by sensors are obtained. Then, t...
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متن کاملShannon information storage in fringe-patterns and fringe-data compression by phase-shifting algorithms
Standard optical phase-metrology fringe-patterns are digitized with XxY pixels and 8 bits/pixel (or higher) gray-levels. The digitized 8 bits/pixel are raw-data bits, not Shannon information bits. Here we show that noisy digital fringe-patterns store much lower amount of Shannon information than the capacity of the digitizing camera. This means that high signal-to-noise ratio (S/N) cameras may ...
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In spatial phase-shifting interferential system on polarization interference and grating beam-splitting, the azimuth errors of the polarizers are the central error sources of phase-shifting steps and have 1:1 effect for the steps. It applies two ways to determine the azimuth errors of the ploarizers: experimental testing and software calculating. The basic principle of experimental testing is t...
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Polarization based interferometers for single snap-shot measurements allow single frame, quantitative phase acquisition for vibration insensitive measurements of optical surfaces and have been successfully used on a variety of interferometer types. This technique generally involves the simultaneous acquisition of three or more images on the same camera or multiple cameras, which are phase shift...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2012
ISSN: 1094-4087
DOI: 10.1364/oe.20.003703