1 December 2003 Near-real-time phase difference amplification using multiple-beam interferometry and a liquid-crystal-phase-only spatial light modulator
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Optical Engineering, 42(12), (2003). doi:10.1117/1.1623285
Abstract
Phase difference amplification is a technique used to produce a fringe contour map in which the optical path difference between one fringe and the next is a fraction of a wavelength. To ensure high accuracy of the technique, it is usually necessary to generate interference between the high-order diffracted beam and its conjugate beam by means of a holographic recording material that provides sufficiently large nonlinearity to record the original fringe pattern from the test object. This paper shows that not only the nonlinearity of the recording material, but also multiple-beam interference, can be used to produce high-order diffracted beams. A Tolansky-type multiple-beam interferometer has been used in conjunction with an optically addressed liquid-crystal spatial light modulator to set up a system that functions in near real time and provides high accuracy.
Kiyofumi Matsuda, Geoffrey T. Bold, Tomas H. Barnes, Tomoaki Eiju, Chander Prakash Grover, Colin J. R. Sheppard, "Near-real-time phase difference amplification using multiple-beam interferometry and a liquid-crystal-phase-only spatial light modulator," Optical Engineering 42(12), (1 December 2003). http://dx.doi.org/10.1117/1.1623285
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KEYWORDS
Interferometers

Mirrors

Fringe analysis

Interferometry

Phase shift keying

Phase interferometry

Phase modulation

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