Journal ArticleDOI
Optical Wave-Front Mapping by Dual Interferometry*
TLDR
In this paper, the same instrument in different alignment enhances the sharpness of reflection multiple-beam fringes or reverses their contrast for a transmission-like appearance for wavefront mapping by coupling of two interferometers.Abstract:
Some advanced methods of wave-front mapping by coupling of two interferometers are described. Moire-like superposition of interferograms eliminates certain inherent interferometer errors. Moire interferometry indicates the direction of the order of interference.The same instrument in different alignment enhances the sharpness of reflection multiple-beam fringes or reverses their contrast for a transmissionlike appearance.read more
Citations
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Journal ArticleDOI
Bibliography of Various Optical Testing Methods
TL;DR: A bibliography of various methods of optical testing has been compiled, with the papers grouped by subject, e.g., Fizeau interferometer.
Journal ArticleDOI
Fizeau interferometer-fringe sharpening.
TL;DR: A vector representation of the formation of fringe profiles in a Fizeau (wedge) interferometer shows that, under certain conditions, off-axis illumination may lead to fringe sharpening.
Journal ArticleDOI
Moiré methods in interferometry
TL;DR: The applications of moire methods to optical interferometry are reviewed in this article, where they are used for instrumental error subtraction, reduction of spatial frequency of interferogram fringes, increase of sensitivity, and various information processing operations.
Patent
Sliding reference interferometer
TL;DR: An interferometer for rapidly measuring the phase profile and intensity distribution of a high powered continuous wave laser beam was proposed in this article, where the interference pattern was focused on a high-speed optical chopper containing slits equal to half the width of each interference fringe pattern and the fringe radiation passing through the slits was detected by a transducer that generates an electrical sinusoidal output signal having a frequency corresponding to the chopper modulating frequency, but phase-shifted left or right by an amount corresponding to phase variations in the scanned wave front.
References
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Journal ArticleDOI
The Determination of Poisson's Ratio and of the Absolute Stress-variation of Refractive Index
TL;DR: In this article, a ready method of determining the stress-optical coefficients, the Hilger interferometer being employed Young's modulus of elasticity and Poisson's ratio are determinable simultaneously.
Journal ArticleDOI
Transmission Fringes in Reflection Multiple-Beam Interferometry
Jose Pastor,Paul H. Lee +1 more
TL;DR: In this article, the transmission fringes in reflection multiple-beam interferometry are obtained independently of the characteristics of the reference surface by coupling a two-beam Interferometer to the MIMO.