Optical Wave-Front Mapping by Dual Interferometry*
Journal of the Optical Society of America1968Vol. 58(4), pp. 499–499
Abstract
Some advanced methods of wave-front mapping by coupling of two interferometers are described. Moiré-like superposition of interferograms eliminates certain inherent interferometer errors. Moiré 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.
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