1968•Journal of the Optical Society of AmericaRequires access

Optical Wave-Front Mapping by Dual Interferometry*

Peter Langenbeck

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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Available abstract

Key concepts: Interferometry, Optics, Astronomical interferometer, Interference (communication), Superposition principle, Wavefront, Moiré pattern, Interferometric visibility