Contrast enhancement in double-beam interferometers

Ignacy Filinski

doi:10.1117/12.171866

3 May 1994 Contrast enhancement in double-beam interferometers

Ignacy Filinski

Proceedings Volume 1846, Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications; (1994) https://doi.org/10.1117/12.171866
Event: Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications, 1992, Warsaw, Poland

Abstract

The interferometer fringe contrast ratio C is the most important figure of merit for interferometer performance. Low values of contrast drastically limit the use of double beam interferometers. The large values of contrast present in common path interferometers indicate that this deterioration is due to beam separation produced by nonideal beam splitters. Minimizing the negative effects of such beam splitters by the use of Double Beam Circular Interferometers (DBCI) and the use of plane- parallel beam splitters as well as collimating optics is suggested. Several new types of interferometers are described with improved contrast and stability.

Citation Download Citation

Ignacy Filinski "Contrast enhancement in double-beam interferometers", Proc. SPIE 1846, Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications, (3 May 1994); https://doi.org/10.1117/12.171866

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