Far-infrared wavefront dividing interferometry using nonperiodic diffraction pattern

Karl Dieter Moeller

doi:10.1117/12.224224

13 October 1995 Far-infrared wavefront dividing interferometry using nonperiodic diffraction pattern

Karl Dieter Moeller

Proceedings Volume 2558, Millimeter and Submillimeter Waves II; (1995) https://doi.org/10.1117/12.224224
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

A new type of wavefront dividing reflection interferometer for the far infrared is discussed. The interferometer uses two sets of interpenetrating rings, one fixed and the other movable for the production of an interferogram. The advantage of this interferometer compared to the lamellar grating is higher modulation of shorter wavelengths. This modulation advantage is also applicable to transmission-reflection beamsplitters in a Mach-Zehnder interferometer. A two mirror wavefront dividing interferometer may be constructed so small that it fits in the deqar of a He-cooled detector. Using this interferometer, asymmetric Fourier transform spectroscopy may be conducted, yielding simultaneously the optical constants n and k with a sample and a reference interferogram.

Citation Download Citation

Karl Dieter Moeller "Far-infrared wavefront dividing interferometry using nonperiodic diffraction pattern", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); https://doi.org/10.1117/12.224224

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