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Proceedings Paper

Infrared Interferometers At 10 µm
Author(s): Jacques Lewandowski; Bernard Mongeau; Maurice Cormier; Jean Lapierre
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Paper Abstract

The two infrared (10µm) wavefronts of an interferometer (Michelson or Mach-Zehnder) interfere separately with a tilted reference beam on a dynamic recording medium consisting of a thin oil film on a glass substrate. Illumination of this twin hologram with a visible (HeNe) beam reconstructs simultaneously, in the same direction, two wavefronts characteristic of each arm of the interferometer. Practical realization and experimental constraints, such as air turbulence and mechanical vibrations, are easily satisfied with these long-wave-length interferometers. Experimental results include air wedge determination, homogeneity test of a NaCl plate, step deposit evaluation and afocal assembly analysis. The real-time aspect of our recording medium also permits the visual observation of transient phenomena.

Paper Details

Date Published: 25 November 1986
PDF: 8 pages
Proc. SPIE 0661, Optical Testing and Metrology, (25 November 1986); doi: 10.1117/12.938602
Show Author Affiliations
Jacques Lewandowski, College Militaire Royal (Canada)
Bernard Mongeau, College Militaire Royal (Canada)
Maurice Cormier, College Militaire Royal (Canada)
Jean Lapierre, Ecole Polytechnique (Canada)


Published in SPIE Proceedings Vol. 0661:
Optical Testing and Metrology
Chander Prakash Grover, Editor(s)

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