Testing By Holographic Interferometry Of Solid Propergol Engines

Paul Smigielski; Daniel Cesario; Claude Patanchon

doi:10.1117/12.956156

18 April 1978 Testing By Holographic Interferometry Of Solid Propergol Engines

Paul Smigielski, Daniel Cesario, Claude Patanchon

Author Affiliations +

Proceedings Volume 0136, 1st European Conf on Optics Applied to Metrology; (1978) https://doi.org/10.1117/12.956156
Event: First European Conference on Optics Applied to Metrology, 1977, Strasbourg, France

Abstract

We present an application of holographic interferometry by double exposure to non-destructive test-ing of solid propergol engines 350 Ian in diameter and 1000 mm in length at a maximum. The apparatus in -stalled for industrial use is described. It permits us to easily visualize defecth in the adhesive of 10 rrm x 7 mm under 2.5 mm of thermic protection by application of a weak pneumatic stress (around 10 oraigl. The engine is placed in a vacuum chamber provided with an observation port. The parasitical contour fringes due to the variations in refractive index of the air with the partial vacuum can be eliminated by the use of a different gas with each of the two exposures of the hologram. Results concerning real engines are shown.

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Paul Smigielski, Daniel Cesario, and Claude Patanchon "Testing By Holographic Interferometry Of Solid Propergol Engines", Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); https://doi.org/10.1117/12.956156

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