26 November 2001 Analysis of Spacelab-III reconstructed wavefronts by nonholographic methods
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Holography has been used in several past space missions. One popular experimental mode deals with the study of fluid refractive properties in a crystal growth cell. The perceived advantage of holography is that it stores the reconstructed wavefronts so that complete information is available later on the ground. That means the wavefront can be analyzed not only by traditional holographic interferometry but by other means as well. We successfully demonstrate two such methods described here. One is deflectometry using a Ronchi grating and the other confocal optical processing. These results, using holograms from the Spacelab-III mission dealing with triglycine sulfate crystal growth clearly demonstrate that a single data collection system can perform the task of several fluid experimental systems. Finally, the possibility of using reconstructed wavefronts with other analysis modes like speckle techniques and video holography are discussed. The present study firmly establishes the advantages of holography.
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Chandra S. Vikram, William K. Witherow, "Analysis of Spacelab-III reconstructed wavefronts by nonholographic methods", Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); doi: 10.1117/12.449389; https://doi.org/10.1117/12.449389

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