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Proceedings Paper

Point diffraction interferometric system utilized in the bubble drop and particle unit (BDPU): performance assessment and suggestions for future improvements
Author(s): Sergio Musazzi; Umberto U. Perini; Franco Trespidi
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Paper Abstract

The Point Diffraction Interferometer (PDI) is a self-referencing interferometer. A reconfigurable PDI based optical system provided with the automatic control of the alignment has been developed to study fluids in microgravity. It will be flown on board of the IML2 Space Shuttle mission as a part of the Bubble Drop and Particle Unit (BDPU). Main features of the developed system are the automatic control of the alignment and the possibility of changing configuration (from a PDI scheme into a Dark Field mode of operation). To minimize the payload specialist manipulations the system is completely automatic, i.e. the alignment of the system during the start-up operations and the change of configuration are made automatically. System performances have been evaluated during laboratory tests on the apparatus and will be presented here. Future improvements of the PDI apparatus have also been investigated. They mainly concern the laser source, the alignment search procedure and the mechanism of the positioning of the diagnostic tools on the test beam.

Paper Details

Date Published: 30 September 1994
PDF: 8 pages
Proc. SPIE 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics, (30 September 1994); doi: 10.1117/12.188091
Show Author Affiliations
Sergio Musazzi, CISE (Italy)
Umberto U. Perini, CISE (Italy)
Franco Trespidi, CISE (Italy)

Published in SPIE Proceedings Vol. 2210:
Space Optics 1994: Space Instrumentation and Spacecraft Optics
Thierry M. Dewandre; Joachim J. Schulte-in-den-Baeumen; Emmanuel Sein, Editor(s)

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