Point diffraction interferometric system utilized in the bubble drop and particle unit (BDPU): performance assessment and suggestions for future improvements

Sergio Musazzi; Umberto U. Perini; Franco Trespidi

doi:10.1117/12.188091

30 September 1994 Point diffraction interferometric system utilized in the bubble drop and particle unit (BDPU): performance assessment and suggestions for future improvements

Sergio Musazzi, Umberto U. Perini, Franco Trespidi

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Proceedings Volume 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics; (1994) https://doi.org/10.1117/12.188091
Event: Space Optics '94, 1994, Garmisch, Germany

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.

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Sergio Musazzi, Umberto U. Perini, and Franco Trespidi "Point diffraction interferometric system utilized in the bubble drop and particle unit (BDPU): performance assessment and suggestions for future improvements", Proc. SPIE 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics, (30 September 1994); https://doi.org/10.1117/12.188091

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KEYWORDS

Sensors

Mirrors

Servomechanisms

Diagnostics

Signal detection

Particles

Automatic control

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