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Proceedings Paper

Optimized setup for active compensation of distortions for interferometric techniques onboard the International Space Station
Author(s): Christoph von Kopylow; Volker Kebbel; Joachim Becker; Werner Jüptner
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Paper Abstract

The main part of the Fluid Science Laboratory (FSL) that is under development for the Columbus Orbital Facility is the Optical Diagnosis Module (ODM). It provides quantitative measurements of fluid science experiments with the help of different interferometric techniques. The assembly of these methods is based on a Mach-Zehnder-Interferometer. Because of the employment on the FSL the design of this interferometer has several requirements regarding volume, mass, modularity, operational needs and especially an environment with thermal and mechanical distortions of the interferometer. At BIAS an interferometer was designed that detects the misalignment due to external distortions and compensates it. The design is based on a simplified Hartmann-Sensor and detects wavefront tilt and curvature errors. The active compensation of these errors is realized by piezoelectric driven optical components and operates in realtime but cannot compensate the curvature errors completely. In this paper we describe the construction of a modified setup that compensates wavefront tilt and curvature errors in a temperature range from 15°C to 35°C sufficiently for the planned applications. The new design is substantial simpler and hence the passive stability is better as well. The results of thermal tests with the new setup are demonstrated and show the enhanced stability of the new actively stabilized interferometer.

Paper Details

Date Published: 14 August 2006
PDF: 10 pages
Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 62920J (14 August 2006); doi: 10.1117/12.681697
Show Author Affiliations
Christoph von Kopylow, Bremer Institut für Angewandte Strahltechnik (Germany)
Volker Kebbel, a&a technologies (Germany)
Joachim Becker, ESA/ESTEC (Netherlands)
Werner Jüptner, Bremer Institut für Angewandte Strahltechnik (Germany)


Published in SPIE Proceedings Vol. 6292:
Interferometry XIII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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