High precision optical metrology for DARWIN: design and performance

Details High precision optical metrology for DARWIN: design and performance High precision optical metrology for DARWIN: design and performance

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.554..501c&link_type=abstract

In: Proceedings of the 5th International Conference on Space Optics (ICSO 2004), 30 March - 2 April 2004, Toulouse, France. Ed.:

Physics

Optics

2

Optical Metrology, Darwin

Scientific paper

The ESA DARWIN project uses a set of telescopes based on free flying satellites and operated as an aperture synthesis system. The relative position of all these satellites has to be maintained with a very high accuracy. This is only possible with the help of a very high precision metrology system. We present here in a first part the requirements for the optical metrology of DARWIN and the proposed definition of the metrology systems needed to answer these requirements. In the second part we present the design of the various systems. Eventually we give the results of the performance tests of breadboards that have been manufactured in the framework of the ESA study "High Precision Optical Metrology" to validate these designs.

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