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Proceedings Paper

Optical Design Of The Hipparcos Telescope
Author(s): J. J. Arnoux; D. Dubet; M. Fruit
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Paper Abstract

The design and the development of the HIPPAR-COS payload all reflective Schmidt telescope have been driven by the highly demanding challenge of reaching an accuracy of 2 milli-arcseconds (1.E-8 radians) in star position measurements. This achievement is made possible by an original optical arrangement of the telescope, based on the capability to develop the so-called "beam combiner", which consists in a reflective Schmidt corrector cut in two halves and re-assembled by bonding with an angle of 29 degrees, with a final wavefront distortion of lambda / 60 RMS. The final optical performances of the telescope can be summarized by a loss of MTF better than 7 % with respect to the diffraction limit and a chromaticity lower than 3 milliarc-seconds. After a short description of the principle of Hipparcos measurement and of the telescope optical configuration and a recall of the chromaticity concept, this paper gives a presentation of the development of the optics especially of the Beam Combiner, and technics used for the alignment and test of the telescope.

Paper Details

Date Published: 20 October 1986
PDF: 10 pages
Proc. SPIE 0656, Contemporary Optical Instrument Design, Fabrication, and Testing, (20 October 1986); doi: 10.1117/12.938471
Show Author Affiliations
J. J. Arnoux, Matra Space Branch (France)
D. Dubet, Matra Space Branch (France)
M. Fruit, Matra Space Branch (France)

Published in SPIE Proceedings Vol. 0656:
Contemporary Optical Instrument Design, Fabrication, and Testing
Leo H. J. F. Beckmann; J. David Briers; Paul R. Yoder, Editor(s)

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