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Proceedings Paper

ORFEUS alignment concept
Author(s): Roland Graue; Dirk Kampf; Harald Rippel; G. Witte
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Paper Abstract

The alignment concept of ORFEUS, a short-term scientific space payload scheduled for launching by the STS in January 1993, is discussed. ORFEUS comprises two alternatively operating spectrometers (Echelle and Rowland) implemented in a CFC telescope with a 4-m tube length and an aperture of 1000 mm. The lightweight primary mirror has a focal length of 2426 mm. In order to achieve the required spectrometric high telescope resolution in the UV range (40-125 nm), a sophisticated alignment concept was developed. The centering of the alignment diaphragm (diameter: 15 microns) in the focus of the primary mirror has to be provided in the vertical tube position by means of an autocollimation telescope. The spectrometers have to be integrated into the horizontal telescope aligned within a special antigravity device to reduce optical surface deformations and to ensure the optical performance of the primary. The alignment of all optical components is to be performed in the visible spectral range.

Paper Details

Date Published: 1 September 1991
PDF: 9 pages
Proc. SPIE 1494, Space Astronomical Telescopes and Instruments, (1 September 1991); doi: 10.1117/12.46737
Show Author Affiliations
Roland Graue, Kayser-Threde GmbH (Germany)
Dirk Kampf, Kayser-Threde GmbH (Germany)
Harald Rippel, Kayser-Threde GmbH (Germany)
G. Witte, Kayser-Threde GmbH (Germany)


Published in SPIE Proceedings Vol. 1494:
Space Astronomical Telescopes and Instruments
Pierre Y. Bely; James B. Breckinridge, Editor(s)

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