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Proceedings Paper

COSTAR phase I alignment description
Author(s): Robert B. Slusher; Michael L. Kaplan; Michael J. Satter; Mark A. Martella; Victor A. Buzzetta
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Paper Abstract

The corrective optics space telescope axial replacement (COSTAR) configuration contains mechanisms in each science instrument channel that allow for on-orbit correction for image plane focus and for lateral and axial mapping of the Hubble Space Telescope (HST) primary mirror onto the aspheric corrector mirrors. The optical alignment of the COSTAR optics is accomplished in two phases. In Phase I, the mirror bezel tilts and lateral positions are determined through the use of surrogate flat mirrors with the mechanism's positions held at the mid-range of their travel. The Phase I alignment is followed by Phase II interferometric optimization of all five optical channels. At the conclusion of the Phase I alignment, the optics are positioned accurately enough to allow simultaneous correction of most channels on orbit through the use of the mechanism compensation and telescope fine-pointing control. Individual mirror positions and orientations are determined through the use of alignment telescopes, theodolites, alignment lasers, and reference fiducials incorporated into the COSTAR Alignment System (CAS).

Paper Details

Date Published: 15 October 1993
PDF: 22 pages
Proc. SPIE 1996, Optical Alignment, (15 October 1993); doi: 10.1117/12.160415
Show Author Affiliations
Robert B. Slusher, Ball Aerospace (United States)
Michael L. Kaplan, Ball Aerospace (United States)
Michael J. Satter, Ball Aerospace (United States)
Mark A. Martella, Ball Aerospace (United States)
Victor A. Buzzetta, Ball Aerospace (United States)

Published in SPIE Proceedings Vol. 1996:
Optical Alignment
Mitchell C. Ruda, Editor(s)

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