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Proceedings Paper

Ultralightweight off-axis three-mirror anastigmatic SiC visible telescope
Author(s): Joseph L. Robichaud; Michael I. Anapol; Leo R. Gardner; Peter Hadfield
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Paper Abstract

The next generation of space-borne optical sensor will have to meet tight weight limitation, in order to be viable on smaller, less expensive, launch platforms, while supporting a wide range of mission scenarios. Wide spectral coverage, near-diffraction limited visible quality performance, and increased thermal and structural stability are becoming important features for future space-hardware. SiC represents an emerging technology which is gaining wider acceptance as the leading candidate for the next generation of space flight hardware. As a material for all-reflective flight telescopes and optical benches, SiC offers: the lightweight and stiffness characteristics of beryllium; glass-like inherent stability consistent with visible quality performance levels; superior thermal properties down to cryogenic temperatures and in the presence of large thermal gradients; and an existing, commercially based material and processing infrastructure like aluminum. This paper describes an all-SiC off-axis, three mirror anastigmatic telescope system which promises to meet these stressing technical requirements. The system described maintains a 35 cm entrance aperture with a weight of 14 kgs.

Paper Details

Date Published: 23 October 1995
PDF: 5 pages
Proc. SPIE 2543, Silicon Carbide Materials for Optics and Precision Structures, (23 October 1995); doi: 10.1117/12.225287
Show Author Affiliations
Joseph L. Robichaud, Sensor Systems Group, Inc. (United States)
Michael I. Anapol, Sensor Systems Group, Inc. (United States)
Leo R. Gardner, Sensor Systems Group, Inc. (United States)
Peter Hadfield, Sensor Systems Group, Inc. (United States)


Published in SPIE Proceedings Vol. 2543:
Silicon Carbide Materials for Optics and Precision Structures
Mark A. Ealey, Editor(s)

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