
Proceedings Paper
Vacuum focus testing of large telescopesFormat | Member Price | Non-Member Price |
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Paper Abstract
The advent of large telescopes for remote sensing presents special challenges for optical testing, particularly for
verifying focal plane array alignment. If testing in air, the large well-enclosed telescope cavity can create air stagnation
or thermal gradient effects that can distort the optical wavefront unpredictably, resulting in noisy and inaccurate
measurements. Testing in vacuum presents instrumentation challenges but eliminates the air effects and provides
excellent data. This paper describes the experimental setups and compares through-focus test results for a large remote
sensing telescope when tested in both air and in a vacuum.
Paper Details
Date Published: 26 September 2007
PDF: 8 pages
Proc. SPIE 6677, Earth Observing Systems XII, 66770B (26 September 2007); doi: 10.1117/12.732189
Published in SPIE Proceedings Vol. 6677:
Earth Observing Systems XII
James J. Butler; Jack Xiong, Editor(s)
PDF: 8 pages
Proc. SPIE 6677, Earth Observing Systems XII, 66770B (26 September 2007); doi: 10.1117/12.732189
Show Author Affiliations
John J. Lumia, Ball Aerospace and Technologies Corp. (United States)
Published in SPIE Proceedings Vol. 6677:
Earth Observing Systems XII
James J. Butler; Jack Xiong, Editor(s)
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