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Cryogenic (70K) measurement of an all-composite 2-meter diameter mirrorThe Herschel Space observatory (formerly known as FIRST) consists of a 3.5 m space telescope. In order to develop lightweight telescope technology suitable for this mission, COI designed and fabricated aspherical, f/1 2 m aperture prototype primary mirror using solely carbon fiber reinforced polypmer (CFR) materials. To assess the performance of this technology, optical metrology of the mirror surface was performed from ambient to an intended operational temperature for IR-telescopes of 70K. Testing was performed horizontally in a cryogenic vacuum chamber at Arnold Engineering Development Center (AEDC), Tennessee.
Document ID
20060031893
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Catanzaro, B.
Connell, S.
Mimovich, M.
Backovsky, S.
Williams, G.
Thomas, James A.
Barber, D.
Johnston, R.
Hylton, J.
Dodson, K.
Cohen, E.
Date Acquired
August 23, 2013
Publication Date
August 22, 2001
Subject Category
Optics
Distribution Limits
Public
Copyright
Other
Keywords
lightweight mirrors cryogenic testing composite materials phase shifting
interferometer

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