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Fabrication of a grazing incidence telescope by grinding and polishing techniques on aluminumThe paper describes the fabrication processes, by grinding and polishing, used in making the mirrors for a f/2.8 Wolter type-I grazing incidence telescope at Boulder (Colorado), together with testing procedure used to determine the quality of the images. All grinding and polishing is done on specially designed machine that consists of a horizontal spindle to hold and rotate the mirror and a stroke arm machine to push the various tools back and forth along the mirrors length. The progress is checked by means of the ronchi test during all grinding and polishing stages. Current measurements of the telescope's image quality give a FWHM measurement of 44 arcsec, with the goal set at 5-10 arcsec quality.
Document ID
19920042583
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gallagher, Dennis
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cash, Webster
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Green, James
(Colorado, University Boulder, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Mechanical Engineering
Meeting Information
Meeting: X-ray/EUV Optics for Astronomy, Microscopy, Polarimetry and Projection Lithography
Location: San Diego, CA
Country: United States
Start Date: July 9, 1990
End Date: July 13, 1990
Accession Number
92A25207
Funding Number(s)
CONTRACT_GRANT: NAG5-96
Distribution Limits
Public
Copyright
Other

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