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Record Details

Record 8 of 4153
Fabrication of a grazing incidence telescope by grinding and polishing techniques on aluminum
Author and Affiliation:
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)
Abstract: The 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.
Publication Date: Jan 01, 1991
Document ID:
19920042583
(Acquired Nov 22, 1995)
Accession Number: 92A25207
Subject Category: MECHANICAL ENGINEERING
Document Type: Conference Paper
Publication Information: (SEE A92-25201)
Publisher Information: United States
Meeting Information: X-ray/EUV Optics for Astronomy, Microscopy, Polarimetry and Projection Lithography; July 9-13, 1990; San Diego, CA; United States
Contract/Grant/Task Num: NAG5-96
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ALUMINUM; FABRICATION; GRAZING INCIDENCE TELESCOPES; GRINDING (MATERIAL REMOVAL); POLISHING; MIRRORS; OPTICAL MEASUREMENT; RONCHI TEST
Imprint And Other Notes: IN: X-ray/EUV optics for astronomy, microscopy, polarimetry, and projection lithography; Proceedings of the Meeting, San Diego, CA, July 9-13, 1990 (A92-25201 09-74). Bellingham, WA, Society of Photo-Optical Instrumentation Engineers, 1991, p. 155-161.
Availability Source: Other Sources
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