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Proceedings Paper

Toroidal variable-line-space gratings: the good, the bad, and the ugly
Author(s): Edward West; Ken Kobayashi; Jonathan Cirtain; Allen Gary; John Davis; Joseph Reader
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Paper Abstract

Toroidal variable-line-space (VLS) gratings are very important in the design of an efficient VUV solar telescope that will measure the CIV (155nm) and MgII (280nm) emissions lines in the Sun's transition region. In 1983 Kita and Harada described spherical VLS gratings but the technology to commercially fabricate these devices is a recent development, especially for toroidal surfaces. This paper will describe why this technology is important in the development of the Solar Ultraviolet Magnetograph Investigation (SUMI) sounding rocket program (the good), the delays due to the conversion between the TVLS grating design and the optical fabrication (the bad), and finally the optical testing, alignment and tolerancing of the gratings (the ugly).

Paper Details

Date Published: 21 August 2009
PDF: 12 pages
Proc. SPIE 7433, Optical System Alignment, Tolerancing, and Verification III, 74330I (21 August 2009); doi: 10.1117/12.825709
Show Author Affiliations
Edward West, NASA Marshall Space Flight Ctr. (United States)
Ken Kobayashi, The Univ. of Alabama in Huntsville (United States)
Jonathan Cirtain, NASA Marshall Space Flight Ctr. (United States)
Allen Gary, The Univ. of Alabama in Huntsville (United States)
John Davis, NASA Marshall Space Flight Ctr. (United States)
Joseph Reader, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 7433:
Optical System Alignment, Tolerancing, and Verification III
José Sasián; Richard N. Youngworth, Editor(s)

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