Open AccessToroidal variable-line-space gratings: the good, the bad, and the ugly
Author(s) -
E. A. West,
K. Kobayashi,
Jonathan Cirtain,
A Gary,
John M. Davis,
Joseph Reader
Publication year - 2009
Publication title -
proceedings of spie, the international society for optical engineering/proceedings of spie
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.192
H-Index - 176
eISSN - 1996-756X
pISSN - 0277-786X
DOI - 10.1117/12.825709
Subject(s) - sounding rocket , grating , toroid , optics , line (geometry) , physics , ultraviolet , telescope , fabrication , rocket (weapon) , space (punctuation) , aerospace engineering , computer science , astronomy , engineering , medicine , plasma , geometry , mathematics , alternative medicine , pathology , quantum mechanics , operating system
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).
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