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Optimum design of a grazing-incidence flat-field spectrograph with a spherical varied-line-space grating
T Harada1, K Takahashi, H Sakuma
1Department of Mechanical Engineering, Tokyo Metropolitan University, 1-1 Minami-Oswa, Hachioji-shi, Tokyo 192-0397, Japan.
Applied Optics
|March 6, 2008
Abstract:
A grazing-incidence spectrograph is designed by use of the flat-field image-focusing property of a spherical varied-line-space grating. Optimum grating parameters for mechanical ruling are selected by application of genetic algorithms. Two gratings, one for 2-5-nm and the other for 5-20-nm spectral regions, are designed, and their fabrication tolerances are analyzed.

