Optimum design of a grazing-incidence flat-field spectrograph with a spherical varied-line-space grating.
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.
Harada
T
T
Department of Mechanical Engineering, Tokyo Metropolitan University, 1-1 Minami-Oswa, Hachioji-shi, Tokyo 192-0397, Japan.
Takahashi
K
K
Sakuma
H
H
Osyczka
A
A