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.
© 1999 Optical Society of America
(050.1950) Diffraction and gratings : Diffraction gratings
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(220.1000) Optical design and fabrication : Aberration compensation
(260.7200) Physical optics : Ultraviolet, extreme
Tatsuo Harada, Kaoru Takahashi, Hideo Sakuma, and Andrzej Osyczka, "Optimum Design of a Grazing-Incidence Flat-Field Spectrograph with a Spherical Varied-Line-Space Grating," Appl. Opt. 38, 2743-2748 (1999)