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		| Paper: | 
		Optical Schemes of Spectral Instruments with Nonclassical Gratings | 
	 
	
		| Volume: | 
		494, Physics and Evolution of Magnetic and Related Stars | 
	 
	
		| Page: | 
		340 | 
	 
	
		| Authors: | 
		Muslimov, E. R.; Pavlycheva, N. K. | 
	 
	
	
		| Abstract: | 
		We present an overview of the optical schemes of the spectrographs based on nonclassical gratings. A general analytical approach to the optical design is discussed. Then a number of spectrograph schemes, corresponding design techniques, and results of modeling and experiments are presented. A special emphasis is placed on the compact high-aperture and medium-resolution schemes, which can be of interest for the astronomical applications. | 
	 
	
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