Abstract
The paper presents the results of a study of the feasibility of using a dual-range diffraction reflecting grating applied to a convex mirror in a imaging hyperspectrometer based on the Offner scheme. The parameters of a small diffraction grating are chosen and large for operation in the spectral ranges of visible and middle infrared regions. The results of modeling the work of the proposed configuration of the diffraction grating are presented, which showed a negligibly small effect of a large diffraction grating on the work of small and vice versa, and the negligibly small effect of a small grating on the work of a large grating. A method is proposed for increasing the diffraction efficiency of a dual-range grating for operation in the +1 order in the visible range and in the −1 near IR range. The results of modeling using the software package Zemax
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