23 August 2017 Design of two-dimensional (crossed) grating calculation in Czerny-Turner spectrometer with usage of freeform mirrors
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Abstract
The possibility of building a spectrometer based on a flat two-dimensional (crossed) grating is being considered. The most suitable layout for this is the Czerny - Turner, where a spectral image lies in the plane. In this paper an attempt to compensate for the transverse aberrations is made by using a diffraction grating with variable spacing grooves in both sections and aspheric mirror elements of layout, including ones having a freeform surface. Using crossed grating greatly simplifies the device layout and may be particularly effective when used in the ultraviolet and infrared regions of the spectrum, due to a small choice of transmissive materials for manufacturing spectral prisms. This paper gives examples of such case.
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Yury Bazhanov, Elena Demura, Rasima Cherkashina, Vadim Vlahco, "Design of two-dimensional (crossed) grating calculation in Czerny-Turner spectrometer with usage of freeform mirrors", Proc. SPIE 10375, Current Developments in Lens Design and Optical Engineering XVIII, 103750V (23 August 2017); doi: 10.1117/12.2272175; https://doi.org/10.1117/12.2272175
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