Spectrographs with high angular dispersion: design and optimization approach

Eduard Muslimov; Ilnur Nureev; Oleg Morozov; Artem Kuznetsov; Lenar Faskhutdinov; Airat Sakhabutdinov; Nadezhda Pavlycheva

doi:10.1117/1.OE.57.12.125104

17 December 2018 Spectrographs with high angular dispersion: design and optimization approach

Eduard Muslimov, Ilnur Nureev, Oleg Morozov, Artem Kuznetsov, Lenar Faskhutdinov, Airat Sakhabutdinov, Nadezhda Pavlycheva

Author Affiliations +

Optical Engineering, Vol. 57, Issue 12, 125104 (December 2018). https://doi.org/10.1117/1.OE.57.12.125104

Abstract

We present an approach to design and optimize a high angular dispersion spectrograph optical scheme. Such an instrument can be built using two volume-phase holographic gratings mounted one after another and simple focusing optics. However, this solution may suffer from high angular and spectral selectivity on the second grating. We propose a design technique combining simple raytracing with diffraction efficiency optimization based on analytical and numerical computations. As an example, we demonstrate a few versions of a compact spectrograph for the 830 to 870 nm near infrared range. Its spectral resolution is up to 0.01 nm, and after the optimization, the efficiency can reach 64.9%, while remaining very uniform for the entire range. Also, by the use of grisms instead of gratings, it is possible to make the optical design axial while keeping almost the same performance and eliminating misalignment issues.

Citation Download Citation

Eduard Muslimov, Ilnur Nureev, Oleg Morozov, Artem Kuznetsov, Lenar Faskhutdinov, Airat Sakhabutdinov, and Nadezhda Pavlycheva "Spectrographs with high angular dispersion: design and optimization approach," Optical Engineering 57(12), 125104 (17 December 2018). https://doi.org/10.1117/1.OE.57.12.125104

Received: 21 August 2018; Accepted: 27 November 2018; Published: 17 December 2018

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