Reflection grating spectrometer based on AOTF

Qian Tang; Guo Qing Zhang; Chun Min Zhang; Bao Chang Zhao

doi:10.1117/12.2565203

17 April 2020 Reflection grating spectrometer based on AOTF

Qian Tang, Guo Qing Zhang, Chun Min Zhang, Bao Chang Zhao

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114555Y (2020) https://doi.org/10.1117/12.2565203
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

As for detecting the atmosphere, a spectrometer includes five sub-spectrometers (two UV spectrometers, one VIS/IR spectrometer and two SWIR spectrometers) covering 240-2400nm is proposed. The spectrometer will be operated at height of 400km in three viewing modes (Limb, Occultation and Nadir). The spatial resolution is better than 100km² in the three modes. This article introduces one of the five sub-spectrometers which is based on AOTF (AOTF: Acoustic-Optic Tunable Filter) and working in 1500-2400nm. This scheme utilizes AOTF to select different spectral ranges with 80cm^-1 wave number, and then realizes the resolution of 0.1nm ( λ/Δλ >10⁵ ) by a reflection grating. Instead of the parabolic reflector, a transmission light group is selected. The detail design indexes are given and stimulated by Zemax.

Citation Download Citation

Qian Tang, Guo Qing Zhang, Chun Min Zhang, and Bao Chang Zhao "Reflection grating spectrometer based on AOTF", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114555Y (17 April 2020); https://doi.org/10.1117/12.2565203

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KEYWORDS

Spectroscopy

Spectral resolution

Objectives

Sensors

Spatial resolution

Short wave infrared radiation

Diffraction gratings

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