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11 June 2019 Spectrometers based on acousto-optic tunable filters for in-situ lunar surface measurement
Zhiping He, Chunlai Li, Rui Xu, Gang Lv, Liyin Yuan, Jianyu Wang
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Journal of Applied Remote Sensing, Vol. 13, Issue 2, 027502 (June 2019). https://doi.org/10.1117/1.JRS.13.027502
Abstract
The lunar surface consists of rocks of varying sizes and shapes, which are made of minerals, such as pyroxene, plagioclase, olivine, and ilmenite, that exhibit distinctive spectral characteristics in the visible and near-infrared (VIS–NIR) and short-wave infrared (SWIR) regions. To analyze the composition of the lunar surface minerals, several spectrometers based on acousto-optic tunable filters (AOTFs) have been developed to detect lunar surface objects and to obtain their reflectance spectra and geometric images. These spectrometers, including the VIS–NIR imaging spectrometer onboard China’s Chang’e 3/4 unmanned lunar rovers and the Lunar Mineralogical Spectrometer onboard the Chang’e 5/6 lunar landers, use AOTFs as dispersive components. Both are equipped with a VIS/NIR imaging spectrometer, one or several SWIR spectrometers, and a calibration unit with dust-proofing functionality. They are capable of synchronously acquiring the full spectra of the lunar surface objects and performing in-situ calibrations. We introduce these instruments and present a brief description of their working principle, implementation, operation, and major specifications, in addition to the initial scientific achievement of lunar surface exploration.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Zhiping He, Chunlai Li, Rui Xu, Gang Lv, Liyin Yuan, and Jianyu Wang "Spectrometers based on acousto-optic tunable filters for in-situ lunar surface measurement," Journal of Applied Remote Sensing 13(2), 027502 (11 June 2019). https://doi.org/10.1117/1.JRS.13.027502
Received: 1 November 2018; Accepted: 22 May 2019; Published: 11 June 2019
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KEYWORDS
Spectrometers
Calibration
Short wave infrared radiation
Acousto-optics
Tunable filters
Minerals
Signal to noise ratio
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