Research on spectral calibration of the hyperspectral irradiance-meter in near-infrared band (900-1700nm)

Quan Zhang; Xin Li; Wenchao Zhai; Xiaobing Zheng

doi:10.1117/12.2506174

15 November 2018 Research on spectral calibration of the hyperspectral irradiance-meter in near-infrared band (900-1700nm)

Quan Zhang, Xin Li, Wenchao Zhai, Xiaobing Zheng

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Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109644R (2018) https://doi.org/10.1117/12.2506174
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

With regard to the visible and near-infrared hyperspectral irradiance-meter developed by ourselves, the theories and methods of spectral calibration are discussed.The visible and near-infrared hyperspectral irradiance-meter is composed of three optical modules: the visible spectral module(400-1000nm)(VIS), the near-infrared spectral module(900- 1700nm)(NIR), the short-wave-infrared spectral module(1600-2500nm)(SWIR).The detection units use flat-field concave grating to diffract and focus different wavelengths, use the linear array detector to detect signals.For the NIR spectral module(900-1700nm), two spectral calibration methods are adopted: argon lamp calibration and wavelength standard panel calibration.The theories of the two spectral calibration methods are expounded, and the corresponding calibration steps are designed.When the argon lamp or the wavelength standard panel is used in the laboratory to calibrate the NIR spectral module(900-1700nm), the correspondence between the response and the pixel of linear array detector is obtained through diffracting and focusing different wavelengths by the flat-field concave grating. Depending on the characteristic spectrum of the argon lamp or the wavelength standard panel, the spectral calibration equation in the range of 900-1700nm (the NIR spectral module) is derived through data polynomial fitting. The calibration results show that the fitting errors of the two methods are less than 0.45nm and 1 nm respectively, and the spectral calibration uncertainties are better than 0.5nm and 1.2 nm respectively.The two calibration methods verify that the design of the instrument’s spectral module is rational, and provide a meaningful reference for various spectral calibration methods of the near-infrared spectral module.

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Quan Zhang, Xin Li, Wenchao Zhai, and Xiaobing Zheng "Research on spectral calibration of the hyperspectral irradiance-meter in near-infrared band (900-1700nm)", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644R (15 November 2018); https://doi.org/10.1117/12.2506174

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KEYWORDS

Calibration

Spectral calibration

Near infrared

Sensors

Detector arrays

Signal detection

Light sources

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