Ms. Si-ting Zhai Profile

Si-ting Zhai

at Beijing Zhenxing Institute of Metrology and Measurement

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Publications (2)

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Proceedings Article | 18 March 2021 Paper

Research on calibration technology of large-area array high-resolution optical load spectral response

Si-ting Zhai, Jia-peng Wang, Hong-sheng Sun, Xin Zhang

Proceedings Volume 11780, 117801L (2021) https://doi.org/10.1117/12.2590728

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Aiming at the key parameter measurement bottlenecks and urgent needs of high-resolution optical loads such as satellite panchromatic multi-spectral cameras, full-spectrum multi-modal imaging spectrometers, and high-resolution imaging spectrometers, a set of wide-spectrum super-large area array optical loads is designed The device was calibrated for key parameters of absolute spectral responsivity, and the measurement uncertainty of the device was evaluated. This device is mainly composed of a broad spectrum light source, monochromator, optical system, standard radiometer, two-dimensional control translation stage, scanning control system, data acquisition and integrated control system. The measurement range is a wide spectral band, 0.4μm～1.6μm, the measurement resolution can reach 10k×10k, and the measurement uncertainty of absolute spectral radiance responsivity is 3% (k=2) [radiance range: 0.1W/(sr∙m²)～10W/(sr∙ m²)]. Establish a set of absolute spectral responsivity calibration device for wide-spectrum super-large area array optical load to solve the technical problem that the key parameters of wide-spectrum high-resolution optical cameras cannot be calibrated in the process of development, debugging, scientific research and production, and provide high-resolution earth observation for my country Provide services for quantitative needs in engineering, military reconnaissance, marine monitoring, and meteorological monitoring.

Proceedings Article | 18 December 2019 Paper

Study on stray radiation suppression of vacuum cryogenic infrared radiation measurement system

Si-ting Zhai, Hong-sheng Sun, Jia-peng Wang, Yu-guo Zhang, Dan Zhao

Proceedings Volume 11334, 113340Z (2019) https://doi.org/10.1117/12.2547306

KEYWORDS: Sensors, Signal detection, Target detection, Infrared radiation, Scattering, Cryogenics, Infrared sensors

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In this paper, the method of stray radiation suppression in infrared radiation measurement in vacuum and cryogenic environment is introduced. The stray radiation suppression structure of a vacuum cryogenic infrared radiation measurement system is designed, and the stray radiation received by the detector of the system is simulated and analyzed. The vacuum cryogenic infrared radiation measurement system is mainly composed of blackbody radiation source, cryogenic optical system, medium wave(3μm~5μm)/long wave(8μm~12μm) detector, signal processing system and stray radiation suppression system. First, the hood retaining ring is designed. according to the system design requirements and structure, the cylindrical blocking ring of the cylindrical mask is designed. Secondly, the number of stray lights entering the system with or without the blocking ring is simulated and analyzed. The stray radiation of the key components in the system is analyzed, and the signal-to-clutter ratio of the target radiation to the stray radiation received by the detector at different ambient temperatures is analyzed. The simulation results of stray radiation received by medium-wave and longwave infrared detectors at different ambient temperatures are given respectively.

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