Mr. Zhinan Zhang Profile

Zhinan Zhang

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Proceedings Article | 4 April 2023 Paper

Development status of low temperature infrared detection technology

Shanliang Ke, Bingliang Hu, Zhaohui Zhang, Zhinan Zhang, Lijun Sun

Proceedings Volume 12617, 1261729 (2023) https://doi.org/10.1117/12.2664844

KEYWORDS: Infrared radiation, Infrared imaging, Infrared detection, Infrared spectroscopy, Spectroscopy, Thermography, Aerospace engineering, Infrared detectors, Cryogenics, Infrared telescopes

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Infrared detection technology is getting more and more attention, with the rapid development of infrared remote sensing application. Among them, low temperature infrared spectroscopy detection technology is an important development direction in the future. Infrared detection technology is a kind of target detection technology, using the infrared radiation characteristics of substances to different wavelengths. Infrared spectrometer is an important instrument to realize infrared detection technology. This type of spectrometer has been popularized and applied. The imaging spectrometer can reflect the spatial information and spectral characteristics of the observation target. With the improvement of spectral imaging resolution, the signal-to-noise ratio of imaging system is required to increase, which is the technical difficulty of low-temperature infrared spectroscopy. At present, noise reduction through low temperature is the main method. Therefore, infrared detection technology to work in a lower temperature direction. Furthermore, it promotes the progress of low temperature infrared spectroscopy technology. This paper summarizes and compares the development status of low temperature infrared spectrum detection technology. Thus, the key technology of low temperature detection spectrum is extracted. The low temperature infrared detection technology is classified according to the development status of low temperature infrared optics, low temperature support technology and low temperature refrigeration technology. Summarize the shortcomings of domestic existing technology and look forward to the future development direction.

Proceedings Article | 15 February 2019 Paper

Analysis and experiment of synchronized calibration of doppler asymmetric spatial heterodyne spectroscopy (DASH)

Di Fu, Zhinan Zhang, Zhaohui Zhang, Peng Yan, Juan Li, Yafei Zhang, Yutao Feng

Proceedings Volume 11052, 1105216 (2019) https://doi.org/10.1117/12.2522002

KEYWORDS: Calibration, Wind measurement, Interferometers, Doppler effect, Thermal effects, Heterodyning, Spectroscopy, Distortion, Lamps, Temperature metrology

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Doppler asymmetric spatial heterodyne spectroscopy (DASH) with its high stability and feasibility of synchronized calibration highly suit for the wind field observation. By applying the synchronized calibration, the thermal phase distortion of observation emission line could be corrected greatly based on the similarity of thermal effects between observation emission line and calibration line. While, the correction residual which could be called relative thermal phase distortion still influence the wind measurement precision significantly. In this manuscript, we discuss and analyze the relative phase distortion of DASH theoretically and practically based on the DASH retrieval theory and the experiment. Firstly, based on the retrieve theory of DASH, we analyze the relationship between the relative phase distortion and the precision of the wind measurement. It is found that 1.528mrad phase error equal to 1m/s wind measurement error for the DASH developed by our research group. Secondly, based on the DASH developed by our research group, laser of 632.8nm and Ne lamp are employed as input source to test relationship between relative phase distortion and internal temperature of interferometer. According to the experiment result, the relative phase distortion change weekly with the variation of temperature between 25.14°C and 25.67°C. While, the relative phase stability decrease rapidly in other else temperature range. Lastly, according to the experiment result, we analyze the major source of relative phase distortion which could make contribution to reducing the relative phase error, which could increase the wind measurement precision, in the future research.

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