Temperature Control System of Semiconductor Device and Application for Infrared Gas Detection

Wan-hong, 闫万红 Yan; Yan-wen, 周言文 Zhou; Di, 余 迪 Yu; Zhi-wei, 刘志伟 Liu; Fang, 宋芳 Song; Chuantao, 郑传涛 Zheng; Yiding, 王一丁 Wang

doi:10.3788/gzxb20194803.0312002

Cited by 3 publications

(1 citation statement)

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“…Cameras operate with deep cooling of the CCD to reduce dark-current noise [9]. The cooling of the CCD generally occurs through TE cooling [10], such as in the An-dor_iKON_L_936 camera used in this paper, which employs a five-stage TE cooler. The TE cooler functions through the thermoelectric effect of the semiconductor, which, at the front end of the cooler, produces a low temperature, and at the back end, a high temperature.…”

Section: Internal Influencesmentioning

confidence: 99%

Research on the Effect of Vibrational Micro-Displacement of an Astronomical Camera on Detector Imaging

Liu,

Guan,

Wang

et al. 2024

Sensors

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Scientific-grade cameras are frequently employed in industries such as spectral imaging technology, aircraft, medical detection, and astronomy, and are characterized by high precision, high quality, fast speed, and high sensitivity. Especially in the field of astronomy, obtaining information about faint light often requires long exposure with high-resolution cameras, which means that any external factors can cause the camera to become unstable and result in increased errors in the detection results. This paper aims to investigate the effect of displacement introduced by various vibration factors on the imaging of an astronomical camera during long exposure. The sources of vibration are divided into external vibration and internal vibration. External vibration mainly includes environmental vibration and resonance effects, while internal vibration mainly refers to the vibration caused by the force generated by the refrigeration module inside the camera during the working process of the camera. The cooling module is divided into water-cooled and air-cooled modes. Through the displacement and vibration experiments conducted on the camera, it is proven that the air-cooled mode will cause the camera to produce greater displacement changes relative to the water-cooled mode, leading to blurring of the imaging results and lowering the accuracy of astronomical detection. This paper compares the effects of displacement produced by two methods, fan cooling and water-circulation cooling, and proposes improvements to minimize the displacement variations in the camera and improve the imaging quality. This study provides a reference basis for the design of astronomical detection instruments and for determining the vibration source of cameras, which helps to promote the further development of astronomical detection.

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Section: Internal Influencesmentioning

confidence: 99%

Research on the Effect of Vibrational Micro-Displacement of an Astronomical Camera on Detector Imaging

Liu,

Guan,

Wang

et al. 2024

Sensors

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Research on laser water vapor concentration detection technology in the air-sea flux observation

Zhang

Zheng²,

Chen

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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In the observation of water vapor flux at air-sea interface, the collection frequency of water vapor concentration is more than 10 Hz. High-speed and high-precision measurement of water vapor concentration is an urgent problem to be solved in the observation of water vapor flux at air-sea interface. The ratio of the peak-peak value of second harmonic to the average value of first harmonic is used to measure water vapor concentration based on tunable diode laser absorption spectroscopy. The sensitivity of laser water vapor concentration detection equipment caused by marine salt fog and dust is reduced through precise optical design, and the water vapor concentration at the air-sea interface is calculated using a binary polynomial fitting algorithm. The response frequency of the laser water vapor concentration analyzer is 40 Hz. The water vapor concentration values from the laser water vapor concentration analyzer and LI-7500 CO2/H2O gas analyzer are collected synchronously in real time using LabVIEW software. The comparison results show that they have good consistency in the trend and response speed of water vapor concentration, and the measurement deviation of water vapor concentration is within ±1%. The experimental results show that it can meet the needs of high-speed, high-precision measurement of water vapor concentration in the air-sea interface water vapor flux observation.

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低温环境非色散红外气体检测仪温控系统

BO Tengfei,

LI Yafei,

LI Baolin

et al. 2023

光子学报

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Temperature Control System of Semiconductor Device and Application for Infrared Gas Detection

Cited by 3 publications

References 0 publications

Research on the Effect of Vibrational Micro-Displacement of an Astronomical Camera on Detector Imaging

Research on the Effect of Vibrational Micro-Displacement of an Astronomical Camera on Detector Imaging

Research on laser water vapor concentration detection technology in the air-sea flux observation

低温环境非色散红外气体检测仪温控系统

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