DESIGN OF AN AUTOMATED FEEDBACK CONTROL COOLING SYSTEM FOR SWIR LINEAR IMAGE SENSOR APPLICATION |
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| Authors: | Chien-Hung Chen Chih-Wen Chen Chun-Fu Lin Tai-Shan Liao Chi-Hung Hwang Shir-Kuan Lin |
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| Affiliation: | 1. Instrument Technology Research Center , National Applied Research Laboratories , Hsinchu, Taiwan, Republic of China cchung@itrc.org.tw;3. Instrument Technology Research Center , National Applied Research Laboratories , Hsinchu, Taiwan, Republic of China;4. Instrument Technology Research Center , National Applied Research Laboratories , Hsinchu, Taiwan, Republic of China;5. Institute of Electrical Control Engineering , National Chiao Tung University , Hsinchu, Taiwan, Republic of China;6. Institute of Electrical Control Engineering , National Chiao Tung University , Hsinchu, Taiwan, Republic of China |
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| Abstract: | Our novel automated feedback temperature controlled cooling system consists of a temperature measurement circuit, a TE cooler, a thermistor, a microcontroller, and a digital-to-analog converter and PWM algorithms. The measurement accuracy of this temperature controlled TE system was better than 0.1°C and can be used for maintaining an instrument's isothermal applications. The experimental results of SWIR linear image shows that the temperature can be stably maintained at ?20°C, the dark output current can be reduced almost 80 mV (Integration time: 100 ms) and the SNR of pixel can be improved from 48 dB to 83 dB as well. |
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| Keywords: | automated feedback PWM SNR SWIR linear image TE cooler temperature control |
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