Study of uncooled thermal imaging system with multiple working temperatures

Junju Zhang; Tian Si; Lianjun Sun; Benkang Chang; Yunsheng Qian; Yafeng Qiu

doi:10.1117/12.758391

23 January 2008 Study of uncooled thermal imaging system with multiple working temperatures

Junju Zhang, Tian Si, Lianjun Sun, Benkang Chang, Yunsheng Qian, Yafeng Qiu

Proceedings Volume 6835, Infrared Materials, Devices, and Applications; 683520 (2008) https://doi.org/10.1117/12.758391
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Reasons that thermal imaging systems consume power have been analyzed, and a low-power design scheme of thermal imaging systems has been presented with multiple working temperature points. Transient response performance of α-si microbolometer detectors is simulated firstly when the working temperature varies in the range from -40°C to +60°C. Simulating results show that α-si microbolometer detectors have coherent response performance in a large range of working temperature, which lay basis for designing uncooled thermal imaging system with multiple working temperatures. Different from traditional thermal imaging systems, this thermal imaging system has three working temperature with an accuracy range of less than ±0.01°C. When working, the temperature control circuit will switch between the working temperatures according to the variety of the environmental temperature. To evaluate this thermal imaging system, we measure its power consumption and NETD in the environmental temperature range from -40°C to +60°C. The measurement results are that the total power is less than 2500mW and the NETD is less than 120mk. This indicates that the thermal imaging system has nearly the same imaging quality and obviously lower power, compared with traditional thermal imaging systems.

Citation Download Citation

Junju Zhang, Tian Si, Lianjun Sun, Benkang Chang, Yunsheng Qian, and Yafeng Qiu "Study of uncooled thermal imaging system with multiple working temperatures", Proc. SPIE 6835, Infrared Materials, Devices, and Applications, 683520 (23 January 2008); https://doi.org/10.1117/12.758391

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