Optimal theoretical study of the pixel structure and spatio-temporal random noise of uncooled IRFPA
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Affiliation:

1.School of Optoelectronics, Beijing Institute of Technology, Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of China, Beijing 100081, China;2.China Airborne Missile AcademyHenan Luoyang 471009,China;3.North Guangwei Technology IncBeijing 100089,China

Clc Number:

TN215

Fund Project:

Key projects of the National Natural Science Foundation of China 61231014;Doctoral Fund priority development project of Ministry of Education of China 20131101130002Supported by Key projects of the National Natural Science Foundation of China (No. 61231014); Doctoral Fund priority development project of Ministry of Education of China(No. 20131101130002).

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    Abstract:

    The development of uncooled IRFPA pixel structure from a single-layer structure to a double-layer structure reduces noise and improves performance. The pixel structure and its main physical parameters are introduced. It is noted that the main difference between the double-layer structure and the single-layer structure lies in the difference in the effective area of the pixel and thermal conductivity of the bridge leg. The 3-D noise model is an effective method to analyze IRFPA noise, in which spatio-temporal random noise is the main noise part of uncooled IRFPA. The mechanism of spatio-temporal random noise in uncooled IRFPA is analyzed, and a spatio-temporal random noise model is established. The relationship between spatio-temporal random noise, the effective area of the pixel, the thermal conductivity of the leg is obtained. An uncooled IRFPA with a single-layer pixel structure is improved by changing it into a double-layer pixel structure, and the noise is measured. The measured data proved the effectiveness of the uncooled IRFPA spatio-temporal random noise model.

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FENG Tao, JIN Wei-Qi, SI Jun-Jie, ZHANG Hai-Jun. Optimal theoretical study of the pixel structure and spatio-temporal random noise of uncooled IRFPA[J]. Journal of Infrared and Millimeter Waves,2020,39(2):142~148

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History
  • Received:June 07,2019
  • Revised:April 02,2020
  • Adopted:October 24,2019
  • Online: April 01,2020
  • Published: