Optimal theoretical study of the pixel structure and spatio-temporal random noise of uncooled IRFPA
投稿时间:2019-06-07  修订日期:2019-12-31  download
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冯涛 北京理工大学光电学院光电成像技术与系统教育部重点实验室北京 100081 tao.feng@139.com 
金伟其 北京理工大学光电学院光电成像技术与系统教育部重点实验室北京 100081 jinwq@bit.edu.cn 
司俊杰 中国空空导弹研究院光电器件研究所  
张海军 北方广微科技有限公司北京 100089  
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 component 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 then the noise is measured. The experimental results show that the uncooled IRFPA spatio-temporal random noise model is effective.
keywords:Uncooled IRFPA, spatio-temporal random noise, 3-D noise model, double-layer structure, microbolometer
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Copyright:《Journal of Infrared And Millimeter Waves》