斩波模式红外电视信号传递函数研究  

A Study of Signal Transfer Function of Chopping Mode Infrared TV

作　　者：黄植红[1] 毛振海[1] 李晓斌 

机构地区：[1]华中理工大学电子设备厂

出　　处：《华中理工大学学报》1998年第3期86-88,共3页Journal of Huazhong University of Science and Technology

摘　　要：推导出在计入相位滞后时，斩波模式红外电视信号传递函数的表达式．讨论读出时间对斩波模式运行特性的影响．为了获得最佳的信号传递函数，读出相角应选定在６０°～７０°范围内，这能提高高空间频率时的调制度．Taking into consideration, the expression for the signal transfer function of chopping mode infrared TV is derived. The effect of readout time on the operating characteristic of chopping mode is discussed. In order to obtain the best signal transfer function, a range of 60 ℃～70 ℃ of the readout phase angle should be selected. In this case, the modulation depth at high spatial frequency would be improved.

关 键 词：热释电摄像管 斩波模式 信号传递函数 红外电视 

分 类 号：TN216[电子电信—物理电子学]