一、概述在红外成像系统中,采用多元串扫可以提高温度分辨率。串扫中的各探测器信号是相关的,经延时后可直接相加。噪声是不相关的,总噪声电压等于各个探测器噪声电压平方和的平方根。因此经时间延时积分(TDI)处理后,n元探测器串扫,信噪比可提高为单元的(?)倍。此外TDI处理还可以降低对多元探测器均匀性的要求,而且当个别探测器或前放失效时系统仍可正常工作。 I. Overview In the infrared imaging system, the use of multiple string scan can improve the temperature resolution. Each detector signal in the sweep is correlated, and can be added directly after the delay. The noise is irrelevant and the total noise voltage is equal to the square root of the square sum of the noise voltages of each detector. Therefore, after time delay integration (TDI) processing, the n-element detector sweeps and the signal-to-noise ratio can be increased to (?) Times of the element. In addition, TDI processing can also reduce the requirement for multiple detector uniformity, and the system can still function properly when individual detectors or pre-release failures.