可见光电视摄像机整机MTF测量装置及方法

调制传递函数（MTF）是评价电视摄像机成像质量的重要参数。介绍了一种用于可见光电视摄像机整机MTF测量装置及方法。设计了三积分球目标发生器系统，通过电动衰减器实现了目标和背景亮度的独立可控,其出口不均匀性为4.1%。采用基于倾斜狭缝法的亚像元自动插值与匹配算法以及线扩散函数（LSF）的最小二乘拟合分析法，实现了倾斜角度的自动计算以及MTF的精确测量，测量装置的重复性为0.007。通过与国外先进仪器的比对实验，表明建立的电视摄像机整机性能测量装置可以有效解决电视摄像机整机成像质量性能评价问题。

Measurement device and method of MTF for visible TV camera

Modulation transfer function(MTF)is an important parameter to evaluate the imaging performance of TV cameras.A measuring device and method for MTF of visible TV camera were introduced.A threeintegral spherical target generator system was designed,the target and background brightness can be independently controlled by electric attenuators.The outlet non-uniformity is 4.1%.An automatic sub-pixel interpolation algorithm based on sliting slit method and a least square method of line spread functions were wtilized to realize the angle calculation automaticly and MTF measurement accurately.The repeatability of the measuring device is 0.007,and the measurement uncertainty is U=0.05(k=2).Finally,the comparison experiment with foreign advanced instruments shows that,the measurement device established can effectively solve the problem of evaluating the image quality of TV cameras.