斩波器是红外探测系统、激光雷达系统等的重要组成器件，传递函数可以用来描述斩波器的光学传递特性。

Chopper is an important part of infrared detecting system and laser radar; the transfer function is used to characterize the optical transfer characteristics of chopper.

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用计算机模拟和光学传递函数数值计算，分析了采用不同环形透镜及探测器对系统成像特性的影响。

By using computer simulation and numerical computation of OTF, the image property is analyzed for the case of different annular lenses and detector in confocal scanning system.

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