In1943, Carl Zeiss also developed a procedure to measure lens imagequality with so-called “MTF” curves (modulationtransferfunction), which numerous manufacturers today use for quality control.
1943年卡尔蔡司同样研发了一套利用MTF（调制传递函数）
2
The modulationtransferfunction(MTF) is one of the fundamental parameters to evaluate the infrared optical lens.
调制传递函数是评价红外光学镜头性能的最基本的技术指标之一。
3
There are obverse and adverse projection two methods for measure modulationtransferfunction(MTF) of lens.