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本文简单介绍调制传递函数MTF(正弦波振幅响应)的基本概念,以及与对比传递函数CTF(方波响应)之间的关系和转换公式:着重介绍MTF的简化近似法,并推出若干简便实用公式;然后对荷兰菲利浦公司的近10种摄象管(Newvicon,Vidicon Si Vidicon(进行具体分析,为方波响应曲线建立了数学近似式,其近似值与实际曲线符合良好,从而导出了用MTF参数或400电视行时的调制度估算极限分辨力的简便公式和方法,列出了数据表,可供测试与分析时参考。
This paper briefly introduces the basic concepts of MTF (sine wave amplitude response) and its relationship with the transfer function CTF (square wave response): Emphasis on the simplified approximation of MTF, and introduces a number of simple and practical formula ; Then the Netherlands, Philips nearly 10 kinds of video tube (Newvicon, Vidicon Si Vidicon (for a specific analysis of the square wave response curve to establish a mathematical approximation, the approximate value of the actual curve in good agreement, which led to the use of MTF Parameters or modulation of 400 TV line resolution limit resolution of the simple formula and method lists the datasheet for reference when testing and analysis.