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1. 发明专利

JPS59142507A Focus detection method 失效
标题翻译：聚焦检测方法
公开(公告)号：JPS59142507A
公开(公告)日：1984-08-15
申请号：JP1694083
申请日：1983-02-04
申请人： Hasegawa Teiji , Tokyo Gijutsu Kenkyusho:Kk
发明人： KONDOU TOSHIHIRO
IPC分类号： G03B13/36 , G02B7/34 , G02B7/36
CPC分类号： G02B7/36
摘要： PURPOSE:To obtain a focus detector capable of measuring so long as a prescribed lightness is available, by judging fucusing in accordance with the sum of output change amts. of photodetectors depending upon forward and backward movement of an objective lens. CONSTITUTION:An image is focused on a diffracting element or an optical element with an objective lens, this image is focused on many photodetectors elements 1a-8a with a focusing lens, and outputs V1-V8 are taken out through electrode plates 1b-8b. The front focus and the rear focus are judged in accordance with the positive or negative sum DELTAVt of output change DELTAV1-DELTAV8 of each element 1a-8a due to the forward and backward movements of the objective lens, and focusing can be detected from the time of DELTAVt=0. Since detection of contrast or phase difference or the like is dispensable, the measurement is made possible so long as a prescribed lightness is available.
摘要翻译：目的：通过根据输出变化量的总和判断融合，获得能够测量的焦点检测器，只要指定的亮度可用。取决于物镜的向前和向后运动的光电检测器。构成：图像聚焦在具有物镜的衍射元件或光学元件上，该图像聚焦在具有聚焦透镜的许多光电检测器元件1a-8a上，并且通过电极板1b-8b将输出V1-V8取出。根据物镜的向前和向后移动，根据每个元件1a-8a的输出变化DELTAV1-DELTAV8的正或负和DELTAVt来判断前焦点和后焦点，并且可以从时间检测聚焦的DELTAVt = 0。由于对比度或相位差等的检测是不必要的，只要规定的亮度可用，就可以进行测量。

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