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设计变焦镜头时,对实现变焦距的凸轮或凹槽曲线的计算,贯串在设计的全过程。同时,在变焦镜头的象差自动平衡程序中,也需要一种通用的公式,对常见的各种形式的变焦镜头,都能计算出曲线上的某些点。本文就是给出这样一种计算方法,用此公式设计计算过电影放映镜头、猎枪描准镜、跑猪镜的变焦曲线,经试制生产均得到满意的结果。文中附有简短而完整的实用程序。变焦镜头的一般形式如下:
When designing a zoom lens, the calculation of the curve of the cam or groove to achieve zooming runs through the entire design process. In the meantime, a common formula is also required in the autofocus process of the aberration lens of the zoom lens, and certain points on the curve can be calculated for the common types of zoom lenses. This article is to give such a calculation method, using this formula to calculate the calculated film projection lens, shotgun sight mirror, running pig mirror zoom curve, the trial production have been satisfactory results. Text with a brief and complete utility. The general form of the zoom lens is as follows: