前言 今天，设计一款镜头（光学工程师所谓的光学系统）似乎是一件轻而易举的小事。市面上有数以千计的光学专利，其中不乏一些知名的设计。已经变成公共财产的设计公式更是有好几百种。你可以随便用铅笔画草稿，计算机程序就会以闪电般的速度帮你完成其它部分的修改。 闪电般 Preface Today, designing a lens (the so-called optical system by optical engineers) seems like a trivial matter. There are thousands of optical patents on the market, many of them well-known designs. There are hundreds of design formulas that have become public property. You can draw drafts with your pencils and your computer program will do the rest of the changes with lightning speed. Lightning