The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.

由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。

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By using ZEMAX to simulate the diode laser optical path, including beam shaping, collimation, focus, etc., several kinds of spot outputs with various sizes was implemented.

利用ZEMAX光学设计软件模拟半导体激光光路，包括光束整形、准直、聚焦等光束变换方式，实现了多种尺寸的光斑输出。

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