然后我们再做微小的调整，到焦点的另一边轻微散焦后，看衍射圈质量是否有明显的提高。

Then I make a micro adjustment and go to the other side of focus and see if it has gotten better or worse for that side.

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然后我们再做微小的调整，到焦点的另一边轻微散焦后，看衍射圈质量是否有明显的提高。

Then I make a micro adjustment and go to the other side of focus and see if it has gotten better or worse for that side. Remember what I said about variables and no free rides?

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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）。

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

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