所述反射器的出光口的周向设有截光板。
An intercepting panel is arranged on the circumference of the light outlet of the reflector.
飘波的出现会导致用三角法测量板形时出现误差，而新型截光法板形仪可减轻或消除此误差。
The occurrence of the flying wave can lead to the error in shape control by shape meter using laser triangle method, but the error can be decreased or eliminated by laser capture method.
这种光自身的快照看起来像一个螺丝钉的螺纹，或是一截意大利螺旋粉。
A snapshot of the beam itself would look like the threads of a screw, or a bit of fusilli pasta.
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