non-diffracting beam 无衍射光束
non-diffracting grating 无衍射光栅
non-diffracting spot 无衍射光斑
non-diffracting imaging 无衍射成像
non-diffracting Bessel beams 无衍射Bessel光
A method of spatial straightness measurement by means of non diffracting beam and moire fringe is proposed.
提出用无衍射光和莫尔条纹进行空间直线度测量的技术。
The non diffracting beam is used as the measuring beam and a virtual detector is used to expand detector size.
该系统用无衍射光作测量光束，用虚拟探测器扩展探测器尺寸。
In this system, the dual non diffracting beams are used as incident beams. The system structure is simple and flexible.
系统以双无衍射光束作为测量光束，结构简单灵活。
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