The losses Bessel-Gaussian beams, a kind of non-diffracting beam, propagating through a hard aperture are studied, and a general formula is derived.
对无衍射光束———贝塞尔高斯光束通过硬边光阑时的功率损耗作了研究，给出了普适的损耗公式。
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。
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。
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。
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