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 axcion can produce a non-diffracting beam, and it is used to extend depth of field of optical imaging system, and the theorem of this method is analyzed in this paper.
利用轴锥镜能产生无衍射光的特性，分析了将其应用到成像系统中增大景深的原理。
The optical properties, and hydrodynamics characteristics, as well as the key coupling technologies between the non-diffracting beam and the water jet, have been deeply analyzed and researched.
深入研究了水射流导引激光加工系统的光学特性、水光纤的流体力学特性及耦合系统的关键技术。
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。
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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