It must be pointed out that spacecoherence of beam is highly important for light beam quality evaluation.
此外还指出光束的空间相干性在光束空间质量评价中也应重视。
2
Since coherence is an inclusive semantic notion, it surely leaves vast space for further research in this field.
因为连贯涉及的因素多而复杂，所以在这方面具有广阔的后续研究前景和空间。
3
In the third part, using the principle of coherence, we study the properties of the beam array with radial or azimuthal polarized propagating in the free space.