Focal depth of laser beam is advanced by diffraction optical element in this paper.
本文使用衍射光学元件来提高激光束的焦深。
Several examples shown in this Paper indicate that it is a valuable design method of the diffraction optical element.
文中给出了几个实例，充分表明这是有实用价值的一种衍射光学元件设计方法。
The relief structure of diffraction optical element can be written precisely but very slowly with the raster scan mode bye-beam.
用电子束逐行扫描方法刻蚀衍射光学元件的浮雕结构精度高而速度低。
The surfaces of diffraction optical element (DOE) are often deep and discontinuous, which lead to some difficulties for measurement of the 3-d surface topography of DOE.
衍射光学元件(DOE)表面形貌的测量需要解决因表面结构深度较大和表面不连续给测量带来的困难。
The surfaces of diffraction optical element (DOE) are often deep and discontinuous, which lead to some difficulties for measurement of the 3-d surface topography of DOE.
衍射光学元件(DOE)表面形貌的测量需要解决因表面结构深度较大和表面不连续给测量带来的困难。
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