本文介绍了二元光学元件的概况，衍射透镜理论，二元光学元件的制造方法以及发展趋势。
The introduction of binary optical elements, theory of diffractive lenses, fabrication of binary optical elements and trends are related.
介绍了当前光纤组束研究中的几种主流方法，即利用受激布里渊散射的光纤组束；利用衍射光学元件的光纤组束；全光纤组束等。
Several mainstream laser beam combination methods, including stimulated Brillouin scattering, diffraction optics units and all fiber beam combination, are introduced.
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。
Several examples shown in this Paper indicate that it is a valuable design method of the diffraction optical element.
应用推荐