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 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.
最后，在光学设计软件Zemax中设计了利用文中几种相位模板的大景深光学成像系统。
Finally, we designed several EDOF imaging systems employing the phase plates mentioned in this paper in the optical design software Zemax.
最后，在光学设计软件Zemax中设计了利用文中几种相位模板的大景深光学成像系统。
Finally, we designed several EDOF imaging systems employing the phase plates mentioned in this paper in the optical design software Zemax.
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