Diffraction-Free Apertures

本文提出的实验和理论研究的目的是 是设计和研究振幅传输孔径， 发射不受衍射扩展影响的光束。 的技术和 提出了无衍射光阑的理论可行性 最近在罗切斯特大学的理论工作中， Eberly教授提出要证明 光斑尺寸小于100微米的光束， 在大约米的路径长度上的波束扩展大于10%。 的 潜力是巨大的短期应用在这些领域， 激光划片、激光微焊接甚至激光手术， 具有不寻常景深的窄聚焦光束是理想的。

The purpose of the experimental and theoretical research proposed here is to design and study amplitude transmission apertures that create and transmit beams not subject to diffraction spreading. The technical and theoretical feasibility of non-diffracting apertures was proposed recently in theoretical work at the University of Rochester by Durnin. Professor Eberly proposes to demonstrate the formation and propagation of optical beams with spot sizes smaller than 100 microns with less than 10% beam spreading over path lengths on the order of meters. The potential is great for near-term applications in such areas as laser-scribing, laser micro-welding and even laser surgery, where narrowly focused beams with unusual depth of field are desirable.