提出了一种测量被动成像系统光学散焦的新方法。
A new method to measure the optical defocus of a passive imaging system (ODPIS) is proposed.
为了获得一种对称压缩圆光束的方法，系统研究了三维自散焦介质中亮暗光束对的共同传输。
To contract the circular beam symmetrically, the co-propagation of the bright and dark beams in three-dimensional self-defocusing media is studied systematically.
各向同性非线性材料的重要应用包括自聚焦和散焦现象、开关系统等。
Important applications of isotropic nonlinear materials are seen in self-focusing, defocusing phenomena, switching systems, etc.
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