平滑的
光学
空间频率
带通滤波器
空间滤波器
带宽(计算)
材料科学
通带
梁(结构)
光学滤波器
计算机科学
物理
电信
计算机视觉
作者
Zhaoming Luo,Shuangchun Wen,Zhixiang Tang,Hailu Luo,Yuanjiang Xiang,Dongmo Song
标识
DOI:10.1016/j.optcom.2010.02.047
摘要
A new application of rugate structures is proposed as low-pass spatial filters for beam smoothing. By using the transfer matrix method to analyze the spatial properties of the bandgap of rugate structures, the low-pass rugate spatial filters with both an almost ideal flat bandpass and a rather steep switching between pass- and stop-bands are designed. The angle-domain bandwidth of the spatial filters can be adjusted by changing the parameters of rugate structures for a given light frequency. The near-field simulations carried out by using the finite-difference time-domain technique confirm the possibility of an efficient light smoothing.
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