基于Matlab的相位片调控焦点峰值演化特性计算模拟  

Focal Characteristics Evolution Simulation Controlled by Phase Plate based on Matlab

作　　者：刘莉[1] 高秀敏[2] 

机构地区：[1]浙江理工大学计算机技术教学研究部,杭州310018 [2]杭州电子科技大学电子信息学院,杭州310018

出　　处：《科技通报》2010年第2期223-227,共5页Bulletin of Science and Technology

基　　金：国家自然科学基金资助项目(60708002)

摘　　要：基于Matlab软件模拟了分区相位片对光强演化的影响。系统研究表明:分区相位片可以引起焦点破裂,并可以产生光强局域极小值;通过改变环形区域的半径尺寸,光轴方向光强会随相位片中心圆形区域半径变化而变化,出现大焦深、双峰形焦点和三峰形焦点;内圆环形区域相位变化也会对光轴方向光强分布有显著影响,从单峰焦点演化为一些奇特的形状。焦点演化规律研究有利于聚焦光学系统中相位片的设计和使用,并显示出Matlab软件在光学研究中具有广泛的应用前景。Focal characteristics evolution simulation controlled by phase plate is simulated by means of Matlab software. Results show that the proposed piecewise pure phase plate may induce focal splitting and local minimization of light intensity. By adjusting the outer radius of inner annular portion, axial intensity evolves with increasing radius of the center circle portion. High focal depth, two-peak focus, three-peak focus may occur. Phase of inner annular portion may also alter the axial intensity distribution considerably, from original one-peak focus to some novel focal patterns. Evolution principle may pave the way for design and use of the phase plate for using in focusing optical systems, and Matlab owns promising application in optics research.

关 键 词：MATLAB 计算机模拟 相位片 焦点偏移 焦点破裂 光陷阱 

分 类 号：TE82[石油与天然气工程—油气储运工程]