| 一种优化波前编码系统相位板参数的新方法 |
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| 引用本文： | 范志刚,付强,陈守谦,吕天宇.一种优化波前编码系统相位板参数的新方法[J].应用光学,2011,32(1). |
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| 作者姓名： | 范志刚 付强 陈守谦 吕天宇 |
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| 作者单位： | 哈尔滨工业大学,空间光学工程研究中心,黑龙江,哈尔滨,150001 |
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| 摘 要： | 根据波前编码系统的设计理论,在兼顾图像恢复能力的基础上,提出利用不同离焦距离的点扩散函数与焦面处的点扩散函数之间的希尔伯特空间角作为成像特性一致性的评价函数,结合遗传算法,对扩大景深的波前编码成像系统的相位板参数进行优化。分别在空间域和频率域上分析应用波前编码技术前后光学系统的成像特性,并利用最小二乘数字滤波器对中间模糊图像进行复原。仿真实验结果表明:在三次相位板上应用此方法获得的最佳相位板参数使波前编码系统焦深扩展了10倍。
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| 关 键 词： | 波前编码 相位板参数优化 希尔伯特空间角 点扩散函数 |
New method for pupil phase mask optimization in wavefront coding system |
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| FAN Zhi-gang,FU Qiang,CHEN Shou-qian,LU Tian-yu.New method for pupil phase mask optimization in wavefront coding system[J].Journal of Applied Optics,2011,32(1). |
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| Authors: | FAN Zhi-gang FU Qiang CHEN Shou-qian LU Tian-yu |
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| Institution: | FAN Zhi-gang,FU Qiang,CHEN Shou-qian,LU Tian-yu(Harbin Institute of Technology,Research Center for Space Optical Engineering,Harbin 150001,China) |
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| Abstract: | According to the design theory of wavefront coding,taking the imaging restorability into consideration,we used the angle in Hilbert space between in-focus PSF and several defocus PSFs as an evaluation for making the shape and intensity of point spread function(PSF) insensitive with defocus over a wide range of defocus parameter values.The angle in Hilbert space is capable of evaluating similarity of the PSFs of different defocus parameter values and was used to optimize the design of phase mask in real wave... |
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| Keywords: | wavefront coding parameter optimization phase mask angle in Hilbert space point spread function |
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