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首页> 外文期刊>Optical engineering >Extended depth-of-field imaging through radially symmetrical conjugate phase masks
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Extended depth-of-field imaging through radially symmetrical conjugate phase masks

机译：通过径向对称的共轭相位掩模扩展景深成像

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摘要

We proposed a radially symmetrical conjugate phase mask (PM) pair to yield an invariant imaging property for extending depth-of-field imaging. This conjugate PM pair is a two-radially symmetrical phase function with opposite orientation of the phase modulation. Compared with a single-radialiy symmetrical PM, the proposed conjugate PM pair shows a symmetrically imaging property on both sides of the focal plane and high magnitude of modulation transfer function (MTF). The quartic phase mask (QPM) with optimized phase parameters is employed to demonstrate our concept. Several evaluation approaches, including point-spread function, MTF, and image simulation, are used to realize the performance comparison among a traditional imaging system, an original QPM system, and a conjugate QPM. The results are proof that the proposed conjugate PM has a superior performance in extending depth of field imaging.
机译：我们提出了一个径向对称的共轭相位掩模（PM）对，以产生用于扩展景深成像的不变成像特性。此共轭PM对是具有相反相位调制方向的两个径向对称的相位函数。与单半径对称PM相比，所提出的共轭PM对在焦平面的两侧均具有对称的成像特性，并且调制传递函数（MTF）的幅度较高。采用具有优化相位参数的四次相位掩模（QPM）来演示我们的概念。几种评估方法，包括点扩展功能，MTF和图像模拟，用于实现传统成像系统，原始QPM系统和共轭QPM之间的性能比较。结果证明所提出的共轭PM在扩展景深成像方面具有优异的性能。

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  • 来源
    《Optical engineering》 |2015年第11期|251-251|共1页
  • 作者

    Shouqian Chen; Van Nhu Le; Zhigang Fan; Hong Cam Tran;

  • 作者单位

    Harbin Institute of Technology, Research Center of Space Optics Engineering, Heilongjiang, Harbin 150001, China;

    Harbin Institute of Technology, Research Center of Space Optics Engineering, Heilongjiang, Harbin 150001, China;

    Harbin Institute of Technology, Research Center of Space Optics Engineering, Heilongjiang, Harbin 150001, China;

    Nanjing University of Science and Technology, School of Electronic and Optical Engineering, Nanjing 210094, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    computational imaging; phase mask; point-spread function;

    机译：计算成像;相位掩模点扩散功能;

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