| 波前编码系统景深延拓性能研究 |
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| 引用本文： | 张荣福,王涛,潘超,王亮亮,庄松林.波前编码系统景深延拓性能研究[J].物理学报,2011,60(11):114204-114204. |
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| 作者姓名： | 张荣福 王涛 潘超 王亮亮 庄松林 |
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| 作者单位： | 1. 上海理工大学光电信息与计算机工程学院 200093,上海;
2. 黄石理工学院电气与电子信息工程学院 435003,黄石 |
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| 基金项目： | 国家重点基础研究发展计划(批准号:2007CB935300)、上海市重点实验室建设项目(批准号:08DZ2272800)和上海市重点学科项目第三期(批准号:S30502)资助的课题. |
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| 摘 要： | 波前编码景深延拓技术是在非相干光学系统的出瞳处加入三次位相板,对成像进行解码处理而获得清晰图像以扩大光学系统景深的技术.文章通过深入研究波前编码光学成像系统的调制传递函数(MTF),分析离焦量和位相板的调制系数对MTF的影响,并通过数值计算和曲线拟合得到位相板调制系数、系统带宽、景深延拓性能之间的关系.该研究成果为位相板的调制系数的选择和景深延拓光学系统的设计提供依据.
关键词：
波前编码
景深延拓
调制传递函数
三次位相板
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| 关 键 词： | 波前编码 景深延拓 调制传递函数 三次位相板 |
| 收稿时间： | 6/9/2010 12:00:00 AM |
Extension characteristics of the depth of field for wavefront coding system |
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| Zhang Rong-Fu,Wang Tao,Pan Chao,Wang Liang-Liang and Zhuang Song-Lin.Extension characteristics of the depth of field for wavefront coding system[J].Acta Physica Sinica,2011,60(11):114204-114204. |
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| Authors: | Zhang Rong-Fu Wang Tao Pan Chao Wang Liang-Liang and Zhuang Song-Lin |
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| Institution: | School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093, China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093, China;School of Electric and Electronic Information Engineering,Huangshi Institute of Technology,Huangshi 435003, China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093, China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093, China |
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| Abstract: | The wavefront coding extension of the depth of field (DOE) for an imaging system is achieved by inserting a third order phase plate into the pupil plane of a spatially incoherent imaging system. The encoded image can be digitally restored to produce a final image with improved depth-dependent details. The characteristics of the system are studied, and the modulation transfer function (MTF) varying with defocus and modulation coefficient,α, of the third order phase mask is analyzed, the results about the effects of α value on the extension of DOE and the bandwidth are obtained. The results are conducible to the design of wavefront coding optical system and the choice of an appropriate α velue. |
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| Keywords: | wavefront coding field depth extending MTF cubic phase mask |
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