| 基于光波映射展宽技术的稀疏图像实时获取 |
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| 引用本文： | 温馨,邢芳俭,杨四刚,陈宏伟,陈明华,谢世钟.基于光波映射展宽技术的稀疏图像实时获取[J].光电子．激光,2013(7):1422-1425. |
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| 作者姓名： | 温馨 邢芳俭 杨四刚 陈宏伟 陈明华 谢世钟 |
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| 作者单位： | 清华大学 电子工程系,北京 100084;清华大学 电子工程系,北京 100084;清华大学 电子工程系,北京 100084;清华大学 电子工程系,北京 100084;清华大学 电子工程系,北京 100084;清华大学 电子工程系,北京 100084 |
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| 基金项目： | 国家自然科学基金(60736002,6,61090391)和国家“973”重点基础研究发展计划( 2012CB315703)资助项目 (清华大学 电子工程系,北京 100084) |
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| 摘 要： | 针对传统成像技术的成像速度慢且灵敏度低,本 文采用光波映射展宽技术搭建一个一 维稀疏图像实时获取系统,以实现高速图像的实时获取。基于空间光栅的空-频映射以 及色散光纤的 频-时映射,充分利用傅里叶变换的色散效果,使得系统简化并能够实现实时处理的性能 。从光栅公式入手,对系统的量程和空间分辨率进行了初步分析,并通过系统实验将 上述理论结果 进行验证。实验表明,本文系统能够将一维的条形码以20.9MHz的帧 率在示波器上实时成像,比目前的常用成像技术高4个量级。
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| 关 键 词： | 连续时间编码放大显微技术(STEAM) 空-频映射 频时映射 |
| 收稿时间： | 2012/12/11 0:00:00 |
A real-time sparse imaging system based on the optical mapping and boardening technology |
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| Affiliation: | Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | Traditional imaging technologies can neither capture ultrafast processes nor get high sensitivity in their imaging processes.This paper aims to build an ultrafast one-dimensional real-time imaging system which is based on the optical mapping and boardening technology.By the use of optical im age amplification,we realize the system with both ultrafast continuous real-time imaging and high s ensitivity.This system makes full use of the dispersive Fourier transform in order to simplify the construction of the system and realize the real-time image processing,while the system is base d on the space-frequency mapping of the spatial grating and the frequency-time mapping of the dispersive fiber.Besides,this paper discuss es not only the system measuring range but also the spatial resolution from both the grating formula and the feat ures of the gratings and other components of the system.We get some ideal experiment al results to verify the system performance.As a result,we get real-time imaging at a frame rate of 20. 9MHz,which is 4orders of magnitude higher than that of the traditional imaging system.Our system measuring range is about 7.0mm,while the spatial resolution can reach as low as 280. |
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| Keywords: | serial time-encoding amplified microscope (STEAM) space-frequency mapping fr equency-time mapping |
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