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无透镜傅里叶变换显微数字全息成像系统的焦深
引用本文:王华英,张志会,廖薇,宋修法,郭中甲,刘飞飞.无透镜傅里叶变换显微数字全息成像系统的焦深[J].物理学报,2012,61(4):44208-044208.
作者姓名:王华英  张志会  廖薇  宋修法  郭中甲  刘飞飞
作者单位:1. 河北工程大学理学院,邯郸,056038
2. 河北工程大学信息与电子工程学院,邯郸,056038
基金项目:国家自然科学基金(批准号:61077001, 61144005), 河北省自然科学基金(批准号:F2009000750和F2010001038) 和河北省科技支撑计划项目(批准号:09277101D)资助的课题.
摘    要:基于透镜相干光学成像系统的斯特列尔(Strehl)判据, 对无透镜傅里叶变换显微数字全息成像系统的焦深进行了推导, 得到了参考点源对称偏置和非对称偏置两种情况下的焦深表达式. 结果表明, 无透镜傅里叶变换显微数字全息成像系统的焦深决定因素与透镜相干成像系统的焦深决定因素不同, 其焦深不仅与照明光源的波长, 成像系统的孔径及记录距离有关, 还与参考光源的配置有关. 计算机模拟和实验结果均证明了理论分析的正确性.

关 键 词:显微数字全息  无透镜傅里叶变换数字全息  焦深
收稿时间:7/3/2011 12:00:00 AM

Focal depth of digital lensless Fourier transform micro-holographic system
Wang Hua-Ying,Zhang Zhi-Hui,Liao Wei,Song Xiu-F,Guo Zhong-Jia and Liu Fei-Fei.Focal depth of digital lensless Fourier transform micro-holographic system[J].Acta Physica Sinica,2012,61(4):44208-044208.
Authors:Wang Hua-Ying  Zhang Zhi-Hui  Liao Wei  Song Xiu-F  Guo Zhong-Jia and Liu Fei-Fei
Institution:College of Science, Hebei University of Engineering, Handan 056038, China;Scholl of Information & Electrical Engineering, Hebei University of Engineering, Handan 056038, China;Scholl of Information & Electrical Engineering, Hebei University of Engineering, Handan 056038, China;College of Science, Hebei University of Engineering, Handan 056038, China;Scholl of Information & Electrical Engineering, Hebei University of Engineering, Handan 056038, China;Scholl of Information & Electrical Engineering, Hebei University of Engineering, Handan 056038, China
Abstract:Based on the Strehl criterion of coherent lens imaging system, the focal depth (FD) of lensless Fourier digital micro-holographic system is deduced. The FD expressions of the holographic systems with symmetrical and unsymmetrical reference point sources are obtained. The results show that the FD of lensless Fourier digital micro-holographic system is dependent not only on the optical wavelength and the numerical aperture of the recording system but also on the offset of the reference optical source, which is different from the FD of lensless Fourier digital micro-holographic system. The validities of the theoretical analysis are demonstrated by the computer simulations and experiments.
Keywords:micro-digital holography  lensless Fourier transform digital holography  focal depth
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