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为了在降低数字全息显微成像系统成本的同时实现高分辨成像,对像面数字全息显微术的记录与再现过程进行了理论分析,结合系统的点扩散函数,对该系统的横向分辨率进行了分析. 得到了如下结论:像面数字全息显微系统的横向分辨率对电荷耦合器件(CCD)光敏面尺寸变化不敏感;对于常见的CCD 器件,其像元尺寸的变化对该系统的横向分辨率影响甚微. 此外,对像面数字全息显微系统的成像特点进行了分析,结果表明:利用像面数字全息系统可以实现物体信息的完整记录与再现,其成像分辨率及像质优于预放大数字全息系统. 利用搭建的数字全息实验记录系统,从强度及位相两方面对理论分析结果进行了验证,实验结果表明了理论分析的正确性.In order to achieve high-resolution imaging by reducing the cost of digital holographic microscopy system, the recording and reconstruction process of image-plane digital holographic system (IPDHS) and its point spread function are analyzed. Then, the determination factor of lateral resolution of IPDHS is investigated. It is concluded that the dependence of lateral resolution of IPDHS on the photosensitive surface size of the recording device is very weak, which is completely different from the common knowledge that the lateral resolution of digital holographic imaging system can be improved by using large size recording device. Then the imaging characteristics of an IPDHS are analyzed. The results show that the information about the tested object can be completely recorded and reconstructed by image-plane digital holography, and that the lateral resolution of IPDHS is higher than that of pre-magnification digital holography. Two IPDHS with plane and spherical reference wave are built. The experimental results are in accordance with the theoretical analysis.
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Keywords:
- image-plane digital holography /
- lateral resolution /
- point spread function /
- small size CCD
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[2] Das B, Yelleswarapu C S, Rao L N 2012 Appl. Opt. 51 1387
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[11] Li Y, Xiao W, Pan F, Rong L 2013 High Power Laser and Particle Beams 25 1345
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[19] Goodman J W 1996 Introduction to Fourier Optics (2nd Ed.) (New York: McGraw-Hill)
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[1] Hao Y, Asundi A 2011 Appl. Opt. 50 183
[2] Das B, Yelleswarapu C S, Rao L N 2012 Appl. Opt. 51 1387
[3] Hu H F, Wang X L, Guo W G, Zhai H C, Wang P 2011 Acta Phys. Sin. 60 017901 (in Chinese) [胡浩丰, 王晓雷, 郭文刚, 翟宏琛, 王攀 2011 60 017901]
[4] Li J C, Lou Y L, Gui J B, Peng Z J, Song Q H 2013 Acta Phys. Sin. 62 124203 (in Chinese) [李俊昌, 楼宇丽, 桂进赋, 彭祖杰, 宋庆和 2013 62 124203]
[5] Zhang Y Z, Guohai S, Giancarlo P, Wang D Y, Bahram J, Wolfgang O 2013 Opt. Commun. 286 56
[6] Liu C, Liu Z, Bo F 2002 Appl. Phys. Lett. 81 3143
[7] Granero L, Mico V, Zalevsky Z, Garcia J 2009 Opt. Express 17 15008
[8] Granero L, Zzlevsky Z, Mico V 2011 Opt. Lett. 17 1149
[9] Hussain A, Mudassar A A 2012 Opt. Commun. 285 2303
[10] Ochoa N A, Landgrave J E A 2011 Opt. Express 19 23613
[11] Li Y, Xiao W, Pan F, Rong L 2013 High Power Laser and Particle Beams 25 1345
[12] Li Y, Lilley F, Burton D 2010 Appl. Opt. 49 1643
[13] Park Y, Choi W, Yaqoob Z 2009 Opt. Express 17 12285
[14] Mico V, Zalevsky Z, Garcia-Martinez P 2006 Appl. Opt. 45 822
[15] Wang H Y, Wang G J, Zhao J, Xie J J, Wang D Y 2008 Acta Photo. Sin. 37 929 (in Chinese) [王华英, 王广俊, 赵洁, 谢建军, 王大勇 2008 光子学报 37 929]
[16] Wang H Y, Liu F F, Song X F, Liao W, Zhao B Q, Yu M J, Liu Z Q 2013 Acta Phys. Sin. 62 024207 (in Chinese) [王华英, 刘飞飞, 宋修法, 廖薇, 赵宝群, 于梦杰, 刘佐强 2013 62 024207]
[17] Li J C, Fan Z B, Patrice T, Song Q H, Pascal P 2011 Acta Phys. Sin. 60 034204 (in Chinese) [李俊昌, 樊则宾, Patrice T, 宋庆和, Pascal P 2011 60 034204]
[18] Wang H Y, Ma J, Yuan C J 2013 Opt. Commun. 307 50
[19] Goodman J W 1996 Introduction to Fourier Optics (2nd Ed.) (New York: McGraw-Hill)
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