NDLI: Acquisition and processing of three-dimensional information based on digital holography with pre-magnification

Content Provider	IEEE Xplore Digital Library
Author	Huaying Wang Liang Baoshe Han Rui Zhao Baoqun
Copyright Year	2008
Description	Author affiliation: Hebei Univ. of Eng., Handan (Huaying Wang; Liang Baoshe)
Abstract	According to the point-spread function of off-axis Fresnel digital holographic system with pre-magnification, the wave front deformation introduced by microscope objective is obtained. Using a collimated light as reconstructing wave, the phase aberration introduced by the difference between the reconstructing wave and the reference recording wave is analyzed by using a very simple method, which is very different from that one proposed by T. Colomb et al. Then the phase mask is obtained. It must be pointed out that for Fresnel digital holography, the recording distance must be determined accurately before compensating automatically the phase aberration. This is done by an automatic focusing procedure, which is based on image-gray-entropy-method. A special three-dimensional micro object is simulated, which is polluted by a random noise. The percentage error of the recording distance obtained by the focusing procedure is below 0.6 for SNR = 25. Then the accurate phase image is obtained by applying the automatic aberration compensation procedure. The simulation results show that for a hologram with high signal-noise-ratio, the above method is very effective; but for a very strong noisy hologram the procedure fails at all. Moreover, after applying a median filter to the primary reconstructed phase image, the aberration of the phase image obtained by further iteration decreases, at the same time the noise is strengthen. Therefore, the key of digital holography is the recording of high quality hologram.
Starting Page	690
Ending Page	694
File Size	1070157
Page Count	5
File Format	PDF
ISBN	9787900719706
DOI	10.1109/CHICC.2008.4605331
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute Of Intelligence M&C Technical Of KMUST
Subject Keyword	automatic phase compensation Automatic focusing Digital holography with-premagnification Microscopy Optimized production technology Focusing Microscopic imaging Information processing Holography Distance measurement Electronic mail Image reconstruction
Content Type	Text
Resource Type	Article

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