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Proceedings Paper

Micro-structure imaging and measurement based on digital holographic system
Author(s): Huaying Wang; Aili Qin; Baoqun Zhao
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Paper Abstract

Based on the phase reconstruction method which is combined digital holography (DH) with digital lateral shearing interferometry (LSI) and the idea of the automatic aberration compensation (AAC), a method to eliminate the linear term of the sheared phase map is proposed. The procedures for reconstruction phase image using the LSI-DH method have been analyzed in detail, which indicates that one-dimensional phase unwrapping must be applied to the original phase map before lateral shearing. Moreover, the condition to obtain correct phase image is that the phase difference between the two adjacent pixels of the shearogram map is less than 2π. One of the prominent advantages of this method is that when the small amount of shearing is applied the two-dimensional phase unwrapping can be avoided. The computer simulations, which are based on the lensless Fourier transform holographic system, demonstrate the validity of the proposed method. It also indicates that the method has large tolerance to noise.

Paper Details

Date Published: 25 November 2009
PDF: 6 pages
Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, 75131Y (25 November 2009); doi: 10.1117/12.838004
Show Author Affiliations
Huaying Wang, Hebei Univ. of Engineering (China)
Aili Qin, Hebei Univ. of Engineering (China)
Baoqun Zhao, Hebei Univ. of Engineering (China)


Published in SPIE Proceedings Vol. 7513:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology

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