Phase compensation in lensless Fourier transform digital holography

ZHANG Zhong-heng; LI Chong-guang; LI Jing-zhe; MIAO Zheng-xiang; LIU Ying

doi:10.7510/jgjs.issn.1001-3806.2013.05.008

The phase accuracy of numerically reconstructed images directly affects the result of the digital holographic measurement. How to find the phase distortion and adopt corresponding method to automatically correct the distortion is challenging. The phase correction problem of lensless Fourier transform digital holographic was analyzed. When reconstruct the numerical wave surface by means of single Fourier transform, there is an additional quadratic phase factor inducing the phase distortion of reconstructed images. The digital phase mask was calculated based on multiple-profile calculation by means of the least square method for curve fitting, the phase distribution was corrected. The theoretical analysis and experimental prove that it is better to correct phase distortion compared with frequently-used two-profile method, the result is helpful for the study of phase correction.

Phase compensation in lensless Fourier transform digital holography

Corresponding author: LI Chong-guang, licg66@yahoo.com.cn;

1. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China;

2. Political College, Southwest Jiaotong University, Chengdu 611756, China;

3. 77296 Unit, Chinese People's Liberation Army, Kunming 650500, China

Received Date: 2012-12-26

Accepted Date: 2013-02-02

Available Online: 2013-09-25

Abstract: The phase accuracy of numerically reconstructed images directly affects the result of the digital holographic measurement. How to find the phase distortion and adopt corresponding method to automatically correct the distortion is challenging. The phase correction problem of lensless Fourier transform digital holographic was analyzed. When reconstruct the numerical wave surface by means of single Fourier transform, there is an additional quadratic phase factor inducing the phase distortion of reconstructed images. The digital phase mask was calculated based on multiple-profile calculation by means of the least square method for curve fitting, the phase distribution was corrected. The theoretical analysis and experimental prove that it is better to correct phase distortion compared with frequently-used two-profile method, the result is helpful for the study of phase correction.

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Reference (12)

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Phase compensation in lensless Fourier transform digital holography

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