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Authors: Dingfu Chen 1 ; Anand Asundi 2 ; Liansheng Sui 3 ; Chongtian Huang 2 ; Chi Wang 4 and Yingjie Yu 4

Affiliations: 1 Lab of Applied Optics and Metrology, Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China, Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore and Singapore ; 2 Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore, School of Computer Science and Engineering, Xi’an University of Technology, Xi’an, China ; 3 Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore, d’Optron Pte Ltd, Singapore, Singapore ; 4 Lab of Applied Optics and Metrology, Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China

ISBN: 978-989-758-364-3

Keyword(s): Transport of Intensity Equation, Transmission, Defocus Distance, Focus Plane, Magnification, High Order of Intensity Derivatives.

Abstract: There are many factors in the calculations of Transport of Intensity Equation, which may lead to the uncertainty of the retrieved phase. In this paper, effect of these parameters such as defocus distance, focus plane and magnification, on the results is studied. It is hoped that this would provide a more robust and reliable method for phase and optical height measurement. Furthermore, the effect of intensity derivatives calculated using two defocussed images as opposed to multiple images is also considered. A microlens array is chosen as the test sample in a commercial transmissive Transport of Intensity Equation system. From this study, it is concluded that the biggest factor influencing the result is the magnification, which is seen to provided totally different phase value for the same shape. Incorrect defocus distance or in-focus plane also lead to inaccurate reconstruction results while higher order differential provides better and more stable results than traditional two image d ifferential. (More)

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Paper citation in several formats:
Chen, D.; Asundi, A.; Sui, L.; Huang, C.; Wang, C. and Yu, Y. (2019). Advances in Phase Retrieval by Transport of Intensity Equation.In Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-364-3, pages 168-173. DOI: 10.5220/0007374701680173

@conference{photoptics19,
author={Dingfu Chen. and Anand Asundi. and Liansheng Sui. and Chongtian Huang. and Chi Wang. and Yingjie Yu.},
title={Advances in Phase Retrieval by Transport of Intensity Equation},
booktitle={Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2019},
pages={168-173},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007374701680173},
isbn={978-989-758-364-3},
}

TY - CONF

JO - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Advances in Phase Retrieval by Transport of Intensity Equation
SN - 978-989-758-364-3
AU - Chen, D.
AU - Asundi, A.
AU - Sui, L.
AU - Huang, C.
AU - Wang, C.
AU - Yu, Y.
PY - 2019
SP - 168
EP - 173
DO - 10.5220/0007374701680173

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