High accuracy phase retrieval algorithm based on the transport of intensity equation under multi-wavelength

Hong Cheng; Wengtong Wu; Quanbing Zhang; Siwei Sun; Yifan Cheng

doi:10.1117/12.2662579

12 April 2023 High accuracy phase retrieval algorithm based on the transport of intensity equation under multi-wavelength

Hong Cheng, Wengtong Wu, Quanbing Zhang, Siwei Sun, Yifan Cheng

Author Affiliations +

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 1256526 (2023) https://doi.org/10.1117/12.2662579
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

A high-precision phase retrieval algorithm based on the transport of intensity equation for multi-wavelength illumination is proposed. First of all, the traditional transport of intensity equation method is used to obtain the phase of a single wavelength, and the initial phase of different wavelengths is calculated according to the corresponding phase relationship between different wavelengths. Secondly, through the wavelength phase synthesis module, the phase of the object under multiple wavelengths is obtained. For the noise amplification problem introduced in the phase synthesis step, the phase unwrapping module is used to eliminate the noise level in the initial phase result and gradually reduce it to the noise level of two synthetic short wavelengths. Finally, the high-precision phase retrieval result is obtained. The experimental results verify the correctness and effectiveness of the proposed method.

Citation Download Citation

Hong Cheng, Wengtong Wu, Quanbing Zhang, Siwei Sun, and Yifan Cheng "High accuracy phase retrieval algorithm based on the transport of intensity equation under multi-wavelength", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 1256526 (12 April 2023); https://doi.org/10.1117/12.2662579

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available