Share Email Print
cover

Proceedings Paper

Undersampled phase retrieval by a lateral shearing and zooming approach
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

In the optical interferometry fields, the phase extracted by the arctangent function is a 2π-wrapped phase, it is necessary to carry out the phase unwrapping to obtain a correct continuous phase distribution. However the undersampled phase occurs due to too low sampling frequency and higher fringe density, thus the common unwrapping algorithms will fail. Aimed at the undersampled problem, a phase unwrapping algorithm based on lateral shearing and zooming is presented in the paper. The algorithm combines least square phase unwrapping based on second lateral shearing and bicubic interpolation to obtain larger anti-undersampled range. Taking peaks function as object, the anti-undersampled ranges are analyzed for different phase unwrapping algorithms. It can be shown that the presented algorithm retrieves the continuous phase of 2750 times the peaks function. The algorithm can provide a phase unwrapping solution for the serious undersampled phase, and the analyses of anti-undersampled capability for different phase unwrapping algorithms also are as a reference for future measurement.

Paper Details

Date Published: 12 March 2020
PDF: 7 pages
Proc. SPIE 11438, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, 114380L (12 March 2020); doi: 10.1117/12.2543843
Show Author Affiliations
Yun Liu, Xi'an Univ. of Technology (China)
Mingxing Jiao, Xi'an Univ. of Technology (China)
Xuan Li, Xi'an Univ. of Technology (China)
Junhong Xing, Xi'an Univ. of Technology (China)
Chuxian Zhan, Xi'an Univ. of Technology (China)
Bang Wang, Xi'an Univ. of Technology (China)
Zhichao Zhang, Xi'an Univ. of Technology (China)
Jinyu Wei, Xi'an Univ. of Technology (China)
Lu Si, Xi'an Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11438:
2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology
Guohai Situ; Xun Cao; Wolfgang Osten, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray