title: A phase retrieval method of interferograms add-subtracting based on two-step phase shifting.
abstract: A phase retrieval method is introduced in quantitative phase imaging (QPI) based on two-step phase-shifting technique. By acquiring two measured interferograms and calculating the addition and subtraction between them, the quantitative phase information can be directly retrieved. This method is illustrated by both theory and simulation experiments of a ball. The results of the simulation and the experiment of the red blood cell show a good agreement, demonstrating its application for studying cells.
authors.affiliation: School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Xu
authors.affiliation: School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China Faculty of Science, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Yawei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Faculty of Science, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Ji
authors.affiliation: School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Jin
authors.affiliation: Faculty of Science, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Bu
authors.affiliation: Faculty of Science, Jiangsu University, Zhenjiang 212013, P.R. China.
authors.forename: Xuefu
authors.initials: X
authors.lastname: Shang
mesh_terms: D000465:Algorithms; D002478:Cells, Cultured; D004912:Erythrocytes / Q000166:cytology*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008857:Microscopy, Interference / Q000295:instrumentation / Q000379:methods*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013382:Subtraction Technique
keywords: Biotechnology; addition and subtraction; phase retrieval; quantitative phase imaging; two-step phase shifting