Enhanced dual-frequency pattern scheme based on spatial-temporal fringes method. Issue 12 (12th July 2018)

• Record Type: Journal Article
• Authors: Wang, Minmin; Zhou, Canlin; Si, Shuchun; Lei, Zhenkun; Li, Xiaolei; Li, Hui; Li, YanJie
• Is Part Of: Journal of modern optics. Volume 65:Issue 12(2018)
• Page Start: 1495
• Page End: 1506
• Publication Date: 2018-07-12
• Subjects: Phase retrieval -- profilometry -- phase-shifting algorithm -- Fourier transform -- dual-frequency pattern; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2018.1455908
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract: One of the major challenges of employing a dual-frequency phase-shifting algorithm for phase retrieval is its sensitivity to noise. Yun et al proposed a dual-frequency method based on the Fourier transform profilometry, yet the low-frequency lobes are close to each other for accurate band-pass filtering. In the light of this problem, a novel dual-frequency pattern based on the spatial-temporal fringes (STF) method is developed in this paper. Three fringe patterns with two different frequencies are required. The low-frequency phase is obtained from two low-frequency fringe patterns by the STF method, so the signal lobes can be extracted accurately as they are far away from each other. The high-frequency phase is retrieved from another fringe pattern without the impact of the DC component. Simulations and experiments are conducted to demonstrate the excellent precision of the proposed method.