title: Single-phase-step method with contoured correlation fringe patterns for ESPI.
abstract: Speckle fringe patterns of electronic speckle pattern interferometry (ESPI) are full of high-level speckle noise and are mainly processed by phase-shifting methods that normally require three speckle fringe patterns or more. The author proposes a novel method, the contoured correlation-fringe-pattern (CCFP) method, by which speckle-noise-free fringe patterns can be generated for ESPI. The application of this novel method is extended to the phase-shifting or phase-stepping for ESPI after its improvement. It generates speckle-noise-free phase fringes and remains valid for single phase-step condition, thus eliminates the two main disadvantages of the phase-shifting (stepping) methods of ESPI.
authors.forename: Qifeng
authors.initials: Q
authors.lastname: Yu
authors.forename: Sihua
authors.initials: S
authors.lastname: Fu
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Liu
authors.forename: Xia
authors.initials: X
authors.lastname: Yang
authors.forename: Xiangyi
authors.initials: X
authors.lastname: Sun