title: Dynamic phase evaluation in sparse-sampled temporal speckle pattern sequence.
abstract: The rapid progress of modern manufacturing technology has posed stringent requirements for inspecting techniques for vibration characterization and dynamic testing. Because of its simplicity, accuracy, and whole-field character, speckle interferometry has served as one of the major techniques for dynamic measurement, where normally a dense-sampled temporal speckle sequence is captured for phase retrieval using Fourier or wavelet transforms. In this Letter, a method is proposed for phase evaluation of sparse-sampled speckle patterns when the sampling rate is lower than two points per temporal cycle. Dynamic experiments using a high-speed camera demonstrated the effectiveness of the proposed method for complicated wrapped phase retrieval in electronic/digital speckle pattern interferometry.
authors.affiliation: State Key Laboratory of CAD&CG, Zhejiang University, Hangzhou, Zhejiang Province, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Huang
authors.forename: Y S
authors.initials: YS
authors.lastname: Liu
authors.forename: S Y
authors.initials: SY
authors.lastname: Hung
authors.forename: C G
authors.initials: CG
authors.lastname: Li
authors.forename: Farrokh
authors.initials: F
authors.lastname: Janabi-Sharifi