Open AccessNovel method for increasing accuracy of projection moiré contouring of large surfaces
Author(s) -
Ying Tang,
Jun Yao,
Jubing Chen
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.021190
Subject(s) - optics , moiré pattern , structured light 3d scanner , projection (relational algebra) , contouring , pixel , plane (geometry) , displacement (psychology) , sensitivity (control systems) , projection method , iterative method , computer science , algorithm , mathematics , physics , geometry , computer graphics (images) , psychology , scanner , grating , electronic engineering , psychotherapist , engineering
Projection moiré is a high resolution, non-contact, full field method for measuring out-of-plane displacements. Here, we develop a novel model for projection moiré system and derive a universal formula expressing the relation between phase variation and out-of-plane displacement. In order to eliminate the error caused by mismatching of pixels and changing of sensitivity coefficient, an iterative algorithm is presented which expands measurements to the magnitude of depth of field. Computer simulations and actual experiments prove the validity of the proposed method.