An optical measurement method, the fold-ray videometrics method, that is applicable to the deformation measurement of large structures is proposed. Through an illustration of ship deformation, the principle of fold-ray videometrics and the composition of the deformation measurement system are introduced. The fold-ray videometrics method is able to transfer or relay three-dimensional geometric information with a fold-ray optical path and thus is capable of real-time measurement of three-dimensional positions, attitudes, and deformations between nonintervisible objects and those of intervisible objects with a very large angle of view. The proposed method therefore has the potential to be applied in deformation measurement of large structures.
© 2009 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: June 8, 2009
Manuscript Accepted: July 22, 2009
Published: August 11, 2009
Qifeng Yu, Guangwen Jiang, Sihua Fu, Zhichao Chao, Yang Shang, and Xiangyi Sun, "Fold-ray videometrics method for the deformation measurement of nonintervisible large structures," Appl. Opt. 48, 4683-4687 (2009)