title: Fold-ray videometrics method for the deformation measurement of nonintervisible large structures.
abstract: 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.
authors.affiliation: College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China. yuqifeng@vip.sina.com
authors.forename: Qifeng
authors.initials: Q
authors.lastname: Yu
authors.forename: Guangwen
authors.initials: G
authors.lastname: Jiang
authors.forename: Sihua
authors.initials: S
authors.lastname: Fu
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Chao
authors.forename: Yang
authors.initials: Y
authors.lastname: Shang
authors.forename: Xiangyi
authors.initials: X
authors.lastname: Sun