title: Improved Fourier-transform profilometry.
abstract: An improved optical geometry of the projected-fringe profilometry technique, in which the exit pupil of the projecting lens and the entrance pupil of the imaging lens are neither at the same height above the reference plane nor coplanar, is discussed and used in Fourier-transform profilometry. Furthermore, an improved fringe-pattern description and phase-height mapping formula based on the improved geometrical generalization is deduced. Employing the new optical geometry, it is easier for us to obtain the full-field fringe by moving either the projector or the imaging device. Therefore the new method offers a flexible way to obtain reliable height distribution of a measured object.
authors.affiliation: Department of Optoelectronics, Sichuan University, Chengdu, China. mx9971f@163.com
authors.forename: Xianfu
authors.initials: X
authors.lastname: Mao
authors.forename: Wenjing
authors.initials: W
authors.lastname: Chen
authors.forename: Xianyu
authors.initials: X
authors.lastname: Su