title: Acoustic grating fringe projector for high-speed and high-precision three-dimensional shape measurements.
abstract: A new acoustic grating fringe projector (AGFP) was developed for high-speed and high-precision 3D measurement. A new acoustic grating fringe projection theory is also proposed to describe the optical system. The AGFP instrument can adjust the spatial phase and period of fringes with unprecedented speed and accuracy. Using rf power proportional-integral-derivative (PID) control and CCD synchronous control, we obtain fringes with fine sinusoidal characteristics and realize high-speed acquisition of image data. Using the device, we obtained a precise phase map for a 3D profile. In addition, the AGFP can work in running fringe mode, which could be applied in other measurement fields.
authors.affiliation: School of Instrumentation Science andOpto-electronics Engineering, Beihang University, 10083 Beijing, China. xuebingyin@aspe.buaa.edu.cn
authors.forename: Xuebing
authors.initials: X
authors.lastname: Yin
authors.forename: Huijie
authors.initials: H
authors.lastname: Zhao
authors.forename: Junyu
authors.initials: J
authors.lastname: Zeng
authors.forename: Yufu
authors.initials: Y
authors.lastname: Qu