A New Calibration Procedure for 3-D Shape Measurement System Based on Phase-Shifting Projected Fringe Profilometry

2009 ◽  
Vol 58 (5) ◽  
pp. 1291-1298 ◽  
Author(s):  
R. Anchini ◽  
G. Di Leo ◽  
C. Liguori ◽  
A. Paolillo
Keyword(s):  
Measurement System ◽  
Calibration Procedure ◽  
Phase Shifting ◽  
Shape Measurement

3D shape measurement system based on fringe projection in 4-step phase shifting

2015 ◽  
Vol 36 (4) ◽  
pp. 584-589 ◽  
Author(s):  
Shang Zhong-yi ◽  
Li Wei-xian ◽  
Dong Ming-li ◽  
Duan Liang-jun
Keyword(s):  
Measurement System ◽  
Phase Shifting ◽  
Fringe Projection ◽  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement

Real-Time Shape Measurement by Unwrapping Method Using Aliasing

2006 ◽  
Vol 326-328 ◽  
pp. 31-34 ◽  
Author(s):  
Motoharu Fujigaki ◽  
Toshio Toyotake ◽  
Toru Matui ◽  
Yoshiharu Morimoto
Keyword(s):  
Real Time ◽  
Measurement System ◽  
Measurement Method ◽  
Fourier Spectrum ◽  
Phase Unwrapping ◽  
Phase Shifting ◽  
Cycle Phase ◽  
Shape Measurement ◽  
Time Shape ◽  
Two Component

We previously proposed a real-time shape measurement method using two-component synthesis grating projection. In the method, phase unwrapping of the projected grating is performed by using aliasing of the Fourier spectrum of the grating images. It requires only 5 images obtained for one-cycle phase-shifting. Each phase in the two-component can be extracted from only 5 phase-shifted grating images. In this paper, we propose a real-time shape measurement system. The theory, the algorithm for the analysis and the experimental results are shown.

Deformation and 3D-shape measurement system based on phase-shifting digital holography

2002 ◽  
Author(s):  
Songcan Lai ◽  
Ervin Kolenovic ◽  
Wolfgang Osten ◽  
Werner P. O. Jueptner
Keyword(s):  
Measurement System ◽  
Digital Holography ◽  
Phase Shifting ◽  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement

scholarly journals Uniaxial 3D Measurement with Auto-Synchronous Phase-Shifting and Defocusing Based on a Tilted Grating

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3730
Author(s):  
Hui Ren ◽  
Yuankun Liu ◽  
Yajun Wang ◽  
Ningyi Liu ◽  
Xin Yu ◽  
...  
Keyword(s):  
Computer Simulation ◽  
High Precision ◽  
Measurement System ◽  
Small Angle ◽  
Image Plane ◽  
Phase Shifting ◽  
Shape Measurement ◽  
3D Measurement ◽  
Fringe Analysis ◽  
Measured Object

Conventional uniaxial techniques generally require shifting objects or projection grating with the assistance of a high-precision mechanical moving component. To overcome this limitation, we propose a novel uniaxial 3-D shape measurement system with auto-synchronous phase-shifting and defocusing by using a tilted and fixed projection grating. The tilted focused image plane (FIP), which is reflected by a mirror at about 90 degrees, could be shifted across the measured surface by slightly rotating the mirror within a small angle range. This procedure will simultaneously introduce the change in defocusing and phase-shifting of the fringe. The modulation curve of each point can be deciphered by Fourier fringe analysis after a sequence of fringe intensities is acquired. Since both the measured object and projection grating are fixed, the proposed method could make the measurement system more compact and flexible. Both computer simulation and experiments are carried out to demonstrate the validity of this proposed system.

Phase Error Immunity Optical Measurement System

2010 ◽  
Vol 142 ◽  
pp. 194-198
Author(s):  
Wan Tao He ◽  
Xiang Lin Meng ◽  
Can Zhao
Keyword(s):  
Measurement System ◽  
Optical Measurement ◽  
Phase Error ◽  
Phase Shifting ◽  
Fringe Projection ◽  
Shape Measurement ◽  
The Real ◽  
3D Shape Measurement ◽  
Digital Fringe Projection ◽  
Vision Algorithm

In this paper, a 3D shape measurement system based on a digital fringe projection and phase-shifting technique was described. The fringe generated by a computer was projected onto the object by utilizing a digital video projector. Four steps phase shifting algorithm was used to calculate the 2π wrapping phase, and a heterodyne principle was used to unwrap the phase to obtain the real phase. Then the 3D coordinates object was calculated base on stereo vision algorithm by using the real phase as a constraint. Experiments demonstrated that the system was not sensitive to the phase error caused by the DVP’s nonlinearity.

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