Optical shape measurement technology: past, present, and future

2000 ◽  
Author(s):  
Jonathan M. Huntley
Keyword(s):  
Shape Measurement ◽  
Measurement Technology ◽  
Optical Shape Measurement

scholarly journals High Speed 3D Shape Measurement with Temporal Fourier Transform Profilometry

2019 ◽  
Vol 9 (19) ◽  
pp. 4123 ◽  
Author(s):  
Haihua Zhang ◽  
Qican Zhang ◽  
Yong Li ◽  
Yihang Liu
Keyword(s):  
Fourier Transform ◽  
High Speed ◽  
Shape Measurement ◽  
Measurement Technology ◽  
Reconstruction Process ◽  
Measured Object ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Fourier Transform Profilometry ◽  
Dynamic Objects

A novel high-speed 3D shape measurement technology called temporal Fourier transform profilometry (TFTP for short) is proposed by combining the merits of Fourier transform profilometry (FTP) and phase-measuring profilometry (PMP). Instead of using the digital light projector, a mechanical projector is employed to generate multi-period phase-shifting fringe patterns sequentially. During the reconstruction process, the phase value of each pixel is calculated independently along the temporal axis and no spectrum filtering operation is performed in a spatial domain. Therefore, high-frequency components containing the detailed information of the measured object effectively remain. The proposed method is suitable for measuring isolated dynamic objects. Only one frame of deformed fringe pattern is required to retrieve one 3D shape of the measured object, so it has the obvious advantage if measuring the dynamic scene at a high speed. A low-cost self-made mechanical projector with fast projection speed is developed to execute the principle-proof experiments, whose results demonstrate the feasibility of measuring isolated dynamic objects.

Development of three-dimensional shape measurement technology for strawberries

2018 ◽  
pp. 387-392 ◽  
Author(s):  
M. Takahashi ◽  
H. Umeda ◽  
Y. Iwasaki ◽  
O. Koike ◽  
S. Takayama ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Shape Measurement ◽  
Measurement Technology ◽  
Dimensional Shape ◽  
Three Dimensional Shape

In-situ shape measurement technology during large aperture optical planar continuous polishing process

2018 ◽  
Author(s):  
Ruiqing Xie ◽  
Defeng Liao ◽  
Jian Chen ◽  
Shijie Zhao ◽  
Xianhua Chen ◽  
...  
Keyword(s):  
Shape Measurement ◽  
Measurement Technology ◽  
Polishing Process ◽  
Large Aperture
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