Application of heterodyne interferometry for the full-field surface shape measurement

2001 ◽  
Author(s):  
Romulad Jozwicki ◽  
Tomasz S. Tkaczyk
Keyword(s):  
Surface Shape ◽  
Shape Measurement ◽  
Heterodyne Interferometry ◽  
Full Field

Establishment of Full-field Surface Shape Measurement System for Deployable Membrane

2020 ◽  
Vol 2020 (0) ◽  
pp. 104
Author(s):  
Yoshiki OKUMURA ◽  
Naoki NISHIDA ◽  
YiYong ANG ◽  
Takuya HARA ◽  
Nobuhisa KATSUMATA ◽  
...  
Keyword(s):  
Measurement System ◽  
Surface Shape ◽  
Shape Measurement ◽  
Full Field

scholarly journals Full-field 3D shape measurement of specular surfaces by direct phase to depth relationship

2016 ◽  
Author(s):  
Zonghua Zhang ◽  
Yue Liu ◽  
Shujun Huang ◽  
Zhenqi Niu ◽  
Jiao Guo ◽  
...  
Keyword(s):  
Shape Measurement ◽  
Full Field ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Depth Relationship ◽  
Specular Surfaces

New Method for Surface Shape Measurement Based on Brox Optical Flow Algorithm

2020 ◽  
Vol 40 (17) ◽  
pp. 1712004
Author(s):  
唐钰欣 Tang Yuxin ◽  
孙平 Sun Ping ◽  
代晴 Dai Qing ◽  
范超 Fan Chao ◽  
类智方 Lei Zhifang
Keyword(s):  
Optical Flow ◽  
Surface Shape ◽  
New Method ◽  
Shape Measurement ◽  
Flow Algorithm

Determination of Phase Shift by Digital Holography

2019 ◽  
Vol 888 ◽  
pp. 43-46
Author(s):  
Yoshitaka Takahashi ◽  
Masatoshi Saito ◽  
Toru Nakajima ◽  
Masakazu Shingu
Keyword(s):  
Phase Shift ◽  
Noise Reduction ◽  
Digital Holography ◽  
High Accuracy ◽  
Measured Data ◽  
Phase Shifting ◽  
Surface Shape ◽  
Shape Measurement ◽  
Phase Shifting Interferometry

In phase shifting interferometry phase shift is applied by various ways, but applying it with high accuracy, especially by LD current modulation, is not easy. In order to determine the accurate phase shift a new method has been proposed that the value of LD current corresponding to π/2 phase shift can be determined by phase shifting digital holography. The measured data of standard in surface shape measurement were used for calibration, and the obtained value was confirmed to cause noise reduction and improvement of holographic reconstructed images in digital holography.

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