An analysis of the calibration of angle difference in dual-illumination digital holographic interferometry for surface shape measurement

2020 ◽  
Vol 466 ◽  
pp. 125671
Author(s):  
Jun Dong ◽  
Shuhai Jia ◽  
Hongqiang Yu ◽  
Shunjian Xu
Keyword(s):  
Holographic Interferometry ◽  
Surface Shape ◽  
Shape Measurement ◽  
Angle Difference

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.

Real-time surface shape measurement by an active interferometer

1997 ◽  
Vol 4 (1) ◽  
pp. A216-A220 ◽  
Author(s):  
Ji-Yuan Liu ◽  
Ichirou Yamaguchi ◽  
Jun-ichi Kato ◽  
Toshinori Nakajima
Keyword(s):  
Real Time ◽  
Surface Shape ◽  
Shape Measurement ◽  
Active Interferometer

Simultaneous Two-Wavelength Digital Holography and Its Application to Surface Shape Measurement

2011 ◽  
Author(s):  
Daisuke Barada ◽  
Tomohiro Kiire ◽  
Jun-ichiro Sugisaka ◽  
Shigeo Kawata ◽  
Toyohiko Yatagai
Keyword(s):  
Digital Holography ◽  
Surface Shape ◽  
Shape Measurement

Surface Shape Measurement by Phase-Shifting Digital Holography

2001 ◽  
Vol 8 (2) ◽  
pp. 85-89 ◽  
Author(s):  
Ichirou Yamaguchi ◽  
Jun-ichi Kato ◽  
Sohgo Ohta
Keyword(s):  
Digital Holography ◽  
Phase Shifting ◽  
Surface Shape ◽  
Shape Measurement
Sign in / Sign up

Export Citation Format

Share Document