Continuous-wave off-axis and in-line terahertz digital holography with phase unwrapping and phase autofocusing

2018 ◽  
Vol 426 ◽  
pp. 612-622 ◽  
Author(s):  
Haochong Huang ◽  
Dayong Wang ◽  
Lu Rong ◽  
Spozmai Panezai ◽  
Donglei Zhang ◽  
...  
Keyword(s):  
Digital Holography ◽  
Continuous Wave ◽  
Phase Unwrapping

scholarly journals Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Davood Khodadad
Keyword(s):  
Phase Difference ◽  
Digital Holography ◽  
Relative Phase ◽  
Groove Depth ◽  
Phase Unwrapping ◽  
Shape Measurement ◽  
Phase Ambiguity ◽  
Holographic Method ◽  
Height Range ◽  
Phase Differences

We present a digital holographic method to increase height range measurement with a reduced phase ambiguity using a dual-directional illumination. Small changes in the angle of incident illumination introduce phase differences between the recorded complex fields. We decrease relative phase difference between the recorded complex fields 279 and 139 times by changing the angle of incident 0.5° and 1°, respectively. A two cent Euro coin edge groove is used to measure the shape. The groove depth is measured as ≈300  μm. Further, numerical refocusing and analysis of speckle displacements in two different planes are used to measure the depth without a use of phase unwrapping process.

Continuous-wave terahertz multi-plane in-line digital holography

2017 ◽  
Vol 94 ◽  
pp. 76-81 ◽  
Author(s):  
Haochong Huang ◽  
Dayong Wang ◽  
Weihua Li ◽  
Lu Rong ◽  
Zachary D. Taylor ◽  
...  
Keyword(s):  
Digital Holography ◽  
Continuous Wave

Continuous-wave terahertz diffraction tomography based on digital holography

2021 ◽  
Author(s):  
Xiaoyu Jin ◽  
Jie Zhao ◽  
Dayong Wang ◽  
Yunxin Wang ◽  
Lu Rong
Keyword(s):  
Digital Holography ◽  
Continuous Wave ◽  
Diffraction Tomography

Investigation on Phase Unwrapping Algorithms in Digital Holography

2009 ◽  
Vol 29 (12) ◽  
pp. 3323-3327 ◽  
Author(s):  
张亦卓 Zhang Yizhuo ◽  
王大勇 Wang Dayong ◽  
赵洁 Zhao Jie ◽  
万玉红 Wan Yuhong ◽  
江竹青 Jiang Zhuqing ◽  
...  
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping

scholarly journals Phase Unwrapping using Modified Goldstein Algorithm in Digital Holography

2007 ◽  
Vol 18 (2) ◽  
pp. 122-129 ◽  
Author(s):  
Seon-Kyu Yoon ◽  
Hyung-Jun Cho ◽  
Doo-Cheol Kim ◽  
Young-Hun Yu ◽  
Sung-Kyu Kim
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping

scholarly journals Tile-Based Two-Dimensional Phase Unwrapping for Digital Holography Using a Modular Framework

PLoS ONE ◽  
2015 ◽  
Vol 10 (11) ◽  
pp. e0143186 ◽  
Author(s):  
Georgios C. Antonopoulos ◽  
Benjamin Steltner ◽  
Alexander Heisterkamp ◽  
Tammo Ripken ◽  
Heiko Meyer
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping ◽  
Two Dimensional ◽  
Modular Framework

Two-dimensional Phase Unwrapping for Digital Holography

2012 ◽  
Author(s):  
Neal K. Bambha ◽  
Justin R. Bickford ◽  
Jr Klett ◽  
Karl K.
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping ◽  
Two Dimensional

Investigation on Phase Unwrapping in Dual-Wavelength Digital Holography

2012 ◽  
Vol 32 (10) ◽  
pp. 1009001
Author(s):  
王羽佳 Wang Yujia ◽  
江竹青 Jiang Zhuqing ◽  
高志瑞 Gao Zhirui ◽  
蔡文苑 Cai Wenyuan ◽  
伍江涛 Wu Jiangtao
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping ◽  
Dual Wavelength

Continuous-wave Terahertz Digital Holography on Biological Specimen

2014 ◽  
Author(s):  
Lu Rong ◽  
Dayong Wang ◽  
Tatiana Latychevskaia ◽  
Xun Zhou ◽  
Yunxin Wang
Keyword(s):  
Digital Holography ◽  
Continuous Wave ◽  
Biological Specimen
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