Simultaneous Measurement of Surface Shape and Optical Homogeneity with Dual-Wavelength Phase-Shifting Digital Holography

2011 ◽  
Author(s):  
Xiaoyi Zheng ◽  
Yurong Wang ◽  
Jie Li ◽  
Xiangfeng Meng ◽  
Yubao Sun ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
Digital Holography ◽  
Phase Shifting ◽  
Surface Shape ◽  
Dual Wavelength ◽  
Optical Homogeneity

Surface Shape Measurement by Dual-wavelength Phase-shifting Digital Holography

Fringe 2005 ◽  
2006 ◽  
pp. 396-403 ◽  
Author(s):  
Ichirou Yamaguchi ◽  
Shinji Yamashita ◽  
Masayuki Yokota
Keyword(s):  
Digital Holography ◽  
Phase Shifting ◽  
Surface Shape ◽  
Dual Wavelength ◽  
Shape Measurement

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.

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

Doppler phase-shifting digital holography and its application to surface shape measurement

2010 ◽  
Vol 35 (10) ◽  
pp. 1548 ◽  
Author(s):  
Yuichi Kikuchi ◽  
Daisuke Barada ◽  
Tomohiro Kiire ◽  
Toyohiko Yatagai
Keyword(s):  
Digital Holography ◽  
Phase Shifting ◽  
Surface Shape ◽  
Shape Measurement

Single-shot dual-wavelength phase unwrapping in parallel phase-shifting digital holography

2014 ◽  
Vol 39 (8) ◽  
pp. 2374 ◽  
Author(s):  
Yonghee Lee ◽  
Yasunori Ito ◽  
Tatsuki Tahara ◽  
Junichi Inoue ◽  
Peng Xia ◽  
...  
Keyword(s):  
Digital Holography ◽  
Phase Unwrapping ◽  
Phase Shifting ◽  
Dual Wavelength ◽  
Single Shot

Dual-Wavelength Digital Holography Based on Phase-Division Multiplexing Using Four Wavelength-Multiplexed Phase-Shifted Holograms and Zeroth-Order Diffraction-Image Suppression

2017 ◽  
Vol 11 (5) ◽  
pp. 806-813 ◽  
Author(s):  
Tatsuki Tahara ◽  
Reo Otani ◽  
Yasuhiko Arai ◽  
Yasuhiro Takaki ◽  
◽  
...  
Keyword(s):  
Image Quality ◽  
Intensity Ratio ◽  
Digital Holography ◽  
Averaging Method ◽  
Phase Shifting ◽  
Dual Wavelength ◽  
Diffraction Image ◽  
Zeroth Order ◽  
Incoherent Light ◽  
Order Diffraction

We propose a dual-wavelength phase-shifting digital holography technique with four wavelength-multiplexed holograms based on phase-division multiplexing utilizing the 2π ambiguity and zeroth-order diffraction-image suppression. Zeroth-order wave suppression is implemented by introducing the averaging method. Its effectiveness is experimentally shown and numerically and quantitatively investigated. The numerical investigation demonstrates the tolerance of the proposed technique against incoherent light noise and changes in the reference wave intensity. The image quality in the proposed technique depends on the intensity ratio between the object and reference waves but does not degrade with constant changes in intensity. In contrast, a previously reported four-step dual-wavelength phase-shifting technique was affected by the factors described above.

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