Removing the Residual Zeroth-Order Diffraction Wave in Polarization-Based Parallel Phase-Shifting Digital Holography System

2011 ◽  
Vol 4 (7) ◽  
pp. 072501 ◽  
Author(s):  
Peng Xia ◽  
Tatsuki Tahara ◽  
Motofumi Fujii ◽  
Takashi Kakue ◽  
Yasuhiro Awatsuji ◽  
...  
Keyword(s):  
Digital Holography ◽  
Phase Shifting ◽  
Zeroth Order ◽  
Order Diffraction ◽  
Diffraction Wave

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.

Effect of Phase-Shifting Error on Deformation Evaluation Using Phase-Shifting Digital Holography

2006 ◽  
Vol 326-328 ◽  
pp. 27-30
Author(s):  
Xin Kang ◽  
Xiao Yuan He ◽  
Cho Jui Tay ◽  
C. Quan
Keyword(s):  
Computer Simulation ◽  
Digital Holography ◽  
Zero Order ◽  
Phase Shifting ◽  
Phase Shifting Technique ◽  
Order Diffraction

Phase-shifting technique is an effect way to suppress the zero order diffraction and the conjugate term in digital holography. However the phase-shifting error will influence inevitably the evaluation precision in practice operation. In this paper, the deformation evaluation errors by means of two kinds of four-step phase-shifting algorithms, which are in common use in digital holography, are analyzed and compared by computer simulation. In addition, the phase-shifting errors may cumulate or not according to different phase-shifting techniques, and both cases are considered in this paper. The results based on the digital in-line holography show that the two four-step phase-shifting algorithms possess different sensitivity to the phase-shifting errors, and the preferable one, which is more immune to the phase-shifting errors, is educed in conclusion.

Parallel Phase-Shifting Digital Holography Capable of Simultaneously Capturing Visible and Invisible Three-Dimensional Information

2010 ◽  
Vol 6 (10) ◽  
pp. 472-478 ◽  
Author(s):  
Takashi Kakue ◽  
Kenichi Ito ◽  
Tatsuki Tahara ◽  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
...  
Keyword(s):  
Digital Holography ◽  
Three Dimensional ◽  
Phase Shifting

Successive encryption and transmission with phase-shifting digital holography

2006 ◽  
Author(s):  
Sang Keun Gil ◽  
Seok Hee Jeon ◽  
Nam Kim ◽  
Jong Rae Jeong
Keyword(s):  
Digital Holography ◽  
Phase Shifting

Phase-shifting digital holography with an unknown reference beam

2021 ◽  
Author(s):  
Roghayeh Yazdani ◽  
Hamidreza Fallah
Keyword(s):  
Digital Holography ◽  
Phase Retrieval ◽  
Reference Beam ◽  
Phase Shifting ◽  
Retrieval Algorithm ◽  
Reference Field ◽  
Digital Holograms ◽  
Noisy Conditions ◽  
Phase Retrieval Algorithm

In digital holography, errors of the reference field degrade the quality of the reconstructed object field. In this paper, we propose an effective method in phase-shifting digital holography in which the reference field does not need to be known and perfect. The unknown complex amplitudes of both reference and object fields are derived simultaneously. The method employs only five digital holograms and a single execution of a phase retrieval algorithm. So, the required measurements and algorithm executions in this method are fewer than those in other methods; it suggests a simpler and faster method. The effectiveness of the suggested method is indicated by simulation, under noise-free and noisy conditions. Moreover, the capability of the method to extract full information about the phase singularities in both fields is demonstrated.

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