Twin-image reduction method for in-line digital holography using periphery and random reference phase-shifting techniques

2015 ◽  
Vol 350 ◽  
pp. 270-275 ◽  
Author(s):  
Teppei Oshima ◽  
Yusuke Matsudo ◽  
Takashi Kakue ◽  
Daisuke Arai ◽  
Tomoyoshi Shimobaba ◽  
...  
2010 ◽  
Vol 6 (10) ◽  
pp. 472-478 ◽  
Author(s):  
Takashi Kakue ◽  
Kenichi Ito ◽  
Tatsuki Tahara ◽  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
...  

2006 ◽  
Author(s):  
Sang Keun Gil ◽  
Seok Hee Jeon ◽  
Nam Kim ◽  
Jong Rae Jeong

2012 ◽  
Vol 6-7 ◽  
pp. 76-81
Author(s):  
Yong Liu ◽  
Ding Fa Huang ◽  
Yong Jiang

Phase-shifting interferometry on structured light projection is widely used in 3-D surface measurement. An investigation shows that least-squares fitting can significantly decrease random error by incorporating data from the intermediate phase values, but it cannot completely eliminate nonlinear error. This paper proposes an error-reduction method based on double three-step phase-shifting algorithm and least-squares fitting, and applies it on the temporal phase unwrapping algorithm using three-frequency heterodyne principle. Theoretical analyses and experiment results show that this method can greatly save data acquisition time and improve the precision.


Author(s):  
Roghayeh Yazdani ◽  
Hamidreza Fallah

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.


2013 ◽  
Vol 38 (14) ◽  
pp. 2463 ◽  
Author(s):  
Tatsuki Tahara ◽  
Yasunori Ito ◽  
Peng Xia ◽  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
...  

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