Parallel phase-shifting digital holography system using a high-speed camera

2012 ◽  
Author(s):  
Yasuhiro Awatsuji ◽  
Takashi Kakue ◽  
Tatsuki Tahara ◽  
Peng Xia ◽  
Kenzo Nishio ◽  
...  
Keyword(s):  
High Speed ◽  
Digital Holography ◽  
Phase Shifting ◽  
High Speed Camera

Phase Algorithm Integrating Direct-Correlation and Four-Step Phase-Shifting for Electronic Speckle Pattern Interferometry

2013 ◽  
Vol 448-453 ◽  
pp. 3696-3701
Author(s):  
Yan Bin He ◽  
Xin Zhong Li ◽  
Min Zhou
Keyword(s):  
High Speed ◽  
Speckle Pattern ◽  
Phase Shifting ◽  
Electronic Speckle Pattern Interferometry ◽  
High Speed Camera ◽  
Dynamic Measurements ◽  
High Quality ◽  
Correlation Algorithm ◽  
Phase Map

A phase-shifting algorithm, called a (4,4) algorithm, which takes four phase-shifting interferograms before a specimen is deformed and four interferograms after a specimen is deformed, is presented first. This method is most widely used for phase extraction. Its drawback limited it to be used in dynamic measurements. Also shown is an algorithm called a (4,1) algorithm that takes four phase-shifting interferograms before a specimen is deformed and one interferogram after a specimen is deformed. Because a high-speed camera can be used to record the dynamic interferogram of the specimen, this algorithm has the potential to retain the phase-shifting capability for ESPI in dynamic measurements. The quality of the phase map obtained using (4,1) algorithm is quite lower compared to using (4,4) algorithm. In order to obtain high-quality phase map in dynamic measurements, a direct-correlation algorithm was integrated with the (4,1) algorithm to form DC-(4,1) algorithm which is shown to improve significantly the quality of the phase maps. The theoretical and experimental aspects of this newly developed technique, which can extend ESPI to areas such as high-speed dynamic measurements, are examined in detail.

High-speed parallel phase-shifting digital holography

2011 ◽  
Author(s):  
Takashi Kakue ◽  
Tatsuki Tahara ◽  
Yasuhiro Awatsuji ◽  
Shogo Ura ◽  
Kenzo Nishio ◽  
...  
Keyword(s):  
High Speed ◽  
Digital Holography ◽  
Phase Shifting

120201 Phase-Shifting Photoelastic Experiment Using Polarization High-Speed Camera

2011 ◽  
Vol 2011.17 (0) ◽  
pp. 115-116
Author(s):  
Wataru MURATA ◽  
Eisaku UMEZAKI ◽  
Takashi ONUMA ◽  
Arata MIHARA
Keyword(s):  
High Speed ◽  
Phase Shifting ◽  
High Speed Camera ◽  
Photoelastic Experiment

High-speed 4-D biological microscope based on parallel phase-shifting digital holography

2012 ◽  
Author(s):  
Tatsuki Tahara ◽  
Ryosuke Yonesaka ◽  
Seiji Yamamoto ◽  
Takashi Kakue ◽  
Peng Xia ◽  
...  
Keyword(s):  
High Speed ◽  
Digital Holography ◽  
Phase Shifting
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