Phase shift error compensation method for digital holography using statistics of speckle field

2010 ◽  
Author(s):  
H. Kadono ◽  
M. Kataoka ◽  
V. D. Madjarova
Keyword(s):  
Phase Shift ◽  
Error Compensation ◽  
Digital Holography ◽  
Compensation Method ◽  
Speckle Field ◽  
Phase Shift Error

scholarly journals Color Digital Holography Based on Generalized Phase-Shifting Algorithm with Monitoring Phase-Shift

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 241
Author(s):  
Minwoo Jung ◽  
Hosung Jeon ◽  
Sungjin Lim ◽  
Joonku Hahn
Keyword(s):  
Phase Shift ◽  
Focal Plane ◽  
Digital Holography ◽  
Phase Shifter ◽  
Phase Shifting ◽  
Signal Wave ◽  
Color Filter ◽  
Object Image ◽  
Phase Shift Error ◽  
Monitoring Phase

Color digital holography (DH) has been researched in various fields such as the holographic camera and holographic microscope because it acquires a realistic color object wave by measuring both amplitude and phase. Among the methods for color DH, the phase-shifting DH has an advantage of obtaining a signal wave of objects without the autocorrelation and conjugate noises. However, this method usually requires many interferograms to obtain signals for all wavelengths. In addition, the phase-shift algorithm is sensitive to the phase-shift error caused by the instability or hysteresis of the phase shifter. In this paper, we propose a new method of color phase-shifting digital holography with monitoring the phase-shift. The color interferograms are recorded by using a focal plane array (FPA) with a Bayer color filter. In order to obtain the color signal wave from the interferograms with unexpected phase-shift values, we devise a generalized phase-shifting DH algorithm. The proposed method enables the robust measurement in the interferograms. Experimentally, we demonstrate the proposed algorithm to reconstruct the object image with negligibly small conjugate noises.

Compensation algorithm for the phase-shift error of polarization-based parallel two-step phase-shifting digital holography

2010 ◽  
Vol 50 (7) ◽  
pp. B31 ◽  
Author(s):  
Tatsuki Tahara ◽  
Kenichi Ito ◽  
Takashi Kakue ◽  
Motofumi Fujii ◽  
Yuki Shimozato ◽  
...  
Keyword(s):  
Phase Shift ◽  
Digital Holography ◽  
Phase Shifting ◽  
Compensation Algorithm ◽  
Phase Shift Error

A channel phase error compensation method for multi-channel synthetic aperture ladar

Optik ◽  
2019 ◽  
Vol 178 ◽  
pp. 830-840
Author(s):  
Shuai Wang ◽  
Maosheng Xiang ◽  
Bingnan Wang ◽  
Fubo Zhang ◽  
Yirong Wu
Keyword(s):  
Error Compensation ◽  
Phase Error ◽  
Compensation Method ◽  
Synthetic Aperture

An on-machine error compensation method for an ultra-precision turning machine

2017 ◽  
Vol 233 (5) ◽  
pp. 1608-1613
Author(s):  
Xicong Zou ◽  
Xuesen Zhao ◽  
Guo Li ◽  
Zengqiang Li ◽  
Zhenjiang Hu ◽  
...  
Keyword(s):  
Error Compensation ◽  
Rapid Development ◽  
Compensation Method ◽  
Machining Accuracy ◽  
Manufacturing Cost ◽  
Program Code ◽  
Machine Error ◽  
Measurement Results ◽  
Ultra Precision ◽  
Compensation Technique

On-machine error compensation (OMEC) is efficient at improving machining accuracy without increasing extra manufacturing cost, and involves the on-machine measurement (OMM) of machining accuracy and modification of program code based on the measurement results. As an excellent OMM technique, chromatic confocal sensing allows for the rapid development of accurate and reliable error compensation technique. The present study integrated a non-contact chromatic confocal probe into an ultra-precision machine for OMM and OMEC of machined components. First, the configuration and effectiveness of the OMM system were briefly described, and the relevant OMEC method was presented. With the OMM result, error compensation software was then developed to automatically generate a modified program code for error compensation. Finally, a series of cutting experiments were performed to verify the validity of the proposed OMEC method. The experimental results demonstrate that the proposed error compensation method is reliable and considerably improves the form error of machined components.

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