Spatial phase-shift interferometry: implementation of an effective phase-recovering algorithm

2011 ◽  
Author(s):  
Maurizio Vannoni ◽  
Mauro Melozzi ◽  
Marco Barilli ◽  
Andrea Sordini ◽  
Giuseppe Molesini
Keyword(s):  
Phase Shift ◽  
Spatial Phase ◽  
Effective Phase ◽  
Spatial Phase Shift

Michelson interferometer based spatial phase shift shearography

2013 ◽  
Vol 52 (17) ◽  
pp. 4063 ◽  
Author(s):  
Xin Xie ◽  
Lianxiang Yang ◽  
Nan Xu ◽  
Xu Chen
Keyword(s):  
Phase Shift ◽  
Michelson Interferometer ◽  
Spatial Phase ◽  
Spatial Phase Shift

Simultaneous dual directional strain measurement using spatial phase-shift digital shearography

2016 ◽  
Vol 87 ◽  
pp. 197-203 ◽  
Author(s):  
Yonghong Wang ◽  
Xinya Gao ◽  
Xin Xie ◽  
Sijing Wu ◽  
Yingxue Liu ◽  
...  
Keyword(s):  
Phase Shift ◽  
Strain Measurement ◽  
Spatial Phase ◽  
Spatial Phase Shift

Spatial phase shift during hologram writing in lithium niobate

1983 ◽  
Vol 46 (1) ◽  
pp. 275-280 ◽  
Author(s):  
R. J. Woods ◽  
L. Young
Keyword(s):  
Phase Shift ◽  
Lithium Niobate ◽  
Spatial Phase ◽  
Spatial Phase Shift

Perception of Subjective Contours in Fish

Perception ◽  
10.1068/p6121 ◽  
2009 ◽  
Vol 38 (4) ◽  
pp. 579-590 ◽  
Author(s):  
Valeria Anna Sovrano ◽  
Angelo Bisazza
Keyword(s):  
Phase Shift ◽  
Luminance Contrast ◽  
Phase Shifting ◽  
Orientation Discrimination ◽  
Illusory Contours ◽  
Geometric Figure ◽  
Spatial Phase ◽  
Spatial Phase Shift ◽  
Subjective Surfaces

The ability of fish to perceive subjective (or illusory) contours, ie contours that lack a physical counterpart in terms of luminance contrast gradients, was investigated. In the first experiment, redtail splitfins ( Xenotoca eiseni), family Goodeidae, were trained to discriminate between a geometric figure (a triangle or a square) on various backgrounds and a background without any figure. Thereafter, the fish performed test trials in which illusory squares or triangles were obtained by (i) interruptions of a background of diagonal lines, (ii) phase-shifting of a background of diagonal lines, and (iii) pacmen spatially arranged to induce perception of Kanizsa subjective surfaces. In all three conditions, fish seemed to generalise their responses to stimuli perceived as subjective contours by humans. Fish chose, correctly, squares or triangles made of interrupted or phase-shifted diagonal lines from uniform backgrounds of diagonal lines, as well as illusory square or triangle Kanizsa figures from figures in which the inducing pacmen were scrambled. In the second experiment, fish were trained to discriminate between a vertical and a horizontal bar with luminance contrast gradients, and then tested with vertically and horizontally oriented illusory bars, created either through interruption or spatial phase-shift of inducing diagonal lines. Fish appeared to be able to generalise the orientation discrimination to illusory contours. These results demonstrate that redtail splitfins are capable of perceiving illusory contours.

The Selection of Window in Spatial Phase Shift ESPI

2013 ◽  
Author(s):  
Nan Xu ◽  
Xin Xie ◽  
Xu Chen ◽  
Randy Gu ◽  
Lianxiang Yang
Keyword(s):  
Phase Shift ◽  
Spatial Phase ◽  
Spatial Phase Shift ◽  
Selection Of
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