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[Magnetic induced phase shift detection system based on a novel sensor for cerebral hemorrhage]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu J, Yan L, Qin M, Zhang H, Chen M.
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Phase-shifting interferometry with uncalibrated phase shifts

Applied Optics, 2000
A computationally efficient algorithm for phase-shifting interferometry with imprecise phase shifts is developed. It permits the use of an uncalibrated phase shifter and is also insensitive to spatial intensity variations. The measurement has both spatial and temporal aspects. Comparisons are made between pixels within the same interferogram, and these
X, Chen, M, Gramaglia, J A, Yeazell
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Phase-shift calibration algorithm for phase-shifting interferometry

Journal of the Optical Society of America A, 2000
We propose a novel phase-shift calibration algorithm. With this technique we determine the unknown phase shift between two interferograms by examining the sums and differences of the intensities on each interferogram at the same spatial location, i.e., I1(x, y) +/- I2(x, y). These intensities are normalized so that they become sinusoidal in form.
X, Chen, M, Gramaglia, J A, Yeazell
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Blind phase shift estimation in phase-shifting interferometry

Journal of the Optical Society of America A, 2007
A blind phase shift estimation algorithm that allows simultaneous calculation of phases and phase shifts from three or more interferograms is presented. In phase-shifting interferometry, the phase shift errors introduce specific correlations between the calculated background intensity distribution and the fringe component.
Hongwei, Guo, Yingjie, Yu, Mingyi, Chen
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Phase-shift extraction for generalized phase-shifting interferometry

Optics Letters, 2009
A simple algorithm for blind extraction of phase shifts is proposed for generalized phase-shifting interferometry from only three interferograms. Based on the statistical property of the object wave, the algorithm calculates approximately the involved phase shifts as initial values. The extraction is further improved by an iterative method, considering
Gao, Peng, Yao, Baoli, Lindlein, Norbert, Mantel, Klaus, Harder, Irina, Geist, Eduard   +5 more
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Phase-shifted Fresnel axicon

Optics Letters, 2012
We propose an optical element: a phase-shifted Fresnel axicon for generation of multiple Bessel beams. By giving a binary phase modulation to the standard Fresnel axicon, the proposed element is generated. The phase profile of the binary phase modulation is engineered to generate two and three Bessel beams of equal intensities.
Vijayakumar, A., Bhattacharya, Shanti
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Stroboscopic phase-shifting interferometry

Optics Letters, 1987
The implementation of a new type of phase-shifting, self-referencing interferometer that simultaneously achieves the phase shift and separation of heams with a stationary diffraction grating is described. The capabilities of stroboscopic interferometry are demonstrated with results from an experiment in which the rapidly varying surface deformations of
O Y, Kwon, D M, Shough, R A, Williams
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Phase-shift-amplified interferometry

Optics Letters, 2018
We present a new technique for improving the sensitivity of an interferometer, phase-shift-amplified interferometry (PAI), which is based on two embedded interferometers. The internal interferometer, which is biased in anti-phase, amplifies the phase shift; the external interferometer converts this into an amplified intensity shift. PAI can improve the
Moshe Ben Ayun, Egor Liokumovitch, Daniel Gotliv, Shmuel Sternklar   +3 more
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Reference phase shift determination in phase shifting interferometry

Optics and Lasers in Engineering, 1995
Abstract The phase shifting technique has recently seen application to many types of interferometers, including holographic, speckle and moire systems for strain analysis. In these applications, close control of the phase shifts may be impossible due to the effect of mechanical vibrations, and this presents difficulties when extracting the phase ...
K.E. Perry, J. McKelvie
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Phase-shifting Gabor holography

Optics Letters, 2009
We present a modified Gabor-like setup able to recover the complex amplitude distribution of the object wavefront from a set of inline recorded holograms. The proposed configuration is characterized by the insertion of a condenser lens and a spatial light modulator (SLM) into the classical Gabor configuration.
Vicente, Micó, Javier, García, Zeev, Zalevsky, Bahram, Javidi   +3 more
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