Results 291 to 300 of about 538,193 (321)

Optimum phase retrieval using the transport of intensity equation

SPIE Proceedings, 2014
The Transport of Intensity Equation (TIE) relates linearly the phase of an object to the intensity distribution in the Fresnel region and can be used as a phase retrieval technique. The key element in a TIE based solver is the calculation of the axial intensity derivative.
J. Martínez-Carranza, K. Falaggis, T. Kozacki   +2 more
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The transport of intensity equation and partially coherent fields

Biomedical Optics and 3-D Imaging, 2012
We examine the physical meaning of the phase recovered from the transport of intensity equation (TIE) with partially coherent illumination and verify experimentally a modification of the TIE which removes effects of nonuniform illumination from measurements of sample thickness.
Jonathan C. Petruccelli, Lei Tian, George Barbastathis   +2 more
openaire   +1 more source

Phase measurement of atomic resolution image using transport of intensity equation

Microscopy, 2005
Since the Transport Intensity Equation (TIE) has been applied to electron microscopy only recently, there are controversial discussions in the literature regarding the theoretical concepts underlying the equation and the practical techniques to solve the equation.
Kazuo, Ishizuka, Brendan, Allman
openaire   +2 more sources

Transport of intensity equation: noninterferometic phase imaging and diffraction tomography

OSA Optical Sensors and Sensing Congress 2021 (AIS, FTS, HISE, SENSORS, ES), 2021
In this talk, we provide an overview of the basic principle, research fields, and representative applications of transport of intensity equation, focusing particularly on optical imaging and microscopy.).
openaire   +1 more source

An iterative compensation solution to the transport-of-intensity equation

Advanced Optical Imaging Technologies III, 2020
In this Letter, we propose a universal iterative compensation solution to the transport-of-intensity equation (US- TIE) with the advantages of high accuracy, convergence guarantee, applicability to arbitrarily-shaped regions, and simplified implementation and computation.
Jialin Zhang, Qian Chen, Jiasong Sun, Long Tian, Chao Zuo   +4 more
openaire   +1 more source

Two-Wavelength Transport of Intensity Equation for Phase Unwrapping

2016
A novel method based on two-wavelength transport of intensity equation (TW-TIE) is proposed for phase unwrapping under large-step discontinuities condition. With a wrapped phase obtained by interferometry setup, two different wavelength illuminations are used to obtain two different intensity images, then TW-TIE is applied to phase unwrapping ...
Zhang Cheng, Cheng Hong, Shen Chuan, Zhang Fen, Bao Wen-Xia, Wei Sui, Han Chao, Fang Jie, Xia Yun   +8 more
openaire   +1 more source

Multiplicative Reconstruction Based on the Transport of Intensity Equation

2018
In order to effectively recover the phase information of the object and reconstruct the three-dimensional shape of the object, a multiplicative reconstruction based on the transport of intensity equation (TIE) is proposed. Firstly, combining with the relationship between the light field moment imaging and the TIE, the phase information and the first ...
Cheng Hong, Wang Jincheng, Shen Chuan, Zhang Cheng, Zhang Fen, Bao Wenxia   +5 more
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Quantitative imaging of yeast cells using transport of intensity equation

2015 Workshop on Recent Advances in Photonics (WRAP), 2015
In biology most microscopy specimens, in particular living cells are transparent. In cell imaging, it is hard to create an image of a cell which is transparent with a very small refractive index change with respect to the surrounding media. Various techniques like addition of staining and contrast agents, markers have been applied in the past for ...
Praveen Kumar Poola, Vimal Prabhu Pandiyan, Renu John   +2 more
openaire   +1 more source

Rapid quantitative phase imaging using the transport of intensity equation

Optics Communications, 1997
Abstract A method for digital phase imaging is proposed. It requires the measurement of intensity in two adjacent planes orthogonal to the optical axis. The phase is subsequently recovered by a Fast Fourier Transform of the Transport of Intensity Equation.
T.E Gureyev, K.A Nugent
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High resolution optical surface testing using transport of intensity equation

SPIE Proceedings, 2013
Phase distribution may be determined by measuring only the intensity distributions along the optical axis via the Transport of Intensity Equation (TIE). TIE has been a viable alternative to interferometry techniques for experimental conditions where those techniques perform poorly.
Peyman Soltani, Ali-Reza Moradi, Ahmad Darudi, Ramin Shomali   +3 more
openaire   +1 more source