Results 261 to 270 of about 939,663 (300)
Some of the next articles are maybe not open access.
Measurement of acylindrical surface with transport of intensity equation
Applied Optics, 2022High-precision aspherical cylindrical (acylindrical) lenses are difficult to directly measure because of the phase deviation in the off-axis region. To achieve rapid and non-contact measurement of the acylindrical lens surface, a novel optical structure phase measurement, to the best of our knowledge, is presented in this work.
Xingyu, Lin +5 more
openaire +2 more sources
Robust Transport-of-Intensity Equation with Neural Differential Equations
Optica Imaging Congress (3D, COSI, DH, FLatOptics, IS, pcAOP), 2023We solve the transport-of-intensity equation by estimating the intensity derivative using the method of neural differential equations. We observe strong robustness to artifacts from ill-conditionedness and measurement noise.
Subeen Pang, George Barbastathis
openaire +1 more source
Phase Retrieval Using the Transport-of-Intensity Equation
2009 Fifth International Conference on Image and Graphics, 2009The transport-of-intensity equation describes the internal relationship between the intensity and phase distribution while wave is propagating in the mobile space. So the phase distribution can be solved by the use of the equation. It is an important measurement of non-interferometry.
Hong Cheng +3 more
openaire +1 more source
The optical refractometry using transport-of-intensity equation
Laser Physics Letters, 2022Abstract A development of a method for measuring the refractive index of optical media based on the transport-of-intensity equation (TIE) is proposed. The method requires only a complementary metal-oxide semiconductor (CMOS) camera, which registers intensity distributions in several planes.
I V Gritsenko +6 more
openaire +1 more source
Application of transport-of-intensity equation in fringe analysis
Optics Letters, 2014The transport-of-intensity equation (TIE) is applied in the reconstruction of two interfering wavefronts by analyzing the interference patterns and their derivatives along their common propagation directions. The TIE is extended from one wave to two waves and is then applied to calculate the phase of the interference field.
Javad, Amiri +3 more
openaire +2 more sources
Quantitativeness of phase measurement by transport of intensity equation
Journal of Electron Microscopy, 2009Based on the transport of intensity equation (TIE), a phase map can be readily retrieved from only three images of a focal series. The retrieval procedure does not require an iterative calculation and it is performed very fast with the use of the fast Fourier transform.
Masanori, Mitome +2 more
openaire +2 more sources
Depth from Defocus as a Special Case of the Transport of Intensity Equation
2021 IEEE International Conference on Computational Photography (ICCP), 2021The Transport of Intensity Equation (TIE) in microscopy and the Depth from Differential Defocus (DfDD) method in photography both describe the effect of a small change in defocus on image intensity. They are based on different assumptions and may appear to contradict each other.
Emma Alexander +3 more
openaire +1 more source
An iterative compensation solution to the transport-of-intensity equation
Advanced Optical Imaging Technologies III, 2020In 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 +4 more
openaire +1 more source
Multigrid Algorithm Based on Transport of Intensity Equation
ACTA PHOTONICA SINICA, 2013Multigrid algorithm based on the transport of intensity equation is researched to retrieval phase information from the intensity measurement.Given initial value and stared from the coarsest grid,a solution is obtained by calculating;regarded it as the finest initial value,an approximate solution is obtained by calculating;then its residual is ...
刘红 LIU Hong +3 more
openaire +1 more source
Phase Retrieval Based on Transport-of-intensity Equation
ACTA PHOTONICA SINICA, 2011Phase retrieval based on the transport-of-intensity equation is researched to calculate phase information from the intensity measurement.A practical phase retrieval system is designed including classic Fourier phase retrieval algorithm and phase retrieval algorithm based on the total variation.Only measurements of the spatial intensity of the optical ...
程鸿 CHENG Hong +3 more
openaire +1 more source