Results 261 to 270 of about 385,686 (292)

Linear axicons in partially coherent light

Optical Engineering, 1995
With uniform partially coherent illumination of a sufficiently small coherence width, linear holographic axicons produce an extended axial line image of a desired length and a nearly uniform intensity. This result is demonstrated by numerical diffractive simulations based on generalized axicon phase functions and the space-frequency theory of optical ...
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Uncertainty principle for partially coherent light

Journal of the Optical Society of America, 1983
Two intensity functions are introduced for partially coherent light: one in a space domain and a second one in a spatial-frequency domain. Moreover, a quantity is defined that can be considered a measure of the overall degree of coherence of the partially coherent light.
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Propagation of Partially Coherent Light Pulses

Optica Acta: International Journal of Optics, 1986
The propagation of light pulses with partial spatial and temporal coherence is analysed. It is shown that the introduction of the second-order coherence function enables the description of both spatial and temporal radiation characteristics to be described in the angular spectrum approach.
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Phase imaging with partially coherent light

SPIE Proceedings, 2013
We review several quantitative phase imaging methods that retrieve phase from a through-focus series of intensity images (specifically, iterative methods and Transport of Intensity) and compare their performance when using partially coherent illumination, such as in the case in a brightfield microscope or X-ray imaging system.
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Design of diffractive axicons for partially coherent light

Optics Letters, 1998
We propose a novel method of designing diffractive axicons for use in spatially partially coherent illumination. The design procedure is based on the results obtained by the stationary-phase method. The technique leads to a coherence-dependent differential equation with appropriate boundary conditions for the axicon phase function.
S Y, Popov, A T, Friberg
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Real-time image recognition by partially coherent light

Applied Optics, 1986
A real-time image recognition system that can perform complex signal detection under partially coherent illumination is presented. The unique features of the correlator are that the target under study may be a diffusely illuminated real object, and the real-time correlation signal is produced using a narrowband extended light source. The system employs
B, Javidi, F T, Yu
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Coherence vortices in Mie scattered partially coherent light

2017
Although the fields of coherence optics and Mie scattering have been separately subjected to extensive investigations for some time, no work has been carried out combining these two hitherto distinct concepts. In particular, despite the fact that many scientists have performed numerous studies on optical singularities in various systems, no work is ...
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The Wigner Distribution Function of Partially Coherent Light

Optica Acta: International Journal of Optics, 1981
The concept of the Wigner distribution function is applied to stochastic signals, in particular to partially coherent light. Relations between the Wigner distribution function, the power spectrum and related subjects are formulated. Some inequalities for the Wigner distribution function are derived; one of these inequalities leads to the definition of ...
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A roadmap for the commercialization of perovskite light emitters

Nature Reviews Materials, 2022
, Richard Friend, Edward H Sargent
exaly  

Planning for post‐pandemic cancer care delivery: Recovery or opportunity for redesign?

Ca-A Cancer Journal for Clinicians, 2021
Pelin Cinar, Daniela A Bota, Kathryn A Gold   +2 more
exaly