fresnel number - Axtarish в Google
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The Fresnel number (F), named after the physicist Augustin-Jean Fresnel, is a dimensionless number relating to the pattern a beam of light forms on a surface
The Fresnel number is a parameter determining the regime of diffraction effects.
Fresnel number Fresnel number
В оптике, в частности в теории скалярной дифракции, число Френеля, названное в честь физика Огюстена-Жана Френеля, представляет собой безразмерное число, относящееся к рисунку, который луч света образует на поверхности при проецировании через... Википедия (Английский язык)
In summary, the Fresnel number is an important measure indicating the ratio of geometrical and diffraction effects on the beam propagation. The Fresnel number ...
The Fresnel number is the difference, expressed in half-wavelengths, between the slant distance from the observation point to the edge of the aperture and ...
In general, Fresnel diffraction is valid if the Fresnel number is approximately 1. For Fresnel diffraction the electric field at point ( x , y , z ) ... Fresnel number · Fraunhofer diffraction · Kirchhoff's diffraction formula
For this aim, the concept of Fresnel number, proportional to the linear gain, is introduced as a convenient parameter for characterizing focused sources. It is ...
have chosen to redefine the Fresnel number N. The Fresnel number is the number of Fresnel half-period zones between the paraxial and marginal rays (measured ...
We demonstrate the existence of a low-Fresnel-number regime, N<10, in which axicons with Gaussian illumination can generate energy-efficient Bessel beams with a ...
The essence of the Fresnel number is the variation of the optical path in the propagation; the physical meaning is the number of Fresnel half-wave zones ...
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