paraxial

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paraxial

(pă-raks -ee-ăl) Lying close to the optical axis of a lens, mirror, or system of such elements.

paraxial

[par′ak·sē·əl]
(science and technology)
Lying near the axis.
References in periodicals archive ?
The Fresnel-Fraunhofer transform presents a restriction inherited from the paraxial approximation performed on the Fresnel-Kirchhoff integral, where the condition [z.
A solution may consist in using the plane wave spectrum of CGBs introduced in [17], or alternatively in performing an asymptotic evaluation of the radiation integrals with another approximation such as the paraxial approximation.
Moreover, we treat the elegant Laguerre-Gaussian beam beyond the paraxial approximation.
Lencina, "Limits of the paraxial approximation in laser beams," Opt.
The propagation of a light beam in a Kerr medium, under the paraxial approximation, can be described by the NLS equation: