paraxial

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Related to Paraxial approximation: paraxial rays

par·ax·i·al

(par-ak'sē-ăl),
By the side of the axis of any body or part.

paraxial

[perak′sē·əl]
pertaining to an organ or other structure located near the axis of the body.

par·ax·i·al

(par-ak'sē-ăl)
By the side of the axis of any body or part.

paraxial 

Pertains to light rays situated near enough to the axis of an optical system for the gaussian theory to apply. See gaussian theory.
References in periodicals archive ?
Therefore, here the procedure is performed beyond the paraxial approximation.
As no paraxial approximation is used, the electromagnetic fields of the elegant Laguerre-Gaussian beam propagating in free space are derived beyond the paraxial approximation.
40,41], the electromagnetic fields are treated within the framework of the paraxial approximation.
Also, for ultrashort laser pulse, the numerical calculation of the NLS in the Kerr medium must go beyond the paraxial approximation.
Propagation of Hermite-Gaussian-beams beyond the paraxial approximation," Optics Commun.