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paraxial

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par·ax·i·al (p-rks-l)
adj.
Located alongside of the axis of a body or part.
paraxial
[perak′sē·əl]
pertaining to an organ or other structure located near the axis of the body.
paraxial 
Pertains to light rays situated near enough to the axis of an optical system for the gaussian theory to apply. See gaussian theory.
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Its paraxial placing, eroding and scrutinizing the 'real', constitutes in Helene Cixous's phrase, 'a subtle invitation to transgression'" (Fantasy 180).
Las damas del fin del mundo o la novela historico-fantastica femenina by Trigo, Beatriz / Hispanofila
A plane aperture is assumed, which implies that the source must be distant as well as paraxial ([r.
Issues in optical diffraction theory by Mielenz, Klaus D. / Journal of Research of the National Institute of Standards and Technology
When the laser rays enter the sample they suffer refraction, and the marginal rays are focused deeper than the paraxial rays, an effect known as spherical aberration.
Raman spectroscopy in coatings research and analysis: Part I. Basic ... by Everall, Neil J. / JCT CoatingsTech
 
 
 
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