5. Glossary

rayon de gorge; waist

Commonly used Anglicism meaning "neck" (constriction) of the bundle.

fine lens; tiny lens

The thickness of the lens is small compared to the difference between its two radii of curvature.

optique paraxiale; paraxial optics

Optics of centered optical devices in which light rays remain close to the optical axis.

transfer matrix; matrice de transfert

Two-dimensional matrix giving the coordinates of a light ray at the output from those at the input of an optical device.

laser; laser (Light Amplification by Stimulated Emission of Radiation)

A device for amplifying light by stimulated emission of radiation.

texture; texture...