Glossary

Multimode fiber optic: fiber optic enabling the propagation of several transverse modes
Aperture : diaphragm limiting the number of light rays that are able to propagate
Lens: optical component with two refractive surfaces axially symmetrical for redirecting the light in a controlled manner
Effective focal length: algebraic distance from the primary/secondary principal plane of an optical system to its front/back focal plane
Core: central part of a fiber optic in which lightwaves are guided
Fiber optic: long cylindrical optical component guiding light
Clear aperture: aperture diameter of an optical system
Coupling efficiency ( fiber optics ): ratio between the optical power emitted by a source and the optical power effectively injected in a fiber optics