Launch angle 41308 181732274 2008-01-02T23:19:51Z Srleffler 252195 rv nonsense/irrelevant/ non-article per [[WP:MOSDAB]]. In [[fiber optics|fiber optic]] [[telecommunication]]s, the '''launch angle''' has the following meanings: *The angle, with respect to the normal, at which a [[light]] [[line (mathematics)|ray]] emerges from a surface. *The [[beam divergence]] at an emitting surface, such as that of a [[light-emitting diode]] (LED), [[laser]], [[lens (optics)|lens]], [[Prism (optics)|prism]], or [[optical fiber]] end face. *At an end face of an optical fiber, the angle between an input ray and the [[fiber axis]]. If the end face of the fiber is perpendicular to the fiber axis, the launch angle is equal to the [[angle of incidence]]. [[Category:Fiber optics]]