The half-angle of the cone (a) within which incident light is totally internally reflected inside the fiber's core. It is equal to sin-1( NA).
The maximum angle within which light will be accepted by an element, such as a detector or waveguide. In the latter, it is quantified as half the vertex angle of the cone within which optical power may be coupled into bound modes of a fiber. Also called acceptance cone. Learn more about Acceptance Angle...
The half-angle of the cone within which all incident light is totally internally reflected by the fibre core. For graded-index fibres, acceptance angle is a function of position on the entrance face of the core.
The angle over which the core of an optical fiber accepts incoming light. It is usually measured from the axis. Related to numerical aperture (NA).
The angle at which the core of the fiber will take in light.
The maximum angle to the axis (centre line) of an optical fibre at which a light ray will enter the core and be propagated. Light striking the optical fibre at an angle greater than the Acceptance Angle will be lost.
