Flexible optical fibre transmitting polychromatic beams - has refractive profile such that convergence angle at input and divergence angle at output are practically independent of wavelength

摘要

The flexible optical fibre consists of a core and a cover and is intended for a region of the spectrum in which the ratio of the largest to the smallest wave length is 1.2. The profile of the refractive index in the core is defined by a set of equations, depending on the value of the radius from the centre of the core and the variation of the index with this value as shown on simple graphs. USE/ADVANTAGE - Simple design with simple refractive index profile. Suitable for optical communuications systems.