| 摘要 |
A light-emitting device including a light source (3) placed at the end of an optical fibre. The fibre's sheath comprises defined areas (4, 6, 8, 10, 12) of concentrated and deliberately added impurities, which areas are formed using conventional microelectronics doping processes such as diffusion and ion implantation allowing the refractive index to be varied in said areas so that said index, which is different in each area, is higher than that of the core, whereby an optical filter is formed through which light of a single colour escapes in a controlled manner. The device is designed for luminescent textiles and all kinds of luminous accessories, and is also applicable to computer screens and other visual interfaces. |
