Smooth light extraction in lighting optical fibre



Downloads per month over past year

Álvarez Fernández-Balbuena, Antonio and Vázquez Molini, Daniel and García Botella, Ángel and Martínez Antón, Juan Carlos and Bernabeu Martínez, Eusebio (2011) Smooth light extraction in lighting optical fibre. In Illumination Optics II. Proceedings of Society of Photo-Optical Instrumentation Engineers (SPIE) (8170). Society of Photo-Optical Instrumentation Engineers (SPIE). ISBN 978-0-81948-796-4

Official URL:


Recent advances in LED technology have relegated the use of optical fibre for general lighting, but there are several applications where it can be used as scanners lighting systems, daylight, cultural heritage lighting, sensors, explosion risky spaces, etc. Nowadays the use of high intensity LED to inject light in optical fibre increases the possibility of conjugate fibre + LED for lighting applications. New optical fibres of plastic materials, high core diameter up to 12.6 mm transmit light with little attenuation in the visible spectrum but there is no an efficient and controlled way to extract the light during the fibre path. Side extracting fibres extracts all the light on 2π angle so is not well suited for controlled lighting. In this paper we present an extraction system for mono-filament optical fibre which provides efficient and controlled light distribution. These lighting parameters can be controlled with an algorithm that set the position, depth and shape of the optical extraction system. The extraction system works by total internal reflection in the core of the fibre with high efficiency and low cost. A 10 m length prototype is made with 45° sectional cuts in the fibre core as extraction system. The system is tested with a 1W white LED illuminator in one side.

Item Type:Book Section
Additional Information:

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
Illumination Optics (2ª. 2011. Marsella, Francia).

Uncontrolled Keywords:Compound Parabolic Concentrator, Nonimaging Optics, Natural Lighting, Prismatic Film, Daylight, Hollow Light Guide
Subjects:Sciences > Physics > Optics
ID Code:26175
Deposited On:16 Jul 2014 11:50
Last Modified:14 Feb 2022 09:17

Origin of downloads

Repository Staff Only: item control page