Calculating model of light transmission efficiency of diffusers attached to a lighting cavity

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50957

Title:	Calculating model of light transmission efficiency of diffusers attached to a lighting cavity
Authors:	Sun,CC;Chien,WT;Moreno,I;Hsieh,CT;Lin,MC;Hsiao,SL;Lee,XH
Contributors:	光電科學與工程學系
Keywords:	BACKLIGHT;IRRADIANCE;LEDS
Date:	2010
Issue Date:	2012-03-27 18:13:52 (UTC+8)
Publisher:	國立中央大學
Abstract:	A lighting cavity is a reflecting box with light sources inside. Its exit side is covered with a diffuser plate to mix and distribute light, which addresses a key issue of luminaires, display backlights, and other illumination systems. We derive a simple but precise formula for the optical efficiency of diffuser plates attached to a light cavity. We overcome the complexity of the scattering theory and the difficulty of the multiple calculations involved, by carrying out the calculation with a single ray of light that statistically represents all the scattered rays. We constructed and tested several optical cavities using light-emitting diodes, bulk-scattering diffusers, white scatter sheets, and silver coatings. All measurements are in good agreement with predictions from our optical model. (C) 2010 Optical Society of America
Relation:	OPTICS EXPRESS
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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