The Influence of the Parabolic Reflector Characteristic Parameters on the Illuminance of the LED Light
Yu RongBin
Wang Bao
Li Fengguo
Abstract：In order to meet the lighting needs , the multi-LED light sources and the parabolic reflector are usually applied in the ordinary LED lighting .Taking 9-LED light source as an example , the influences of the parabolic reflector characteristic parameters on the illuminance of the illuminated target plane are discussed .The results show that , for the fixed reflector length , the smaller focal length , the better is the effect of light gathering .For the fixed reflector aperture , the illuminance shape gradually changes from speckle to halo and the illuminance at the central region gradually decreases with the increase of the focal length.When the reflector focal length is fixed , the illuminance at edge region slightly decreases and the illuminance at central region position is almost constant with the decrease of the diameter .With the frosted glass installed at the aperture plane , the illuminance of the whole target plane significantly decreases and the illuminance distribution is more uniform .However, the increase in number of LED light source only increases the illuminance .
Keywords：multi-LED light sourcesparabolic reflectorparametersilluminance distribution
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 66-70,119 )