도광판에 적용하기 위한 플라스틱 광섬유 측면 발관 광원의 특성분석

Abstract

In this study, we suggested optical source replacing conventional LED source, which is widely used for light guide panel. In the case of LED source, multiple sources are required. That increases electrical consuming power and provides instability of light emitting intensity. These factors make the performance light guiding panel deteriorate. To solve these problems, alternative for the light source emitting from the side of the light guiding panel using continuous waveguide have been studied. We present a solution which utilizes plastic optical fiber and laser processing method used in light guide panel processing. Before experiment, simulation was performed with plastic optical fiber source model. Based on simulation results, best model resulting in uniform illumination was selected and applied to laser processing of the fiber. Optical coherence tomography was used to image cross section of laser processed plastic optical fiber, which explained the deviation between simulation results for modeled ones and light emitting characteristics obtained from laser processed samples. Additional simulation to provide optimized processing condition can Improve uniformity of the fiber source. Realtime monitoring with optical coherence tomography during adjusting processing depth and inter-distance will enhance utility of the light source for light guiding panel.