레이저 가공패턴에 따른 플라스틱 광섬유 측면 발광휘도 특성에 관한 연구

Abstract

In this paper, we proposed a new light source for utilization in liquid crystal display. Light emitted from the side of laser-processed plastic optical fiber(POF) showed high illumination near the light source that resulted in lose of uniformity overall the POF. To overcome this problem, scatterer pattern on the POF was inscribed by using CO2 laser, which intended to induce uniform illumination along the processed POF. Prior to experimental implementation, we designed scatterer pattern and carried out simulation with it for evaluation of illumination performance from the side-emitting POF. In experiment, LED having divergence angle of 30° was placed an end of the POF and modeled pattern was fabricated on the POF. Using this experimental setup, we measured the illumination performance of the POF. With changing the design parameters, we want to make uniform illumination from the POF. From the simulation, proper fabrication conditions for scatterer patterning could be determined. Determined parameters was used for the implementation of side-processed POF with the CO2 laser, and measured experimental results of the illumination proved the feasibility of the simulation in the scatterer's pattern design.