Abstract
Based on principle of edge ray and etendue conservation ideas,the compound parabolic concentrator and freeform lens collimator were designed for high power Light Emitting Diode extended source.By using TracePro software for ray tracing simulation and experimental guidance,a light radiation simulator with uniform illumination output was developed.The divergence angle of simulator output light beam is measured as ±0.2rad.In the lightscreen of 50 cm distance the beam horizontal uniformity is measured better than 4.1%,and longitudinal uniformity better than 3.8%,within 14cm×14cm size illuminated area.
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