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Abstract
According to the principle of geometrical optics, a LED collimating light source based on surface model is designed. First, establish a collimator lens mathematical model, then the single light-emitting diode model and the light model were imported into Tracepro software for simulation verification. At last the influence of the size of light-emitting diode on the half - intensity angle and the luminous efficiency were analyzed. The results show that the collimating lens control the halfintensity angle of the light-emitting diode source under 3 degrees. The luminous efficiency of the collimating lens is about 90.6% under consideration of material absorption and other losses.
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