Abstract
A new method based on the theory of compound parabolic concentrator(CPC),the edge-ray principle and the off-axis rays tracing theory in geometrical optics is proposed to design a reflector for big size LED to generate uniform illumination in a certain range of angle.The structure of LED reflector can be quantitative deduced by using this method to achieve high energy efficiency and uniformity.Simulating in the optical design software ZEMAX shows that the method is reasonable.
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