23 September 2015 Practical optical design of an LED collimator
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Abstract
We present a detailed investigation of an optical system which couples the light of a Lambertian Source (for example, a high power LED array) to an equal etendue target. Such a system can be applied for gobo illumination or for illuminating a lightguide. Though the efficiency of such a system may by ideal in theory, real-world constraints make it imperfect. The actual light collection angle by the target may play a role, and requirements such as the clearance between the optics and source or target and the maximum system diameter will have an influence on imaging and non-imaging designs. As for some applications an uniform illumination of the target may be required, we finally analyze the ability of various designs to deliver homogeneity.
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H. Rehn, H. Rehn, } "Practical optical design of an LED collimator", Proc. SPIE 9629, Optical Systems Design 2015: Illumination Optics IV, 962907 (23 September 2015); doi: 10.1117/12.2191217; https://doi.org/10.1117/12.2191217
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