# Design of high-efficient freeform LED lens for illumination of elongated rectangular regions.

@article{Moiseev2011DesignOH, title={Design of high-efficient freeform LED lens for illumination of elongated rectangular regions.}, author={Mikhail A. Moiseev and Leonid L. Doskolovich and Nikolay Lvovich Kazanskiy}, journal={Optics express}, year={2011}, volume={19 Suppl 3}, pages={ A225-33 } }

We propose a method for the design of an optical element generating the required irradiance distribution in a rectangular area with a large aspect ratio. Application fields include streetlights, the illumination of halls or corridors, and so forth. The design assumes that the optical element has a complex form and contains two refractive surfaces. The first one converts a spherical beam from the light source to a cylindrical beam. The second one transforms an incident cylindrical beam and…

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