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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