کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
739425 | 1461642 | 2014 | 6 صفحه PDF | دانلود رایگان |
• We introduced a contour calculation method for LED-based freeform reflector.
• We use 6400 ellipsoid patches to establish a freeform reflector.
• The freeform reflector illuminates a square illumination distribution.
• The designed freeform reflector offers high uniformity and tolerance.
• The computation time of the freeform reflector is just 18.5 s.
This paper presents a contour calculation method (CCM) for the freeform reflector design. Conservation of energy relates the light flux from a Lambertian-type point source to a desired irradiance and a discrete spot distribution on a target plane. This relationship determines the edges of the reflector patches, thus, enabling the design of a non-imaging freeform reflector based on a series of ellipsoid patches modeled as NURBS curves in Rhinoceros. As an example, we present a freeform reflector design composed of 6400 ellipsoid patches to illuminate a surface with 94% uniformity. A computer calculation takes 18.5 s.
Journal: Optics & Laser Technology - Volume 56, March 2014, Pages 430–435