Ray mapping method for off-axis and non-paraxial freeform illumination lens design

The ray mapping method for freeform illumination design is an easy and flexible method, but only in the paraxial regime does it result in surface normal fields that are directly integrable into continuous freeform surfaces that provide the desired illuminance distribution. A new mapping scheme is pr...

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Veröffentlicht in:	Optics letters 2019-02, Vol.44 (4), p.771-774
Hauptverfasser:	Desnijder, Karel, Hanselaer, Peter, Meuret, Youri
Format:	Artikel
Sprache:	eng
Schlagworte:	Coordinates Fields (mathematics) Illuminance Illumination Lens design Luminance distribution Mapping
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description	The ray mapping method for freeform illumination design is an easy and flexible method, but only in the paraxial regime does it result in surface normal fields that are directly integrable into continuous freeform surfaces that provide the desired illuminance distribution. A new mapping scheme is proposed to alter an initial source-target mapping via a symplectic flow of an equi-flux parametric coordinate system. The resulting mapping provides integrable surface normal vector fields for complex off-axis and non-paraxial illumination problems, as demonstrated by two freeform lens examples.
doi_str_mv	10.1364/OL.44.000771
format	Article
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source	OSA_美国光学学会数据库1
subjects	Coordinates Fields (mathematics) Illuminance Illumination Lens design Luminance distribution Mapping
title	Ray mapping method for off-axis and non-paraxial freeform illumination lens design
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