Freeform optical structures for direct-lit applications
AssigneeJoanneum Research Forschungsgesellschaft mbH
InventorsChristian Sommer, Claude Leiner
Life of this patent
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Abstract
An optical apparatus with a distance-to-height ratio, DHR, greater than 2, operable to emit light with a homogenized radiance distribution, the apparatus comprising a plurality of light sources, arranged in an array, a diffusor device at an exit surface of the apparatus, a transparent substrate, arranged between the plurality of light sources and the exit surface, the substrate comprising a plurality of freeform, FF, optical structures wherein the freeform structures are arranged on a bottom side of the transparent substrate facing the light sources.
Claims17
An optical apparatus with a distance-to-height ratio (DHR) greater than 2, operable to emit light with a homogenized radiance distribution, the apparatus comprising:
- a plurality of light sources, arranged in an array;
- a diffusor device at an exit surface of the apparatus;
- a transparent substrate, arranged between the plurality of light sources and the exit surface, the substrate comprising a plurality of freeform (FF) optical structures wherein the freeform structures are arranged on a bottom side of the transparent substrate facing the light sources.
A method for manufacturing flat freeform (FF) micro optical structures for direct-lit applications on a substrate to provide a homogenous irradiance distribution of light on a diffusor device, wherein the light is emitted by a plurality of light sources, the method comprising:
- calculating, by an FF algorithm, a geometry of each of the plurality of FF structures on the substrate.
Dependencies are inferred from the claim text.