Patent · US Active

Freeform optical structures for direct-lit applications

US10955701B2 · kind B2 · utility

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0References

6Claims

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Assignee

JOANNEUM RESEARCH FORSCHUNGSGESELLSCHAFT MBH · AT

Inventors

Christian Sommer · Nussbaumen, CH
Claude Leiner · Graz, AT

Key dates

Filing date	Apr 1, 2019
Grant date	Mar 23, 2021
Priority date	—
Expiry date	Apr 1, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133607
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.