Patent · US Active

Dichroic patterning for subtractive color mixing

US10605421B2 · kind B2 · utility

0Cited by

4References

20Claims

0Family size

Assignee

ROBE lighting s.r.o. · CZ

Inventors

Pavel Jurik · Prostřední Bečva, CZ
Jan Vilem · Vsetín, CZ
Josef Valchar · Prostřední Bečva, CZ

Key dates

Filing date	Aug 27, 2018
Grant date	Mar 31, 2020
Priority date	—
Expiry date	Aug 31, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG02B27/147
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A color wheel for use in an automated luminaire includes a transparent substrate and a patterned dichroic filter coating on the transparent substrate. The pattern includes a first region and a second region. The first region includes unconnected coated dots, most of the coated dots having a substantially equal first size. The coated dots vary in density from a lower density at a first end of the first region to a higher density at a second end of the first region. The second region includes a contiguous dichroic filter coating that includes unconnected uncoated holes, most of the uncoated holes having a substantially equal second size. The uncoated holes vary in density from a higher density at a first end of the second region to a lower density at a second end of the second region. The first end of the second region abuts the second end of the first region.

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