US Patent No. 10,605,421

DICHROIC PATTERNING FOR SUBTRACTIVE COLOR MIXING


Patent No. 10,605,421
Issue Date March 31, 2020
Title Dichroic Patterning For Subtractive Color Mixing
Inventorship Pavel Jurik, Prostredni Becva (CZ)
Jan Vilem, Vsetin (CZ)
Josef Valchar, Prostredni Becva (CZ)
Assignee Robe Lighting s.r.o., Roznov pod Radhostem (CZ)

Claim of US Patent No. 10,605,421

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