US 12,474,040 B2
Lens for an ingress protected stage luminaire
Jan Vilem, Valasske Mezirici (CZ); Tomas David, Podoli (CZ); Tomas Micunek, Roznov pod Radhostem (CZ); and Josef Valchar, Prostredni Becva (CZ)
Assigned to ROBE lighting s.r.o., Roznov pod Radhostem (CZ)
Filed by ROBE lighting s.r.o., Roznov pod Radhostem (CZ)
Filed on Mar. 28, 2024, as Appl. No. 18/620,146.
Claims priority of provisional application 63/493,230, filed on Mar. 30, 2023.
Prior Publication US 2024/0240783 A1, Jul. 18, 2024
Int. Cl. F21V 31/00 (2006.01); F21V 5/04 (2006.01); F21V 21/30 (2006.01); F21V 29/50 (2015.01)
CPC F21V 31/005 (2013.01) [F21V 5/045 (2013.01); F21V 21/30 (2013.01); F21V 29/50 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A lens assembly, comprising:
a lens holder;
a Fresnel lens physically coupled to the lens holder to allow airflow around the Fresnel lens, the Fresnel lens including a smooth rear face and a front face comprising annular facets; and
a homogenizing lens physically coupled to the lens holder and optically coupled to the Fresnel lens, the homogenizing lens including a rear face comprising a homogenizing optical structure, the rear face of the homogenizing lens facing the front face of the Fresnel lens, wherein the homogenizing lens is physically coupled to the lens holder to reduce airflow around an edge of the homogenizing lens,
wherein the lens holder is configured to hold the Fresnel lens and the homogenizing lens in a fixed and spaced-apart relationship and to allow airflow between the Fresnel lens and the homogenizing lens.