US 11,703,207 B2
Lighting device and stage light fixture comprising a plurality of such lighting devices
Marco Angelini, Trivolzio (IT); Aris Quadri, Seriate (IT); Alberto Alfier, Vedelago (IT); Renato Frison, Chions (IT); and Davide Ferrati, Brembate (IT)
Assigned to CLAY PAKY S.p.A., Seriate (IT)
Filed by OSRAM GmbH, Munich (DE); and CLAY PAKY S.p.A, Seriate (IT)
Filed on May 3, 2022, as Appl. No. 17/735,580.
Claims priority of application No. 102021000011456 (IT), filed on May 5, 2021.
Prior Publication US 2022/0357016 A1, Nov. 10, 2022
Int. Cl. F21V 7/00 (2006.01); F21V 7/07 (2006.01); F21V 7/06 (2006.01); F21V 8/00 (2006.01); F21W 131/406 (2006.01)
CPC F21V 7/0033 (2013.01) [F21V 7/06 (2013.01); G02B 6/0008 (2013.01); F21W 2131/406 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lighting device that produces scenic effects comprising:
a light source assembly;
a light guide extending along a longitudinal axis and coupled to the light source assembly that defines a defined optical path;
a primary mirror arranged along the longitudinal axis facing the light source assembly to reflect the light beam coming out from the light guide; and
a secondary mirror facing the primary mirror to reflect the light beam reflected by the primary mirror towards an emission area surrounding the primary mirror,
wherein a primary reflecting surface of the primary mirror has at least one first portion having a first hyperbolic shape or a first aspherical shape of even order and degree equal to or greater than four and a secondary reflecting surface of the secondary mirror has at least one second portion having a second hyperbolic shape or a second aspherical shape of even order and degree equal to or greater than four, and
the primary mirror is surrounded by a hood element, which diverges towards the light source assembly and is configured to prevent loss of light radiation.