The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 2018
Filed:
Dec. 24, 2014
Philips Lighting Holding B.v., Eindhoven, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
Disclosed is an optical element () comprising a central cavity () extending from a first aperture () to a second aperture () of the optical element, said central cavity gradually widening in a direction from the first aperture to the second aperture, said central cavity being delimited by a stack of transparent frustums () including a first frustum defining the first aperture and a final frustum defining the second aperture, each frustum having a prismatic outer surface () having a first surface portion () tapering in the direction from the second aperture to the first aperture and a continuous inner surface (), wherein the respective continuous inner surfaces combine to delimit said central cavity. Also disclosed is a lighting device including such an optical element and a luminaire including such a lighting device.