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:
Apr. 03, 1990
Filed:
Jul. 28, 1989
Egbertus J Maassen, Eindhoven, NL;
Franciscus A Van Meel, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The luminaire comprises a cup-shaped reflector having facets which are curved continuously and extend from the light emanating aperture of the reflector towards the reflector axis. The facets of the reflector, in planes transverse to the reflector axis, are straight and constitute a regular polygon. The luminaire further comprises a circumferential light-absorbing collar which has a portion which narrows from the reflector edge in a stepwise manner. The luminaire together with an axially accommodated light source provides a wide, homogeneous, sharply bounded beam and at small angles with the axis. It is no longer observable as a source of light.