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:
Mar. 01, 1988
Filed:
Nov. 09, 1981
Peter J Walsh, Stirling, NJ (US);
Duro-Test Corporation, North Bergen, NJ (US);
Abstract
An incandescent lamp of the reflector type has an exit window on which a filter coating is located. The filter coating reflects infrared radiation and transmits visible radiation. The clamp also has a reflector which is opposed to the filter coating and which reflects both infrared and visible radiation. The filter coating and the reflector have surfaces which are parabolic, confocal, and orthogonal. The filament passes through the focus and is elongated along the focal axis of the lamp. Infrared radiation emitted by the filament from the focus is reflectd back to it after two reflections, of which one reflection will be off the filter coating and of which the other will be off the reflector. A large part of the light produced by the lamp is collimated.