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:
Aug. 11, 1992
Filed:
Apr. 05, 1991
Applicant:
Inventor:
Carl A Chiulli, Randolph, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
437129 ; 437127 ; 437173 ; 437905 ; 148D / ; 148D / ;
Abstract
The electromagnetic radiation output from a solid-state radiation emitter is adjusted by covering at least part of the emission surface with an absorber material which absorbs the radiation emitted from the emitter, and directing a beam of radiation from outside the radiation emitter on to the absorber material so as to ablate at least part of the absorber material from the emission surface, or render at least part of the absorber material transmissive of the electromagnetic radiation from the emitter. The process is especially useful for equalizing the outputs from an array of emitters, such as a bar of light emitting diodes.