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. 13, 1976
Filed:
Mar. 07, 1975
Applicant:
Inventors:
Yoh Mita, Tokyo, JA;
Eiji Nagasawa, Tokyo, JA;
Assignee:
Nippon Electric Co., Inc., Tokyo, JA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 17 ; 357 74 ; 357 18 ; 350-1 ;
Abstract
A light source having an infrared-emitting diode and a luminescent material excitable in a step-like manner for converting the infrared radiation to visible rays comprises an optical cavity enclosing the luminescent material. A portion of the cavity wall is a dichroic filter that is substantially transparent to the visible rays but reflects the infrared radiation. The other cavity wall reflect the infrared radiation in particular.