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:
Oct. 07, 1997
Filed:
May. 26, 1995
John M Davenport, Lyndhurst, OH (US);
Mark E Duffy, Shaker Heights, OH (US);
Richard L Hansler, Pepper Pike, OH (US);
Kenneth S King, Willoughby Hills, OH (US);
William J Cassarly, Richmond Heights, OH (US);
Thomas G Parham, Gates Mills, OH (US);
Gary R Allen, Chesterland, OH (US);
James T Dakin, Shaker Heights, OH (US);
Frederic F Ahlgren, Euclid, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A lamp-to-light guide coupling arrangement includes an electrodeless high intensity discharge lamp comprising an arc tube with an ionizable fill, and an excitation circuit for electrically exciting the ionizable fill to induce therein a light-producing arc discharge. The coupling arrangement further includes a coupling device comprising a generally tubular, hollow body that has an inlet end for receiving light from the arc discharge and a larger, outlet end. The coupling device further comprises an interiorly directed reflector on a surface of the hollow body for reflecting visible light. Such coupling device is shaped so as to receive light at one solid angle over an area of the inlet end and to transmit light at a smaller solid angle but over a larger area of the outlet end. The coupling device is preferably formed from dielectric material. The reflector preferably comprises a refractory optical interference filter.