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:
May. 06, 1980
Filed:
Jun. 26, 1978
Applicant:
Inventors:
George H Thompson, Sawbridgeworth, GB;
Peter R Selway, Sawbridgeworth, GB;
Assignee:
International Standard Electric Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9631 ; 350 9620 ; 350 9615 ;
Abstract
A short length of step index fibre is placed in front of graded index fibre. Walls of the step index fibre form multiple images of its entrance face which are imaged by the graded index fibre to give a more nearly uniform illumination of the graded index fibre and thereby avoid the variable loss properties which can result from the repetitive focusing produced by point illumination or well collimated illumination.