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:
Dec. 30, 1980
Filed:
Dec. 26, 1978
Applicant:
Inventor:
Henricus M van Ass, Hillegom, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; C03C / ;
U.S. Cl.
CPC ...
65 / ; 65-2 ; 65 3 / ; 350 9631 ; 350 9634 ;
Abstract
When producing a glass fiber, having a graded refractive index profile, by means of the double crucible method, the initial materials being core and cladding glass compositions having mutually different alkali ions, a profile is usually obtained which greatly deviates from the desired parabolic form. The invention furnishes the possibility of approximating this parabolic form very closely. This is attained by a partial substitution of the core alkali ion by the cladding alkali ion.