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:
Nov. 12, 1985
Filed:
Mar. 11, 1983
Applicant:
Inventors:
Kazuhito Murakami, Osaka, JP;
Kenichi Takahashi, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9630 ; 350 9629 ; 350 9633 ; 350 9634 ; 65-2 ; 65-31 ; 65-311 ; 65-32 ; 427160 ; 427162 ;
Abstract
An infrared fiber is obtained in which a core crystal fiber for transmitting infrared rays is inserted in a cladding crystal pipe having a smaller refractive index than the core crystal fiber and in which the interface between the core and pipe is held smooth. This infrared fiber can effectively be prepared by inserting a core crystal fiber in a cladding crystal pipe and then subjecting the inserted pipe to a drawing working through a die.