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. 11, 2004
Filed:
May. 06, 2002
Yuichi Komachi, Tokyo, JP;
Katsuo Aizawa, Kanagawa, JP;
Machida Endoscope Co., Ltd., Tokyo, JP;
Abstract
A hollow optical fiber has an intermed ate dielectric layer interposed between an inner periphery side dielectric layer facing a hollow core portion and a metal layer The inner periphery side dielectric layer is formed of calcium fluoride. The intermediate dielectric layer is formed of yttrium fluoride. Metal of the metal layer can be prevented from dispersing into the dielectric layers by the intermediate dielectric layer formed of yttrium fluoride. The hollow optical fiber is manufactured by vapor depositing calcium fluoride on an outer peripheral surface of an acid-soluble glass tube (base material), then vapor depositing yttrium fluoride on its outer peripheral surface, then vapor depositing a metal layer formed of silver, gold or the like on its outer peripheral surface, and thereafter, dissolving the glass tube with acid.