Optical transmission element

Patent metadata

Field	Value
Publication number	US-9507083-B2
Application number	US-201615130068-A
Country	US
Kind code	B2
Filing date	Apr 15, 2016
Priority date	Dec 13, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An optical transmission element according to an embodiment comprises a fiber and a covering layer. The fiber includes a core made of glass and a cladding made of glass covering an outer periphery of the core. The covering layer covers an outer periphery of the cladding and includes a plurality of alkyl groups which are not fluorine-substituted wherein each of the alkyl groups is bonded to the cladding via a siloxane bond and wherein the alkyl groups are represented by CH 3 (CH 2 ) n — wherein m is an integer of 7 or more.

First claim

What is claimed is:

1. An optical transmission element comprising:
a fiber including a core made of glass and a cladding made of glass covering an outer periphery of the core; and
a covering layer covering an outer periphery of the cladding and including a plurality of alkyl groups which are not fluorine-substituted wherein each of the alkyl groups is bonded to the cladding via a siloxane bond,
wherein the alkyl groups are represented by CH 3 (CH 2 ) m — wherein m is an integer of 7 or more.

2. The optical transmission element according to claim 1 , wherein the fiber and the covering layer are free of lead.

3. The optical transmission element according to claim 1 , further comprising a solid lubricant applied to an outer periphery of the covering layer.

4. An image guide wherein a plurality of the optical transmission elements according to claim 1 are bundled.

5. A light guide wherein a plurality of the optical transmission elements according to claim 1 are bundled.

6. An endoscope comprising at least one of the image guide according to claim 4 and the light guide according to claim 5 .

7. A method of producing an optical transmission element, comprising:
applying a treatment liquid including alkylsilane which is not fluorine-substituted, to an outer periphery of a cladding of a fiber to form a covering layer, wherein the fiber includes a core made of glass and the cladding made of glass covering an outer periphery of the core;
wherein the alkylsilane is represented by CH 3 (CH 2 ) m Si(OR) n (R′) 3-n wherein m is an integer of 7 or more, n is an integer of 0 to 3, R each respectively represent —CH 3 or —CH 2 CH 3 , and R′ each respectively represent —H, —CH 3 or —CH 2 CH 3 .

8. The method of producing an optical transmission element according to claim 7 , wherein the treatment liquid includes the alkylsilane, a surfactant, and water.

Assignees

• Olympus Corp

Inventors

• Miyata Akihito
• Ishikawa Yuki

Classifications

• C03C25/40

  Organo-silicon compounds · CPC title

• G02B6/08

  with fibre bundle in form of plate · CPC title

• C03C25/30

  Polyolefins · CPC title

• C03C25/106

  Single coatings · CPC title

• G02B6/02395 Primary

  Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture (G02B6/02052, G02B6/02057, G02B6/024, G02B6/032, G02B6/105, G02B6/14 take precedence; coating on fibre gratings G02B6/02104; multilayer core or cladding G02B6/036; reinforcing splice joints G02B6/2558; optical cables, i.e. comprising protective structures external to the protective coating such as a jacket or plural coated optical fibres G02B6/44; coating of glass to obtain optical fibres C03C25/104) · CPC title