Patent EP0428998A1 successfully refreshed from Google Patents.
EP0208175A2
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Light transmitting apparatus
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1986-06-16
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Granted: —
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Expires: 2006-06-16
Abstract
Abstract A light transmission apparatus in which light from a laser is transmitting through a fiber optic. Dry air is also pumped through the optic to remove matter from the vicinity of the light emitting end. A cover of a shape memory alloy is provided at the light emitting end to open at a high temperature in response to incident light and close at a low temperature when the light stops.
Inventors
- 👤 Kenichi C/O Osaka Works Takahashi
- 👤 Noriyuki C/O Osaka Works Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/14; B23K26/1462; B23K26/1464; B23K26/1476; A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B1/00; A61B1/00142; A61B2018/00636; A61B2018/2205; A61B2018/2222; A61B2018/2233; A61B2018/2244; A61B2218/00; A61B2218/001; A61B2218/002; A61B2218/005; A61F; A61F2210/00; A61F2210/0014; A61F2210/0023; A61F2210/0047
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
47 words
A light transmission apparatus comprising: an optical fiber having a light receiving end and a light emitting end; and means for supplying gas to said fiber so that gas is fed to said light emitting end to remove matter from the vicinity of said light emitting end.
Claim 2
Dependent Claim
47 words
A light transmission apparatus comprising: an optical fiber having a light receiving end and a light emitting end; and means for supplying gas to said fiber so that gas is fed to said light emitting end to remove matter from the vicinity of said light emitting end.
Claim 3
Dependent Claim
20 words
An apparatus as in claim 1 further including a forward end protecting cover openably/closably provided at said light emitting end.
Claim 4
Dependent Claim
46 words
An apparatus as in claim 2 wherein said cover is formed of a shape memory alloy storing a shape so as to open at a high temperature and close at a low temperature produced respectively in response to incidence of light and stopping of said incidence.
Claim 5
Dependent Claim
16 words
An apparatus as in claim 2 wherein the back surface of said cover is made rough.
Claim 6
Dependent Claim
16 words
An apparatus as in claim 2 wherein the back surface of said cover is painted black.
Claim 7
Dependent Claim
16 words
An apparatus as in claim 2 wherein said cover is formed in at least two portions.
Claim 8
Dependent Claim
16 words
An apparatus as in claim 6 wherein said cover is formed in a plurality of portions.
Claim 9
Dependent Claim
25 words
An apparatus as in claim 6 wherein said portions do not extend beyond said light emitting end of said fiber when said cover is open.
Claim 10
Dependent Claim
17 words
An apparatus as in claim 1 further including a laser for supplying said light to said fiber.
Claim 11
Dependent Claim
13 words
An apparatus as in claim 1 wherein said fiber includes a quartz fiber.
Claim 12
Dependent Claim
26 words
An apparatus as in claim 1 wherein said fiber includes a crystalline fiber selected from the grbup consisting of silver halide, thallium halide and alkali halide.
Claim 13
Dependent Claim
89 words
A light power transmission apparatus comprising: an optical fiber including an optical light conductor, an inner layer surrounding said conductor and an outer layer surrounding said inner lay to form a ventilation path with said inner layer, said outer layer having a hole therethrough; a forward end protecting cover openably/closably provided at a light emitting end of said optical fiber; a gas feeder/suction means for feeding dry gas to said path via said hole; and a gas pressure sensor for monitoring the pressure of said gas in said path.
Claim 14
Dependent Claim
89 words
A light power transmission apparatus comprising: an optical fiber including an optical light conductor, an inner layer surrounding said conductor and an outer layer surrounding said inner lay to form a ventilation path with said inner layer, said outer layer having a hole therethrough; a forward end protecting cover openably/closably provided at a light emitting end of said optical fiber; a gas feeder/suction means for feeding dry gas to said path via said hole; and a gas pressure sensor for monitoring the pressure of said gas in said path.
Claim 15
Dependent Claim
52 words
An apparatus as in claim 12 wherein said cpver includes a cylindrical attaching portion in said light emitting end for fixing said cover between said inner and outer layer and having a central opening through which said light conductor extends and a cap portion covering the front end of said optical fiber.
Claim 16
Dependent Claim
46 words
An apparatus as in claim 12 wherein said cover is formed of a shape memory alloy storing a shape so as to open at a high temperature and close at a low temperature produced respectively in response to incidence of light of stopping of said incidence.
Claim 17
Dependent Claim
16 words
An apparatus as in claim 12 wherein the back surface of said cover is made rough.
Claim 18
Dependent Claim
16 words
An apparatus as in claim 12 wherein the back surface of said cover is painted black.
Claim 19
Dependent Claim
16 words
An apparatus as in claim 12 wherein said cover is formed in at least two portions.
Claim 20
Dependent Claim
16 words
An apparatus as in claim 17 wherein said cover is formed in a plurality of portions.
Claim 21
Dependent Claim
26 words
An apparatus as in claim 17 wherein said portions do not extend beyond the said light emitting end of said fiber when said cover is open.
Claim 22
Dependent Claim
17 words
An apparatus as in claim 12 further including a laser for supplying said light to said fiber.
Claim 23
Dependent Claim
65 words
A light transmission apparatus comprising: an optical fiber having a light receiving end and a light emitting end; and a metal cover mounted to said light emitting end and formed of a shape memory alloy storing a shape so as to open at a high temperature and close at a low temperature produced respectively in response to incidence of light and stopping of said incidence.
Claim 24
Dependent Claim
65 words
A light transmission apparatus comprising: an optical fiber having a light receiving end and a light emitting end; and a metal cover mounted to said light emitting end and formed of a shape memory alloy storing a shape so as to open at a high temperature and close at a low temperature produced respectively in response to incidence of light and stopping of said incidence.
Claim 25
Dependent Claim
16 words
An apparatus as in claim 21 wherein the back surface of said cover is made rough.
Claim 26
Dependent Claim
16 words
An apparatus as in claim 21 wherein the back surface of said cover is painted black.
Claim 27
Dependent Claim
17 words
24-. An apparatus as in claim 21 wherein said cover is formed in at least two portions.
Claim 28
Dependent Claim
16 words
An apparatus as in claim 24 wherein said cover is formed in a plurality of portions.
Claim 29
Dependent Claim
26 words
An apparatus as in claim 24 wherein said portions do not extend beyond the said light emitting end of said fiber when said cover is open.
Claim 30
Dependent Claim
17 words
An apparatus as in claim 21 further including a laser for supplying said light to said fiber.
Claim 31
Dependent Claim
13 words
An apparatus as in claim 21 wherein said fiber includes a quartz fiber.
Claim 32
Dependent Claim
26 words
An apparatus as in claim 21 wherein said fiber includes a crystalline fiber selected from the group consisting of silver halide, thallium halide and alkalai halide.
Claim 33
Independent Claim
41 words
A method of transmitting light comprising the steps of: transmitting light through a optical fiber to a light emitting end; and feeding gas through said fiber to said end to remove any matter from the vicinity of said light emitting end.
Claim 34
Independent Claim
41 words
A method of transmitting light comprising the steps of: transmitting light through a optical fiber to a light emitting end; and feeding gas through said fiber to said end to remove any matter from the vicinity of said light emitting end.
Claim 35
Dependent Claim
34 words
A method as in claim 30 wherein said gas is chosen from the group consisting of dry air, Ar and N 2 , and has a relative humidity equal to or less than 40%.
Claim 36
Dependent Claim
22 words
A method as in claim 30 wherein said gas is fed at a pressure between 1.01 and 1.2 kg/ cm 2 .
Claim 37
Dependent Claim
32 words
A method as in claim 30 including the further step of heating a cover at said light emitting end of shape memory alloy to open said cover in response to incident light.
Claim 38
Dependent Claim
15 words
A method as in claim 30 wherein said step of transmitting includes transmitting laser light.
References Cited (Backward Citations)
US4010345A
Cited
WO1985005263A1
Cited
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