EP0163266A2
Expired / Lapsed
EP
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Optical fiber for lateral irradiation of laser beam
Assignee: Fujinon Corp
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Filing: 1985-05-24
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Granted: —
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Expires: 2005-05-24
Abstract
Abstract An optical fiber (10, 20, 30) for lateral irradiation of laser beam for making the laser beam to irradiate laterally in a through-endoscopic manner in a tubular cavity of an internal organ. According to the present invention, the fiber (10, 20, 30) for the laser beam lateral irradiation has an exiting end (13, 23, 33) thereof formed into a reflectory surface (22, 32) inclined at about 45° to the center axis of the fiber (20, 30), and an exiting planar surface (23, 33) being in parallel to the center axis of the fiber (20, 30) is formed at a surface of the fiber (20, 30) on the exiting side of the laser beam reflected by the inclined reflectory surface (22, 32). With the laser beam lateral irradiation fiber (20, 30) according to the present invention, the cross-sectional shape of the exiting beam is circular and the scattering of the exiting beam is controlled, so that the irradiation beam high in density of the irradiation energy can be obtained. Furthermore, according to the present invention, a coil-shaped spring (60) is wound around the outer periphery of the fiber (10, 20, 30), so that the fiber (10, 20, 30) can be smoothly inserted through a very small hole such as a forceps hole (54) of a manual control section (40) of an endoscope. t
Inventors
- 👤 Daijo Hashimoto
- 👤 Toshio C/O Hitachi Cable Ltd. Suzuki
- 👤 Koichi Abe
- 👤 Masane Suzuki
- 👤 Motonori Kanaya
- 👤 Syuki C/O Hitachi Cable Ltd. Saito
- 👤 Hiroshi Shibamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 05:02
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/06; A61B1/07; A61B1/0615; A61B5/00; A61B5/0059; A61B5/0082; A61B5/0084; G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; G02B23/2461; G02B23/2469
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
An optical fiber (20, 30) for lateral irradiation of laser beam wherein a reflectory surface (22, 32) inclined at about 45° to the center axis of a fiber (20, 30) is formed at an exiting end (23, 33) of the beam transmitting fiber (20, 30) constituted by a core (11) and a clad (12), which are different in refractive index from each other, and an exiting planar surface (23, 33) being parallel to the center axis of said fiber (20, 30) is formed at a surface of said fiber (20, 30) on the exiting side of the laser beam reflected by said inclined reflectory surface (22, 32).
Claim 2
Dependent Claim
107 words
An optical fiber (20, 30) for lateral irradiation of laser beam wherein a reflectory surface (22, 32) inclined at about 45° to the center axis of a fiber (20, 30) is formed at an exiting end (23, 33) of the beam transmitting fiber (20, 30) constituted by a core (11) and a clad (12), which are different in refractive index from each other, and an exiting planar surface (23, 33) being parallel to the center axis of said fiber (20, 30) is formed at a surface of said fiber (20, 30) on the exiting side of the laser beam reflected by said inclined reflectory surface (22, 32).
Claim 3
Dependent Claim
45 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 1, wherein a clad layer (12) remains between said exiting surface (23, 33) being in parallel to the center axis of said fiber (20, 30) and said core (11).
Claim 4
Dependent Claim
33 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 1, wherein a reflectory film layer (24, 34) is provided on said inclined reflectory surface (22, 32).
Claim 5
Dependent Claim
104 words
An optical fiber (20,30) for lateral irradiation of laser beam, wherein a reflectory surface (22,32)inclined at about 45° to the center axis of a fiber(20,30)is formed at an exiting end (23,33)of the beam transmitting fiber (20,30)constituted by a core (11) and a clad (12), which are different in refractive index from each other, an exiting planar surface (23,33) being parallel to the center axis of said fiber (20,30)is formed at a surface of said fiber (20,30) on-the exiting side of the laser beam reflected by.said inclined reflectory surface (22,32) and a coil-shaped spring (60) is wound around the outer periphery of said fiber(20,30) .
Claim 6
Dependent Claim
104 words
An optical fiber (20,30) for lateral irradiation of laser beam, wherein a reflectory surface (22,32)inclined at about 45° to the center axis of a fiber(20,30)is formed at an exiting end (23,33)of the beam transmitting fiber (20,30)constituted by a core (11) and a clad (12), which are different in refractive index from each other, an exiting planar surface (23,33) being parallel to the center axis of said fiber (20,30)is formed at a surface of said fiber (20,30) on-the exiting side of the laser beam reflected by.said inclined reflectory surface (22,32) and a coil-shaped spring (60) is wound around the outer periphery of said fiber(20,30) .
Claim 7
Dependent Claim
34 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 4, wherein said coil-shaped spring (60) is wound around the outer periphery of the optical fiber (20, 30).
Claim 8
Dependent Claim
61 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 4, wherein said spring (60) is previously formed into a coil-shape and the optical fiber (20, 30) is inserted through a hollow space in said coil-shaped spring (60) to obtain the coil-shaped spring (60) wound around the outer periphery of the optical fiber (20, 30).
Claim 9
Dependent Claim
58 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 6, wherein, after the optical fiber (20, 30) is inserted through the hollow space in said coil-shaped spring (60), said coil-shaped spring (60) is forcedly extended in the longitudinal direction to wind around the outer periphery of the optical fiber (20, 30).
Claim 10
Dependent Claim
51 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 4, wherein the outer peripheral surface of said optical fiber (20, 30) is connected to said coil-shaped spring (60) by fusion bonding through the heat of the external material of said optical fiber (20, 30).
Claim 11
Dependent Claim
42 words
An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 4, wherein the outer peripheral surface of said optical fiber (20, 30) and said coil-shaped spring (60) are bonded to each other through a bonding agent.
Claim 12
Dependent Claim
38 words
10 . An optical fiber (20, 30) for lateral irradiation of laser beam as set forth in claim 4, wherein said clad (12) of the optical fiber (20, 30) is a quartz glass clad or a polymer clad.
References Cited (Backward Citations)
No citation records indexed.
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