EP0260742A1
Expired / Lapsed
EP
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Optical transmission fibre having a tapered end portion provided with a lens
Assignee: Koninklijke Philips NV
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Filing: 1987-09-07
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Granted: —
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Expires: 2007-09-07
Abstract
Abstract A monomode optical transmission fibre (1) is described an end portion (5) of which has a tapered core (2) and cladding (3), which end portion is provided with a lens (7) having a spherical outer surface (8). A transparent layer of a cured synthetic material (9) whose outer profile (10) is adapted to the specific circumstances under which the transmission fibre is to be used is provided on the lens substrate (7) by means of a replica technique.
Inventors
- 👤 Giok Djan Khoe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 05:36
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/0888; B29C41/00; B29C41/02; B29C41/20; B29C67/00; B29C67/0044; B29C70/00; B29C70/68; B29C70/74; B29C70/76; B29D; B29D11/00; B29D11/00009; B29D11/00365; B29D11/00663; B29D11/00692; B29C35/0805; B29C2035/0827; B29C41/14; B29L; B29L2011/00; B29L2011/0075
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A monomode optical transmission fibre having an end portion comprising a tapered core and cladding and being provided with a lens having a spherical outer surface, characterized in that a transparent layer of a cured synthetic material having a varying thickness is provided on the lens so that the outer surface of this layer has a profile deviating from the spherical shape.
Claim 2
Dependent Claim
62 words
A monomode optical transmission fibre having an end portion comprising a tapered core and cladding and being provided with a lens having a spherical outer surface, characterized in that a transparent layer of a cured synthetic material having a varying thickness is provided on the lens so that the outer surface of this layer has a profile deviating from the spherical shape.
Claim 3
Dependent Claim
30 words
A monomode optical transmission fibre as claimed in Claim 1, characterized in that the layer of cured material is a material which is cured under the influence of ultraviolet radiation.
Claim 4
Dependent Claim
25 words
A monomode optical transmission fibre as claimed in Claim 1 or 2, characterized in that the layer of cured material has an aspherical outer surface.
Claim 5
Dependent Claim
26 words
A monomode optical transmission fibre as claimed in Claim 1 or 2, characterized in that the layer of cured material has a non-rotationally symmetrical outer surface.
Claim 6
Dependent Claim
23 words
A monomode optical transmission fibre as claimed in Claim 4, characterized in that the layer of cured material has a cylindrical outer surface.
Claim 7
Dependent Claim
29 words
A monomode optical transmission fibre as claimed in Claim 1, 2, 3, 4 or 5, characterized in that the outer surface of the layer of cured material is anti-reflective.
Claim 8
Dependent Claim
100 words
A method of manufacturing a monomode optical transmission fibre as claimed in Claim 1, using a transmission fibre with a tepered core and cladding on which a lens having a spherical outer surface is arranged, characterized in that this lens is used as a lens substrate on which a synthetic material in a sufficiently soft condition is provided, whereafter a mould having a specific profile is pressed against it, the synthetic material is cured and the mould is removed, whereafter the lens on the fibre end portion has acquired an outer profile which is the reverse of the mould profile.
Claim 9
Dependent Claim
21 words
A method as claimed in Claim 7, characterized in that the soft synthetic material is cured by irradiation with ultraviolet radiation.
Claim 10
Dependent Claim
20 words
A method as claimed in Claim 8, characterized in that a mould is used which is transparent to ultraviolet radiation.
Claim 11
Dependent Claim
47 words
A method as claimed in Claim 7, 8 or 9, characterized in that a mould is used which comprises a first portion accommodating the profile and a second portion secured to the first portion and which is used to guide the end portion of the transmission fibre.
References Cited (Backward Citations)
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