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US4873030A
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Method of molding a resinous optical transmitting element
Assignee: Hitachi Cable Ltd
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Filing: 1988-07-01
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Granted: 1989-10-10
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Expires: 2008-07-01
Abstract
Abstract There is provided a resinous optical transmitting element in which a core, through which light is transmitted, is formed into a predetermined non-linear configuration, and a cladding lower in refractive index than the core is in close contact with the core. A method of manufacturing the optical transmitting element comprises the steps of polymerizing polymeric material forming the core, within a mold having a predetermined non-linear cavity, subsequently removing the mold, and forming the cladding about the core. The resinous optical transmitting element obtained by the method can be formed into a selected one of various configurations in compliance with the purpose. In addition, the resinous optical transmitting element is less in distortion, making it possible to reduce the transmission loss.
Inventors
- 👤 Noriaki Taketani
- 👤 Hideki Asano
- 👤 Akira Endo
- 👤 Tomiya Abe
- 👤 Masahiko Ibamoto
- 👤 Junji Mukai
- 👤 Seikichi Tanno
- 👤 Shuji Eguchi
- 👤 Masato Shimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:46
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4457; G02B6/4458; B; B29; B29D; B29D11/00; B29D11/00663; G02B6/02; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/30; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; G02B6/4204; G02B6/4255; G02B6/4295; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
A method of manufacturing a resinous optical transmitting element comprising a core through which light is transmitted, and a cladding which is lower in refractive index than said core, said method comprising the steps of polymerizing polymeric material forming said core, within a mold having a predetermined non-linear cavity, subsequently removing said mold, and forming said cladding about said core.
Claim 2
Independent Claim
60 words
A method of manufacturing a resinous optical transmitting element comprising a core through which light is transmitted, and a cladding which is lower in refractive index than said core, said method comprising the steps of polymerizing polymeric material forming said core, within a mold having a predetermined non-linear cavity, subsequently removing said mold, and forming said cladding about said core.
Claim 3
Dependent Claim
44 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold having one of a curled configuration and a spiral configuration, subsequently removing said mold, and molding said cladding.
Claim 4
Dependent Claim
38 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold having a bent configuration, subsequently removing said mold, and forming said cladding.
Claim 5
Dependent Claim
46 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold having a cross-sectional area gradually decreasing as a forward end of said mold is approached from a rear end thereof.
Claim 6
Dependent Claim
39 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold having at least a part thereof whose cross-sectional area has a polygonal configuration.
Claim 7
Dependent Claim
39 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold having at least a part thereof whose cross-sectional area has an elliptical configuration.
Claim 8
Dependent Claim
51 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold in such a manner that a refractive index varies in the form of a quadratic curve from a center of said core toward said cladding.
Claim 9
Dependent Claim
42 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold, subsequently removing said mold, and forming said cladding having, in at least a part thereof, foam.
Claim 10
Dependent Claim
40 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold, subsequently removing said mold, and forming said cladding having therein an electric transmitting element.
Claim 11
Dependent Claim
53 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold, subsequently removing said mold, and forming said cladding having a structure in which at least a part of said cladding permits light to leak to the outside.
Claim 12
Dependent Claim
43 words
A method of manufacturing a resinous optical transmitting element, according to claim 1, including the steps of cast-molding and polymerizing said core material within said mold, subsequently removing said mold, and forming said cladding having at least one projecting structure required for connection.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |