US4865417A
Expired / Lapsed
US
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Optical fiber device
Assignee: Mitsubishi Chemical Corp
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Filing: 1987-06-18
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Granted: 1989-09-12
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Expires: 2007-06-18
Abstract
Abstract An optical fiber device comprises a core and a cladding, the core being made of an optical material having a refractive index n1, and the cladding being made of an optical material having a refractive index n2, the end of the optical fiber from which light radiates forming a plane that is inclined to the fiber axis by an angle theta , a light reflective layer being formed at least on the outer periphery of said radiating end, and the two reractive indices n1 and n2 satisfying the following relation (1): n1-n2>/=0.01 (1).
Inventors
- 👤 Yamamoto Naohiro
- 👤 Shuichiro Tokuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/262; G02B6/02; G02B6/04; G02B6/06; G02B6/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A light-transmitting optical fiber device comprising a core being made of an optical material having a refractive index n 1 and a cladding being made of an optical material having a refractive index n 2 , wherein an end of said optical fiber from which light radiates forming a plane that is inclined relative to a fiber axis at an angle θ, a light reflective layer selected from the group of aluminum or white paint, and which is formed at least on the outer periphery of said radiating end and parallel to said cladding layer, the other end of said optical fiber forming a plane that is perpendicular relative to said fiber axis, and said two refractive indices n 1 and n 2 satisfying the following relation (1): n.sub.1 -n.sub.2 ≧0.01 (1).
Claim 2
Dependent Claim
132 words
A light-transmitting optical fiber device comprising a core being made of an optical material having a refractive index n 1 and a cladding being made of an optical material having a refractive index n 2 , wherein an end of said optical fiber from which light radiates forming a plane that is inclined relative to a fiber axis at an angle θ, a light reflective layer selected from the group of aluminum or white paint, and which is formed at least on the outer periphery of said radiating end and parallel to said cladding layer, the other end of said optical fiber forming a plane that is perpendicular relative to said fiber axis, and said two refractive indices n 1 and n 2 satisfying the following relation (1): n.sub.1 -n.sub.2 ≧0.01 (1).
Claim 3
Dependent Claim
18 words
An optical fiber device according to claim 1, wherein said light-reflective layer is formed of a metal coating.
Claim 4
Dependent Claim
25 words
An optical fiber device according to claim 1 or 2, wherein said angle θ is no more than 70° with respect to said fiber axis.
Claim 5
Dependent Claim
18 words
An optical fiber device according to claim 3, wherein said angle θ is within the range of 5°-60°.
Claim 6
Dependent Claim
19 words
An optical fiber device according to claims 1 or 2, wherein said optical fiber is made of a plastic.
Claim 7
Dependent Claim
16 words
An optical fiber device according to claim 4, wherein said optical fiber is made of plastic.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |