Patent US4398790A successfully refreshed from Google Patents.
US4398790A
Expired / Lapsed
US
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Optical fiber device for the transportation and focalization of laser radiation
Assignee: Consiglio Nazionale delle Richerche
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Filing: 1980-06-24
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Granted: 1983-08-16
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Expires: 2000-06-24
Abstract
Abstract An optical fiber device for the transportation and focalization of laser radiation, wherein the output terminal of the device presents a convex surface which may be spherical.
Inventors
- 👤 Giancarlo Righini
- 👤 Vera Russo
- 👤 Stefano Sottini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:08
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/0648; B23K26/0665; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; G02B6/4296; A61B2018/2205; A61B2018/2255; A61B2018/2266; A61B2018/2272
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
An optical fiber device for the transportation and focalization of laser radiation, comprising a single optical fiber having a core made of glass or quartz and including entrance and exit terminals, wherein said exit terminal is a convex surface formed in the optical fiber material and doped to create an index of refraction axially different than the main body of the optical fiber; and said exit terminal of the optical fiber device is a microlens incorporated into the fiber, the radius of curvature of which is controlled by the amount of dopant used to create said axially different index of refraction.
Claim 2
Dependent Claim
101 words
An optical fiber device for the transportation and focalization of laser radiation, comprising a single optical fiber having a core made of glass or quartz and including entrance and exit terminals, wherein said exit terminal is a convex surface formed in the optical fiber material and doped to create an index of refraction axially different than the main body of the optical fiber; and said exit terminal of the optical fiber device is a microlens incorporated into the fiber, the radius of curvature of which is controlled by the amount of dopant used to create said axially different index of refraction.
Claim 3
Dependent Claim
16 words
An optical fiber device as defined in claim 1, wherein said convex surface is spherically curved.
Claim 4
Dependent Claim
23 words
An optical fiber device as defined in claim 1, wherein both said entrance and exit terminals of the optical fiber device are convex.
Claim 5
Dependent Claim
24 words
An optical fiber device as defined in claim 1, wherein both said entrance and exit terminals of the optical fiber device are spherically curved.
Claim 6
Dependent Claim
22 words
An optical fiber device as defined in claim 1, wherein said entrance and exit terminals of the optical fiber device are trumpet-shaped.
Claim 7
Dependent Claim
22 words
An optical fiber device as defined in claim 1, wherein the optical fiber of said device is protected by a flexible sheath.
Claim 8
Dependent Claim
24 words
An optical fiber device as defined in claim 6, wherein said exit terminal portion of the optical fiber is provided with a rigid sleeve.
Claim 9
Dependent Claim
23 words
An optical fiber device as defined in claim 7, wherein said exit terminal portion of the optical fiber device is opaque to X-rays.
Claim 10
Dependent Claim
36 words
An optical fiber device as defined in claim 1 wherein said dopant created index of refraction is up to and including 0.2 greater than the index of refraction of the main body of the optical fiber.
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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |