US4466697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light dispersive optical lightpipes and method of making the same
Assignee: Individual
•
Filing: 1981-11-12
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Granted: 1984-08-21
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Expires: 2001-11-12
Abstract
Abstract The optical lightpipes are provided with an internal structural configuration which enables the pipes to either transmit light with greater efficiency or to emit light more effectively along the length of the lightpipe. For light emission, light transmitting optical fibers are doped in the core region with refractive and/or reflective light scattering particles. When with a single optical fiber lightpipe, ribs are formed on the exterior of the lightpipe to prevent the lightpipe from being deformed to an angle greater than the critical angle for light conductance. A single tubular lightpipe of plastic may be formed with an internal reflective layer and outer ribs to control bending of the pipe.
Inventors
- 👤 Maurice Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:11
CPC Classifications
A; A47; A47G; A47G19/00; A47G19/12; A47G19/16; B; B29; B29C; B29C48/00; B29C48/03; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/001; G02B6/0096; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/2817
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
65 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being particles of nontransparent, reflective material.
Claim 2
Dependent Claim
65 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being particles of nontransparent, reflective material.
Claim 3
Dependent Claim
24 words
The optical fiber of claim 1 wherein said small particles are concentrated in an area adjacent the central longitudinal axis of said core means.
Claim 4
Dependent Claim
22 words
The optical fiber as set forth in claim 1 wherein said light transmitting core means is covered by a light transmitting material.
Claim 5
Dependent Claim
31 words
The optical fiber as set forth in claim 1 wherein said small particles are angularly oriented relative to the central longitudinal axis of said core means in a predetermined angular relationship.
Claim 6
Dependent Claim
49 words
The optical fiber as set forth in claim 1 wherein said light transmitting core means is coated with a cladding means, said cladding means being operative to pass light transmitted thereto at angles greater than a critical angle and to reflect light at angles less than said critical angle.
Claim 7
Dependent Claim
26 words
The optical fiber as set forth in claim 5 wherein said core and cladding means are covered by a light transmitting material encapsulating said cladding means.
Claim 8
Dependent Claim
67 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being a mixture of reflective and refractive particles.
Claim 9
Dependent Claim
67 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being a mixture of reflective and refractive particles.
Claim 10
Dependent Claim
24 words
The optical fiber of claim 7 wherein said small particles are concentrated in an area adjacent the central longitudinal axis of said core means.
Claim 11
Dependent Claim
49 words
The optical fiber as set forth in claim 7 wherein said light transmitting core means is coated with a cladding means, said cladding means being operative to pass light transmitted thereto at angles greater than a critical angle and to reflect light at angles less than said critical angle.
Claim 12
Dependent Claim
26 words
The optical fiber as set forth in claim 9 wherein said core and cladding means are covered by a light transmitting material encapsulating said cladding means.
Claim 13
Dependent Claim
63 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being dielectric mirror flakes.
Claim 14
Dependent Claim
63 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being dielectric mirror flakes.
Claim 15
Dependent Claim
18 words
The optical fiber of claim 11 wherein said dielectric mirror flakes are of a number of different thicknesses.
Claim 16
Dependent Claim
62 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being metal flakes.
Claim 17
Dependent Claim
62 words
An optical fiber comprising an elongated light transmitting core means and electromagnetic radiation scattering means embedded in said core means, said electromagnetic radiation scattering means serving to scatter electromagnetic radiation passing longitudinally through said optical fiber laterally outwardly from the core means of said optical fiber and including small particles relatively spaced within said core means, said small particles being metal flakes.
Claim 18
Independent Claim
44 words
A method for forming an optical fiber of light transmitting material capable of extrusion which includes placing said light transmitting material in a molten state, mixing light scattering particles with said molten light transmitting material and extruding such mixture to form an elongated fiber.
Claim 19
Independent Claim
44 words
A method for forming an optical fiber of light transmitting material capable of extrusion which includes placing said light transmitting material in a molten state, mixing light scattering particles with said molten light transmitting material and extruding such mixture to form an elongated fiber.
Claim 20
Dependent Claim
19 words
The method defined by claim 14 wherein said light scattering particles are a mixture of reflective and refractive particles.
References Cited (Backward Citations)
US3090931A
Cited
US3403955A
Cited
US3506331A
Cited
US3508589A
Cited
US3653739A
Cited
US3746424A
Cited
US3902879A
Cited
US3920312A
Cited
JPS5237441A
Cited
DE2638406A1
Cited
US4195907A
Cited
GB1558404A
Cited
US4234907A
Cited
US4422719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |