Fiber optic lamp

• US 5,109,463 A
• Filed: 06/25/1990
• Issued: 04/28/1992
• Est. Priority Date: 06/25/1990
• Status: Expired due to Term

• Current Assignee: Ho-Shang Lee
• Original Assignee: Ho-Shang Lee
• Inventors: Lee, Ho-Shang
• Primary Examiner(s): Lee, John D.
• Assistant Examiner(s): BARNS, STEPHEN
• Application Number:
  US07/543,339
• Time in Patent Office: 673 Days
• Field of Search: 350/96.3, 350/96.34, 350/96.29, 385/123, 385/141, 385/142, 385/143
• US Class Current: 385/123
• CPC Class Codes: G02B 6/0003 the light guides being doped with fluorescent agents
• CPC Class Codes: G02B 6/4298 coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers

Abstract

A fiberoptic lamp includes one or more optical fibers which include an emitting material so that optical energy given off by the emitting material will be transmitted by the fibers. The lamp has a housing which holds the fibers and an exciting device where energy given off by the exciting device causes the emitting material of the fibers to emit optical energy. This eliminates the need to channel the energy of the exciting device or the optical power emitted by the emitting material into apertures or ends of optical fibers and improves the efficiency of the lamp.

Claims

1. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, and wherein said exciting means produces an electric field and where said emitting material is responsive to said electric field to emit optical energy;

a holding means wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers.

2. The apparatus of claim 1, where said emitting material is an electroluminescent material.

3. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, where said optical fiber comprises a central core, an outer cladding and an interface layer between said core and said cladding, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber, where said emitting material exists within or upon said core or said cladding and said interface layer comprises said emitting material;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, where said exciting means is an irradiating means responsive to electrical energy and producing a radiation for exciting said emitting material into emission of optical power;

a holding means, wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers and wherein said holding means is a housing defining therein a cavity.

4. The apparatus of claim 4, where said emitting material is a luminescent material.

5. The apparatus of claim 4, where said luminescent material is phosphor, alkaline-activated phosphors, tungstate, alkaline-activated tungstate, zinc silicate, cadmium borate or rare earth oxide.

6. The apparatus of claim 4, where said irradiating means comprises one or more electric filaments or electric discharge electrodes.

7. The apparatus of claim 6, where said electric discharge electrodes are contained within a sealed discharge container defining therein a chamber for housing said electrodes, said chamber being filled with a gas or vapor of a type which can be made to radiate when electrical energy is applied across said electrodes, said tube being transparent to said radiation.

8. The apparatus of claim 7, where a metal exists within said chamber in solid, liquid or gaseous form, where said metal, if existing within said chamber in solid or liquid form, is caused to vaporize to a gaseous form upon said application of electrical energy to said electrodes, where said metal gas or vapor serves to improve the efficiency of said radiation process by providing a means for increasing conductivity between said electrodes.

9. The apparatus of claim 8, where said radiation process comprises said metal gas or vapor as the primary said gas or vapor of a type which can be made to radiate when electrical energy is applied across said electrodes.

10. The apparatus of claim 6, where said gas is halogen, rare gases or deuterium, or a vapor such as mercury, sodium or metal halide.

11. The apparatus of claim 4, where said exciting means comprises electric discharge electrodes, said electrodes being provided with a means for connection to an electrical source outside of said housing, said housing containing gas or vapor of a type which can be made to radiate when electrical energy is applied across said electrodes.

12. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, where said exciting means is an irradiating means responsive to electrical energy and producing a radiation for exciting said emitting material into emission of optical power;

a holding means consisting of a housing defining therein a cavity, wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers, where said housing is further provided with heat dissipating means compressed of heat-conductive elements on the outside of said housing to allow for heat dissipation into the surrounding environment.

13. The apparatus of claim 12, where said optical fiber comprises a central core and an outer cladding, where said emitting material exists within or upon said core or said cladding such that optical power given off by said emitting material will be transmitted by said optical fiber.

14. The apparatus of claim 13, where said emitting material is doped uniformly throughout the core.

15. The apparatus of claim 13, where said emitting material is doped uniformly throughout the cladding.

16. The apparatus of claim 12, where said optical fiber is comprised of a central core and outer cladding, where said emitting material exists within or upon said core or said cladding such that optical power given off by said emitting material will be transmitted by said optical fiber, where said core or said cladding or both consist entirely of said emitting material.

17. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, where said exciting means is an irradiating means responsive to electrical energy and producing a radiation for exciting said emitting material into emission of optical power;

a holding means, wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers, and wherein said holding means is a housing defining therein a cavity, where said housing is further provided with a cooling material existing within said cavity which provides increased heat conductivity throughout the volume of said cavity, said cooling material being transparent to said radiation.

18. The apparatus of claim 17, where said cooling material is a liquid or gas, where a forced convection means provides greater cooling effect by circulating said liquid or gas, said housing further comprised of inlet and outlet means to allow a flow of cooling liquid or gas to transfer heat from the inside of said housing to the outside environment.

19. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, where said exciting means is an irradiating means responsive to electrical energy and producing a radiation for exciting said emitting material into emission of optical power;

a holding means, wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers, and where said holding means is a housing defining therein a cavity, and where the end of said fiber or fibers within said housing is reflective with respect to said optical energy.

20. An apparatus for producing optical power in an optical fiber, comprising:

one or more optical fibers of a type suitable for transmitting optical power, said optical fibers including an emitting material which emits optical power when excited such that the optical power given off by said emitting material will be transmitted by said optical fiber;

an exciting means for exciting said emitting material into emission of optical power, said emitting material and said exciting means being such that the optical power is emitted in a non-lasing mode, where said exciting means is an irradiating means responsive to electrical energy and producing a radiation for exciting said emitting material into emission of optical power and where said irradiating means comprises one or more electric filaments or electric discharge electrodes in a discharge container which is cylindrical with said electrodes at each end;

a holding means, wherein said optical fibers and said exciting means are held such that the effect of the exciting means is to excite said emitting material into emission of optical power which is transmitted by said optical fibers, where said holding means is a housing defining therein a cavity, and where said housing is provided with a reflective means on the inner wall of said housing, or where said housing is transparent to said radiation and is provided with a reflective means on the outer wall of said housing, said reflective means serving to reflect said radiation.

21. The apparatus of claim 20, where said housing means is cylindrical, where said discharge container is concentric within said cavity and spans the length of said cavity, said electrodes having protruding means through said tube and said apparatus for connecting said electrodes to an electrical source outside of said housing.

22. The apparatus of claim 21, where said optical fibers are positioned between said housing and said discharge container such that the longitudinal axes of the fibers are parallel with the longitudinal axis of said housing and such that the fibers protrude out of said housing, said positioning serving to increase the surface area of said emitting material able to be impinged by said radiation.

23. The apparatus of claim 22, where said positioning further comprises additional layers of said optical fibers, said layers comprising optical fibers placed next to said optical fibers already positioned between said housing and said discharge container.

24. The apparatus of claim 21, where said optical fibers comprise a single fiber wound around said discharge container and protruding from said housing, said winding serving to increase the surface area of said emitting material able to be impinged by said radiation.

25. The apparatus of claim 20, where said housing means is an elliptical cylinder, where said discharge container is positioned at one of the foci of the ellipse defined by a cross section of said elliptical cylinder, said optical fiber being positioned at the other focus, where the longitudinal axes of said optical fiber and said discharge container are parallel with the longitudinal axis of said housing, such that radiation from said discharge container which does not directly impinge said optical fiber is reflected from said inner wall or outer wall of said housing to impinge said optical fiber.

26. The apparatus of claim 25, where said optical fiber comprises a bundle of two or more optical fibers protruding out of said housing.

27. The apparatus of claim 25, where said apparatus further comprises a supporting rod attached to said housing, where said optical fiber is a single fiber wound around said supporting rod, said optical fiber protruding from said housing.