Fiber optics illuminator

• US 4,241,382 A
• Filed: 03/23/1979
• Issued: 12/23/1980
• Est. Priority Date: 03/23/1979
• Status: Expired due to Term

• Current Assignee: Maurice Daniel
• Original Assignee: Maurice Daniel
• Inventors: Daniel, Maurice
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US06/023,034
• Time in Patent Office: 641 Days
• Field of Search: 362/32, 362/255, 362/300, 362/346, 362/350
• US Class Current: 362/581
• CPC Class Codes: G02B 6/0006 Coupling light into the fibre in general G02B6/4298
• CPC Class Codes: G02B 6/403 of the ferrule type, connecting a pair of ferrules
• 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 fiber optics illuminator is described consisting of a light bulb having a fiber optics coupler or coupling means integral with the bulb envelope. The bulb is provided with a combination of ellipsoidal and spherical mirrors which together direct all light emitted from the filiment through a small optical window located at the rear of said coupler or coupling means. To facilitate trapping of the light in the optical fibers, the light is made to emerge from the optical window at angles equal to or less than the critical angle of the fibers. This invention is intended for use as a primary light source for most applications involving illumination wherein visible or infra-red or ultraviolet electromagnetic radiation is channeled by optical fibers to illuminate a specific environment.

Claims

1. A fiber optics illuminator including:

(a) a source of illumination; and

(b) an envelope means enclosing said source of illumination, said envelope means having an optical window means integrally formed therein for passing illumination from said source of illumination through said envelope means, said envelope means also having inner reflective surface means geometrically shaped to focus substantially all of the illumination from said source of illumination onto said optical window means.

2. A fiber optics illuminator as set forth in claim 1, wherein said inner reflective surface means is composed of a plurality of geometrically shaped sections joined together.

3. A fiber optics illuminator as set forth in claim 2, wherein said geometrically shaped sections include a first section in the form of a spherical reflector and a second section in the form of an ellipsoidal reflector.

4. A fiber optics illuminator as set forth in claim 3 wherein said spherical reflector section and said ellipsoidal reflector section are joined by a third section in the form of a right cone frustum.

5. A fiber optics illuminator as set forth in claim 4, wherein the radius of the spherical reflector is equal to the distance between the two foci of the ellipsoidal reflector.

6. A fiber optics illuminator as set forth in claim 5, wherein the source of illumination is positioned at the focus nearest the ellipsoidal reflector section and the optical window means is positioned at the focus farthest away from the ellipsoidal reflector section.

7. A fiber optics illuminator as set forth in claim 1, wherein said optical window means is transparent.

8. A fiber optics illuminator as set forth in claim 7, wherein said optical window means is an optical lens.

9. A fiber optics illuminator as set forth in claim 7, wherein said optical window means is a diverging optical lens.

10. A fiber optics illuminator se set forth in claim 1, including a fiber optics coupling means extending outwardly from said envelope means, said fiber optics coupling means operating to couple light transmitting means to said envelope means to receive illumination passing through said optical window means.

11. A fiber optics illuminator as set forth in claim 10, wherein said light transmitting means coupled to said envelope means includes a bundled plurality of optical fibers.

12. A fiber optics illuminator as set forth in claim 11, wherein one end of each optical fiber comprising said bundled plurality of optical fibers abuts said optical window means, each of said ends being cut and polished to provide a flat surface at the point of abutment.

13. A fiber optics illuminator as set forth in claim 12, wherein said inner reflective surface means is geometrically shaped to focus substantially all of the illumination from said source of illumination onto the outer surface of said optical window means at an angle less than the critical angle of the optical fibers comprising said bundled plurality of optical fibers.

14. The fiber optics illuminator as set forth in claim 12, wherein said inner reflective surface means is geometrically shaped to focus substantially all of the illumination from said source of illumination onto the outer surface of said optical window means at an angle of less than 30°

.

15. The fiber optics illuminator as set forth in claim 12, wherein said inner reflective surface means is geometrically shaped to focus substantially all of the illumination from said source of illumination onto the outer surface of said optical window means at an angle of less than 15°

.

16. A fiber optics illuminator as set forth in claim 12 wherein said fiber optic coupling means includes a hollow tubular projection extending outwardly from said optical window means and formed integrally therewith, said fiber optic coupling means also including a hollow tubular shaft means which encircles said bundled plurality of optical fibers and fits within said hollow tubular projection to bring the cut and polished ends of the optical fibers comprising said bundled plurality of optical fibers into abutment with said optical window means.

17. The fiber optics illuminator as set forth in claim 16, wherein a collar means is attached to said hollow tubular shaft means to prevent said hollow tubular shaft means from damaging said optical window means when said hollow tubular shaft means is inserted into said hollow tubular projection.

18. The fiber optics illuminator as set forth in claim 16, wherein a removable clamp means operates to lock said hollow tubular shaft means relative to said hollow tubular projection.

19. A fiber optics illuminator as set forth in claim 12, wherein said fiber optics coupling means includes an externally threaded hollow tubular projection extending outwardly from said optical window means and formed integrally therewith, said fiber optics coupling means also including an internally threaded cap means containing an internal shroud which encircles said bundled plurality of optical fibers, said internally threaded cap means operating to insert said internal shroud into said externally threaded hollow tubular projection to bring the cut and polished ends of the optical fibers comprising said bundled plurality of optical fibers into abutment with said optical window means whenever said internally threaded cap means is threaded onto said externally threaded hollow tubular projection.

20. The fiber optics illuminator as set forth in claim 19, wherein a collar means is attached to said internal shroud to prevent the internal shroud from damaging the optical window means when said internal shroud is inserted into said externally threaded hollow tubular projection.

21. A fiber optics illuminator as set forth in claim 11, wherein said fiber optics coupling means includes an externally threaded glass projection which extends outwardly from said optical window means and is integral therewith, said fiber optics coupling means also including an internally threaded fiber optics adaptor means to which said bundled plurality of optical fibers is attached, said fiber optics adapter means operating to bring said bundled plurality of optical fibers into contact with said externally threaded glass projection whenever said fiber optics adapter means is threaded onto said externally threaded glass projection.

22. A fiber optics illuminator as set forth in claim 1 wherein the interior of said envelope means is filled with gas.

23. A fiber optics illuminator as set forth in claim 1, wherein said source of illumination includes a tungsten filament.

24. A fiber optics illuminator as set forth in claim 1, wherein a threaded electrical connecting means protrudes from the outer surface of said envelope means and can be threaded into a conventional light bulb socket to transmit energy from a conventional electrical supply circuit to said source of illumination.

25. A fiber optics illuminator as set forth in claim 1, wherein cooling fins are formed on the outer surface of said envelope means.

26. A fiber optics illuminator including:

(a) a source of illumination which generates both visible light and infra-red radiation; and

(b) an envelope means enclosing said source of illumination, said envelope means having an optical window means integrally formed therein for passing visible light from said source of illumination through said envelope means, said envelope means also having an inner reflective surface means geometrically shaped to reflect substantially all of the visible light generated by said source of illumination toward a focal point located at said optical window means while simultaneously transmitting substantially all of the infra-red radiation generated by said source of illumination away from said focal point.