Optical light pipes with laser light appearance

• US 6,031,958 A
• Filed: 11/20/1998
• Issued: 02/29/2000
• Est. Priority Date: 05/21/1997
• Status: Expired due to Term

• Current Assignee: Thomas H. Mcgaffigan
• Original Assignee: Thomas H. Mcgaffigan
• Inventors: McGaffigan, Thomas H.
• Primary Examiner(s): NGO, HUNG NHAT
• Application Number:
  US09/197,014
• Time in Patent Office: 466 Days
• Field of Search: 362/555, 362/558, 362/559, 362/560, 385/47, 385/48, 385/36, 385/37, 385/146, 385/901
• US Class Current: 385/146
• CPC Class Codes: B29C 2791/001 Shaping in several steps
• CPC Class Codes: B29C 33/42 characterised by the shape of the moulding surface, e.g. ribs or grooves
• CPC Class Codes: B29C 43/00 Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor by liberation of internal stresses B29C61/006
• CPC Class Codes: B29C 49/04 Extrusion blow-moulding
• CPC Class Codes: B29D 11/00663 Production of light guides
• CPC Class Codes: B29K 2995/0031 Refractive
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02B 6/001 the light being emitted along at least a portion of the lateral surface of the fibre
• CPC Class Codes: G02B 6/0096 the lights guides being of the hollow type
• CPC Class Codes: G02B 6/4298 coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

A simulated laser light system includes a light source which emits substantially parallel light rays and a prismatic element having a plurality of prismatic surfaces. The prismatic surfaces define a curved surface either on the inside or the outside of the prismatic element. The prismatic surfaces redirect the light rays emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface. The simulated laser light system appears to emit light from a centerline of the prismatic element when the light is actually emitted from an exterior surface of the prismatic element.

Claims

1. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein the prismatic element comprises a tube, said prismatic surfaces being located on the inside of said tube and said light rays being axially projected by the light source along the centerline of said tube.

2. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein the prismatic element comprises a cylindrical rod, the prismatic surfaces being located on the outside of said rod, said light rays being projected by the light source along a centerline of said rod, and the prismatic surfaces are protected by a protective coating around the cylindrical rod.

3. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein said prismatic element comprises a cylindrical rod and concentrically mounted tube, said rod having prismatic surfaces on the outside of said rod and said tube having prismatic surfaces on the inside of said tube, said prismatic surfaces of said rod and tube being complimentary to each other and in contact with each other.

4. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein the prismatic element is an elongated element, the light source is positioned at one end of the element, and a second light source is positioned at a second end of the elongated element.

5. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein a plurality of prismatic elements are arranged in an array as an alphanumeric display.

6. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein the light emitted from the prismatic element in a plurality of planes appears to an observer to be emitted from the center line of the prismatic element regardless of the observer'"'"'s location.

7. The simulated laser light system as in claim 6, wherein said light source is a light emitting diode.

8. The simulated laser light system as in claim 6, wherein said light source is a laser diode.

9. The simulated laser light system as in claim 6, wherein said light source is a laser.

10. The simulated laser light system as in claim 6, wherein said light source is an electrical arc light.

11. The simulated laser light system as in claim 6, wherein said light source is an incandescent light.

12. The simulated laser light system as in claim 6, wherein the prismatic element is an elongated tapered member.

13. The simulated laser light system of claim 6, wherein a diameter of the observed light is less than an outside diameter of the prismatic element.

14. The simulated laser light system of claim 6, wherein the prismatic element includes a reflective end feature on at least one end of the prismatic element.

15. The simulated laser light system of claim 14, wherein the reflective end feature is an integrally molded hollow cone.

16. The simulated laser light system of claim 15, wherein the hollow cone reflective end feature is an acute cone.

17. The simulated laser light system of claim 15, wherein the reflective end feature includes an outer conical surface and an inner conical surface inverted within the outer conical surface.

18. The simulated laser light system of claim 14, wherein the prismatic element includes reflective end features at two ends of the prismatic element.

19. The simulated laser light system of claim 6, wherein the light source is a flashlight.

20. The simulated laser light system of claim 6, wherein the light source and molded prismatic element are incorporated in a writing implement.

21. The simulated laser light system of claim 6, wherein the light source and molded prismatic element are positioned on a vehicle wheel.

22. The simulated laser light system as in claim 6, wherein a diameter of the observed light is less than an outside diameter of the prismatic element.

23. A simulated laser light system comprising:

a light source which emits substantially parallel light rays; and

a prismatic element having a plurality of prismatic surfaces and a centerline, said prismatic surfaces defining a curved surface, said prismatic surfaces being on the inside or the outside of the prismatic element, the prismatic surfaces redirecting the light rays to be emitted from the prismatic element in a plurality of planes which are perpendicular to a tangent to said curved surface and extend through the centerline;

wherein the prismatic element acts as a filter to extract non-parallel light rays.

24. A toy comprising:

a toy body;

a light source mounted on the toy body; and

an elongated prismatic element having a plurality of curved prismatic surfaces, the prismatic element redirecting light from the light source in a plurality of planes which intersect at a centerline of the prismatic element causing the light emitted from the prismatic element to appear to an observer to be emitted from approximately the centerline of the prismatic element.

25. An optical light pipe comprising:

a cylindrical prismatic element having an outer diameter;

a light source directing light into the cylindrical prismatic element; and

a plurality of prismatic surfaces on the prismatic element for reflecting and refracting the light emitted by the light source substantially radially from the prismatic element to create an observed beam of radial light with a diameter which is smaller than the outer diameter of the prismatic element when the prismatic element is viewed at any position 360 degrees around the light pipe.

26. The optical light pipe as in claim 25, wherein the diameter of the observed beam is less than one half of the outer diameter of the prismatic element.

27. The optical light pipe as in claim 25, wherein the light source emits light of substantially the same wavelength to give the appearance of a colored laser light beam.

28. The optical light pipe as in claim 25, wherein the prismatic element also emits an axial beam of light which appears to the observer to be substantially parallel to and extend from the observed beam of radial light.

29. An optical element comprising:

a semiconductor diode;

a cylindrical prismatic element encapsulating the semiconductor diode, the prismatic element having an outer diameter; and

a plurality of prismatic surfaces on the prismatic element for reflecting and redirecting light emitted by the semiconductor diode substantially radially from the prismatic element to create an observed beam of light with a diameter which is smaller than the outer diameter of the prismatic element when the prismatic element is viewed from a side.

30. The optical element of claim 29, wherein the outer radius is constant for 360 degrees around the central axis of the prismatic element.

31. The optical element of claim 29, wherein the outer radius is not constant around 360 degrees of the central axis of the prismatic element.

32. The optical element of claim 29, wherein the prismatic element includes reflective end features at opposite ends of the prismatic element.