Optical element including texturing to control beam width and color mixing

• US 9,022,601 B2
• Filed: 04/09/2012
• Issued: 05/05/2015
• Est. Priority Date: 04/09/2012
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Edmond, Mark, Dixon, Mark, Pickard, Paul, Lu, Dong Jenna
• Primary Examiner(s): Hollweg, Thomas A
• Application Number:
  US13/442,311
• Publication Number:
  US 20130265772A1
• Time in Patent Office: 1,121 Days
• Field of Search: 362/231, 362/237, 362/247, 359/336, 359/619, 359/708, 359/726
• US Class Current: 362/237
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0278 used in transmission

Abstract

A method for providing an optical element may include providing an optical feature in the optical element that spreads or distributes light passing through the optical element. The method may also include providing a texturing in at least a portion of the optical feature of the optical element.

Claims

1. A method for providing an optical element, comprising:

providing an optical feature in the optical element that spreads or distributes light passing through the optical element; and

providing a texturing in association with at least a portion of the optical feature of the optical element, the texturing comprising a multiplicity of surface texturing features each having a depth between about 0.0004 inches and about 0.0010 inches and the surface texturing features being the only surface texturing features used in providing the texturing in association with the optical element.

2. The method of claim 1, wherein providing the texturing comprises providing at least one of a predetermined beam angle, a predetermined color mixing and a predetermined beam shape smoothing of light passing through the optical element.

3. The method of claim 1, wherein providing the optical feature comprises providing a micro-optics array in the optical element, wherein the micro-optics array comprises a multiplicity of micro lenses.

4. The method of claim 3, further comprising providing the texturing in at least a portion of the micro-optics array.

5. The method of claim 4, wherein providing the texturing in at least the portion of the micro-optics array comprises providing a type texturing to provide at least one of a predetermined beam angle, a predetermined color mixing and a predetermined beam shape smoothing of the light passing through the optical element.

6. The method of claim 5, wherein providing the micro-optics array comprises providing a micro-optics array configured to spread the light passing through the optical element into a preset beam angle smaller than the predetermined beam angle.

7. The method of claim 3, further comprising providing the texturing in selected ones of the multiplicity of micro lenses.

8. The method of claim 1, wherein providing the texturing in association with at least a portion of the optical feature of the optical element comprises:

providing the texturing in a film; and

placing the film in association with the optical element after providing the texturing in the film.

9. The method of claim 1, wherein providing the texturing in association with at least a portion of the optical feature of the optical element comprises:

providing the texturing in another optical element; and

placing the other optical element relative to the optical element to pass light through both optical elements.

10. The method of claim 1, wherein the optical element is formed by a molding process, a tool used in molding the optical element being etched with a chosen surface texturing that provides the texturing in at least the portion of the optical feature of the optical element when molded.

11. The method of claim 1, wherein the optical feature is formed in one surface of the optical element and the texturing is formed directly in an opposite surface of the optical element.

12. The method of claim 1, wherein the texturing is on a front side and a back side of the optical element.

13. The method of claim 1, wherein the texturing is uniform.

14. The method of claim 1, wherein providing the optical feature comprises providing a multiplicity of repeating lens elements and providing the texturing comprises providing the multiplicity of surface texturing features directly in a surface of each of the multiplicity of repeating lens elements.

15. A method for providing a lighting device, comprising:

providing a light source;

providing an optical element that receives and transmits light from the light source;

providing an optical feature in the optical element that spreads or distributes the light passing through the optical element; and

providing a texturing in at least a portion of the optical feature, the texturing comprising a multiplicity of surface texturing features each having a depth between about 0.0004 inches and about 0.0010 inches and the surface texturing features being the only surface texturing features used in providing the texturing in association with the optical element.

16. The method of claim 15, wherein providing the optical element comprises providing a total internal reflector (TIR).

17. The method of claim 16, wherein the TIR comprises an exit surface, the exit surface comprising a first portion including a micro-optics array and a second portion comprising at least one lens arranged in relationship with the light source.

18. The method of claim 17, wherein providing the texturing comprising providing the texturing in at least one of the micro-optics array and the at least one lens.

19. The method of claim 16, wherein the TIR comprises at least one lobe arranged in relationship with the light source, the at least one lobe comprising a lens to transmit light from the light source.

20. The lighting device of claim 19, wherein providing the texturing comprises providing the texturing in the lens.

21. An optical element, comprising:

an optical feature in the optical element that spreads or distributes light passing through the optical element; and

a texturing in association with at least a portion of the optical feature, the texturing comprising a multiplicity of surface texturing features each having a depth between about 0.0004 inches and about 0.0010 inches and the surface texturing features being the only surface texturing features used in providing the texturing in association with the optical element.

22. The optical element of claim 21, wherein the texturing provides at least one of a predetermined beam angle, a predetermined color mixing and a predetermined beam shape smoothing of light passing through the optical element.

23. The optical element of claim 21, wherein the texturing comprises a surface finishing texture.

24. The optical element of claim 21, wherein the optical feature comprises a micro-optics array, the micro-optics array comprising a multiplicity of micro lenses.

25. The optical element of claim 24, wherein the texturing is provided in at least a portion of the micro-optics array.

26. The optical element of claim 21, further comprising a total internal reflector (TIR).

27. The optical element of claim 26, wherein the TIR comprises an exit surface, the exit surface comprising a first portion including a micro-optics array and a second portion comprising at least one lens arranged in relationship with a solid state light emitter.

28. The optical element of claim 27, wherein the at least one lens comprises a plurality of facets.

29. The optical element of claim 27, wherein at least one of the micro-optics array and the at least one lens comprises the texturing.

30. The optical element of claim 26, wherein the TIR comprises at least one lobe, the at least one lobe comprising a lens.

31. The optical element of claim 30, wherein the lens comprises an entrance surface and an exit surface, and wherein the lens receives light from a solid state light emitter and transmits the light to the exit surface.

32. The optical element of claim 31, wherein the lens comprises a plurality of facets.

33. The optical element of claim 30, wherein the lens comprises the texturing.

34. An optical system for a lighting device, comprising:

a first optical element;

an optical feature provided in the first optical element that spreads or distributes light passing through the first optical element;

a second optical element; and

a texturing in at least a portion of the second optical element, the texturing comprising a multiplicity of surface texturing features each having a depth between about 0.0004 inches and about 0.0010 inches and the surface texturing features being the only surface texturing features used in providing the texturing in association with the optical element.

35. The lens system of claim 34, wherein the second optical element comprises a film, wherein the film is placed in association with the first optical element.

36. A lighting device, comprising:

a light source;

an optical element that receives and transmits light from the light source;

an optical feature in the optical element that spreads or distributes the light passing through the optical element; and

a texturing in at least a portion of the optical feature, the texturing comprising a multiplicity of surface texturing features each having a depth between about 0.0004 inches and about 0.0010 inches and the surface texturing features being the only surface texturing features used in providing the texturing in association with the optical element.

37. The lighting device of claim 36, wherein the light source comprises a solid state light emitter.

38. The lighting device of claim 36, further comprising a reflector to reflect light from the light source.

39. The lighting device of claim 36, wherein the optical element comprises a total internal reflector (TIR).

40. The lighting device of claim 39, wherein the TIR comprises an exit surface, the exit surface comprising a first portion including a micro-optics array and a second portion comprising at least one lens arranged in relationship with the light source.

41. The lighting device of claim 40, wherein at least one of the micro-optics array and the at least one lens comprises the texturing.

42. The lighting device of claim 39, wherein the light source comprises at least one solid state light emitter and the TIR comprises at least one lobe arranged in relationship with the at least one solid state light emitter, the at least one lobe comprising a lens to transmit light from the at least one solid state light emitter.

43. The lighting device of claim 42, wherein the lens comprises the texturing.