Datum structure for ensuring alignment with respect to a reflector assembly

• US 7,011,433 B2
• Filed: 01/30/2004
• Issued: 03/14/2006
• Est. Priority Date: 01/30/2004
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Howard, P. Guy, Koegler, John M.
• Primary Examiner(s): Sember, Thomas M.
• Assistant Examiner(s): Cranson, Jr., James W
• Application Number:
  US10/769,511
• Publication Number:
  US 20050168991A1
• Time in Patent Office: 774 Days
• Field of Search: 362/296, 362/341, 362/294, 362/288, 362/285, 362/418, 353/85, 353/98, 353/99, 353/119, 353/122
• US Class Current: 362/296.08
• CPC Class Codes: F21V 19/006 of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base of sources having contact pins, wires or blades F21V19/0005; of LEDs or sources mounted on printed-circuit board F21V19/001

Abstract

A reflector assembly includes a reflector in which a reflector opening is defined therein. The reflector assembly has a datum structure having a plurality of a datum surfaces coupled to the reflector opening. The datum structure is configured to align a lamp with respect to a focal point of the reflector.

Claims

1. A reflector, comprising:

a hyperbolic surface for reflecting light;

a focal point,

an opening for insertion of a light source having an origin of light emission; and

a datum structure for orienting said origin of light emission to said focal point wherein the datum structure includes;

first, second and third surfaces defining a first plane orthogonal to an insertion direction of said light source for limiting a travel of said light source in said insertion direction;

fourth and fifth surfaces for limiting a travel if said light source in a first direction orthogonal to said insertion direction; and

a sixth surface for limiting travel of said light source in a second direction orthogonal to said first direction and said insertion direction.

2. The reflector of claim 1, and wherein said datum structure further includes at least one beveled edge adjacent at least one of said fourth, fifth, or sixth surfaces to guide said light source to contact with at least one of said surfaces during an insertion operation.

3. The reflector of claim 1, and further comprising guide rails for orienting the light source in said first and second directions during an insertion operation.

4. The reflector of claim 1, and further comprising at least one bias member for biasing said light source relative to at least one of said first, second, third, fourth, fifth, or sixth surfaces.

5. The reflector of claim 1, further comprising a heat sink coupled to the hyperbolic surface.

6. The reflector of claim 1, wherein the opening for insertion further defines a guiding surface for orienting the light source in the first and second directions during insertion.

7. The reflector of claim 1, further comprising a latch for applying a bias force on the light source against the first, second and third surfaces.

8. The reflector of claim 1, further comprising electrical connections for interfacing with the light source to provide power to the light source.

9. The reflector of claim 1, wherein the datum structure is oriented around the opening of the reflector.

10. A reflector assembly, comprising:

a reflector having a reflector opening defined therein;

a datum structure having a plurality of a datum surfaces coupled to said reflector opening wherein said datum structure is configured to align a lamp with respect to focal point of said reflector.

11. The assembly of claim 10, further comprising biasing structure for maintaining said alignment.

12. The assembly of claim 11, wherein said biasing structure comprises a compliant biasing assembly coupled to said datum structure.

13. The assembly of claim 12, wherein said biasing structure comprises a plurality of biasing members.

14. The assembly of claim 11, wherein said biasing structure is configured to apply a biasing force to said lamp an x-y plane.

15. The assembly of claim 10, wherein said datum structure comprises x-axis, y-axis, and z-axis alignment surfaces.

16. The assembly of claim 10, wherein said datum structure comprises a plurality of datum surfaces disposed about a perimeter of said reflector opening.

17. The assembly of claim 10, wherein said datum structure comprises four protrusions including a first protrusion having a y-axis alignment surface, a second protrusion having y-axis alignment and z-axis alignment surfaces, a third protrusion having a z-axis alignment surface, and a fourth protrusion having x-axis and z-axis alignment surfaces.

18. The assembly of claim 10, further comprising a shroud coupled to said reflector having a guide channel defined therein for further guiding said lamp assembly during said placement operation.

19. The assembly of claim 17, wherein said guide channel further comprises a plurality of guide slots defined in opposing walls of said guide channel.

20. The assembly of claim 18, further comprising a latching assembly pivotingly coupled to said datum structure.

21. The assembly of claim 10, further comprising a plurality of power interconnects coupled to said reflector opening.

22. The assembly of claim 21, wherein said power interconnects comprise resilient power interconnects.

23. A reflector assembly, comprising:

a reflector having a focal point;

means for aligning a lamp with respect to said focal point wherein said means for aligning said lamp are coupled to said reflector; and

means for rotating said lamp 180 degrees in an plane orthogonal to a direction of insertion.

24. The assembly of claim 23, wherein said means for aligning said lamp comprises means for aligning said lamp in three dimensions.

25. The assembly of claim 23, wherein said reflector comprises an elliptical reflector.

26. The assembly of claim 23, wherein said reflector comprises a hyperbolic reflector.

27. A reflector, comprising:

a surface for reflecting light having a focal point,

an opening for insertion of a light source having an origin of light emission that has a fireball that elevates during operation; and

a datum structure having a plurality of datum surfaces coupled to the opening for orienting said fireball to said focal point when the fireball is elevated.

28. The reflector of claim 27 wherein the surface is one of a hyperbolic, a parabolic or an elliptical shape.

29. The reflector of claim 27 wherein the datum structure has,

a first surface, a second surface and a third surface that define a first plane;

a fourth surface and a fifth surface oriented in a second plane orthogonal to the first plane; and

a sixth surface oriented in a third plane orthogonal to both the first plane and the second plane.

30. The reflector of claim 27 wherein the datum structure is used to define a datum referenced to an offset from a center axis of the light source.

31. The reflector of claim 27 wherein the datum structure allows for 180 degree rotation of the light source with respect to the datum structure.

32. The reflector of claim 27 where in the datum structure includes at least one bias force to maintain proper alignment of the light source in at least one direction.

33. The reflector of claim 27, further including a housing assembly having guide rails to help orient the light source in at least one direction orthogonal to the first plane.