权利要求：
CLAIMS
1. A lighting device including: at least one light emitter, at least one light source, and at least one light conductor arranged to conduct light from the light source to the light emitter; the light emitter including a translucent body and a first reflector, the first reflector being connected to or integral with the translucent body;
the translucent body including at least a first emitter portion, the first emitter portion being shaped to define a first emitter lens;
the first reflector being arranged to reflect light emitted from the light conductor to exit the light emitter as a beam of light via the first emitter lens;
the light emitter being rotatable with at least one degree of freedom relative to the light conductor to direct the beam.
2. A lighting device according to claim 1, wherein the light emitter is rotatable with at least two degrees of freedom relative to the light conductor.
3. A lighting device according to claim 1, wherein the first emitter lens is convexly curved without inflections and defines a first emitter axis, and the first emitter lens extends over at least most of a total section area of the light emitter normal to the first emitter axis when viewed along the first emitter axis.
4. A lighting device according to claim 3, wherein the first emitter lens is spherically curved. 5. A lighting device according to claim 1, wherein the translucent body includes a first incident portion arranged to conduct light emitted from the light conductor to the first reflector.
6. A lighting device according to claim 5, wherein the first incident portion is shaped to define a first incident lens.
7. A lighting device according to claim 6, wherein the first incident lens is convexly curved without inflections and defines a first incident axis, and the first incident lens extends over at
least most of a total section area of the light emitter normal to the first incident axis when viewed along the first incident axis.
8. A lighting device according to claim 7, wherein the first incident lens is spherically curved.
9. A lighting device according to claim 6, wherein the lighting device includes a support element, and at least one of the first incident lens and the first emitter lens is slidably mounted on the support element to support the light emitter in rotation with at least two degrees of freedom relative to the support element.
10. A lighting device according to claim 9, wherein the support element defines a circular aperture, and the light emitter is mounted for rotation in the aperture. 11. A lighting device according to claim 9, wherein the lighting device includes a plurality of said light emitters, each light emitter being rotatable independently of the others.
12. A lighting device according to claim 11, wherein the support element is a sheet, and each light emitter is arranged to extend through an aperture in the sheet; and the lighting device includes fixing means for fixing the sheet in a horizontal use position beneath a horizontal surface in spaced relation to the horizontal surface.
13. A lighting device according to claim 8, wherein the support element comprises a body material and a bearing material which is relatively softer or has a lower coefficient of friction than the body material, the bearing material being arranged in sliding contact with the curved surface.
14. A lighting device according to claim 13, wherein the support element comprises the light conductor, and the bearing material is translucent and is arranged to conduct light from the body material to the first incident lens.
15. A lighting device according to claim 1, wherein the light emitter includes a second reflector and the translucent body includes a second emitter portion which is shaped to define a
second emitter lens, the second reflector being arranged to reflect the light emitted from the light conductor to exit the light emitter as a beam of light via the second emitter lens.
16. A lighting device according to claim 15, wherein the light emitter is rotatable relative to the light conductor to reflect light emitted from the light conductor selectively from the first and second reflectors.
17. A lighting device according to claim 15, wherein the light emitter is arranged to reflect light emitted from the light conductor simultaneously from the first and second reflectors.
18. A lighting device according to claim 15, wherein the translucent body includes a first incident portion arranged to conduct light emitted from the light conductor to the first reflector,
and a second incident portion arranged to conduct light emitted from the light conductor to the second reflector.
19. A lighting device according to claim 18, wherein the first incident portion is shaped to define a first incident lens, and the second incident portion is shaped to define a second incident lens.
20. A lighting device according to claim 19, wherein the first and second incident lenses are defined by two respective portions of one incident surface having continuous spherical curvature which extends across both of the incident lenses. 21. A lighting device according to claim 20, wherein the lighting device includes a support element, and the incident surface is slidably mounted on the support element to support the light emitter in rotation with at least two degrees of freedom relative to the support element.
22. A lighting device according to claim 21, wherein the support element defines a circular aperture, and the light emitter is mounted for rotation in the aperture.
23. A lighting device according to claim 21, wherein the lighting device includes a plurality of said light emitters, each light emitter being rotatable independently of the others.
24. A lighting device according to claim 23, wherein the support element is a sheet, and each light emitter is arranged to extend through an aperture in the sheet; and the lighting device includes fixing means for fixing the sheet in a horizontal use position beneath a horizontal surface in spaced relation to the horizontal surface.
25. A lighting device according to claim 1, wherein the translucent body includes a curved surface,
and the lighting device includes at least one support element,
and the curved surface is slidably mounted on the support element to support the light emitter in rotation with at least one degree of freedom relative to the support element.
26. A lighting device according to claim 25, wherein the curved surface is spherically curved, and the light emitter is rotatable with at least two degrees of freedom relative to the support element.
27. A lighting device according to claim 26, wherein the support element defines a circular aperture,
and the translucent body is mounted for rotation in the circular aperture.
28. A lighting device according to claim 27, wherein the spherically curved surface slidably engages the support element at a periphery of the aperture.
29. A lighting device according to claim 25, wherein the support element comprises the light conductor.
30. A lighting device according to claim 25, wherein the support element is a sheet, and the light emitter is arranged to extend through an aperture in the sheet. 31. A lighting device according to claim 25, wherein the support element comprises a body material and a bearing material which is relatively softer or has a lower coefficient of friction than the body material, the bearing material being arranged in sliding contact with the curved surface.
32. A lighting device according to claim 31, wherein the support element comprises the light conductor, and the bearing material is translucent and is arranged to conduct light from the body material to the translucent body.
33. A lighting device according to claim 25, wherein the lighting device includes a plurality of said light emitters, each light emitter being rotatable independently of the others.
34. A lighting device according to claim 33, wherein the support element is a sheet, and each light emitter is arranged to extend through an aperture in the sheet; and the lighting device includes fixing means for fixing the sheet in a horizontal use position beneath a horizontal surface in spaced relation to the horizontal surface. 35. A lighting device according to claim 1, wherein the first reflector is located within the translucent body
36. A lighting device according to claim 1, wherein the translucent body is spherical 37. A lighting device according to claim 1, wherein the light conductor is internally reflective.
38. A lighting device according to claim 1, wherein the light conductor is a body of solid translucent material.
39. A lighting device according to claim 1, wherein the light emitter is arranged in contact with the light conductor.
40. A lighting device according to claim 1, wherein the light emitter is spaced apart from the light conductor.
41. A lighting device according to claim 1, wherein the light emitter is spaced apart from the light conductor by an adjustable distance, and an adjustment means is provided for varying the distance. 42. A lighting device according to claim 1, wherein an object is arranged between the light conductor and the light emitter, and the lighting device is arranged to project an image of the object onto a target surface.
43. A lighting device according to claim 1, wherein the light conductor has a non-circular cross section which defines a cross section of the beam.
44. A lighting device according to claim 1, wherein a shell is arranged around the light conductor, the shell comprising a solid translucent material and having an outer surface, and the shell is arranged to conduct and to scatter from its outer surface a portion of the light from the light source.
45. A lighting device according to claim 1, wherein the lighting device includes an actuator for rotating the light emitter relative to the light conductor. 46. A lighting device according to claim 1, wherein the lighting device includes a base and the light source is arranged at the base, and in a normal use position the light conductor extends vertically upwardly from the base and the light emitter is supported above an upper end of the light conductor. 47. A lighting device according to claim 1, wherein the lighting device includes a plurality of said light emitters, each light emitter being rotatable independently of the others.
48. A lighting device according to claim 1, wherein the light emitter includes a textured surface region which is engageable by the user to rotate the light emitter.
49. A lighting device according to claim 1, wherein the first reflector is arranged to reflect a first portion of the light emitted from the light conductor in a first direction to form the beam,
and to allow a second portion of the light emitted from the light conductor to travel past or through the reflector in a second direction to form a second beam.
50. A lighting device according to claim 49, wherein in a use position the first beam is directed generally downwardly and the second beam is directed generally upwardly.
51. A lighting device according to claim 1, wherein the at least one light conductor comprises a first light conductor and a second light conductor, and the first reflector is arranged to reflect light emitted from the first and second light conductors to exit the light emitter, respectively as a first beam and a second beam via the first emitter lens.
52. A lighting device according to claim 51, wherein the second beam is arranged to surround the first beam. 53. A lighting device according to claim 51, wherein the light emitter is spaced apart from at least one of the first and second light conductors by an adjustable distance, and an adjustment means is provided for varying the distance between the light emitter and a respective one of the first and second light conductors without varying a distance between the light emitter and the other respective one of the first and second light conductors.
54. A lighting device according to claim 1, wherein the lighting device includes a light detector, the light detector being arranged to receive light which enters the light emitter via the first emitter lens and is reflected by the first reflector.
55. A lighting device according to claim 54, wherein the lighting device includes an additional light conductor for conducting said light which enters the light emitter via the first emitter lens and is reflected by the first reflector to the light detector.