LIGHTING DEVICE FOR PROJECTING A GOBO IMAGE
A lighting device includes an LED light source for emitting light in a first direction about an axis, a projection lens mounted on the axis, and a gobo having a preselected design which is mountable along the axis between the LED light source and lens to intercept at least some of the emitted light. The lens is moveable along the axis, preferably positionable at least at three axial positions. The first such axial position is the distance from the LED light source corresponding to the focal point of the lens. The second axial position is the distance from the gobo corresponding to the focal point of the lens. The third axial position is a distance from the LED light source corresponding to less than the focal point of the lens. In one embodiment, the lighting device includes a recycling collar having a central opening through which the axis extends. In another embodiment, the projection lens is a TIR lens.
1 . A lighting device comprising an LED light source for emitting light in a first direction about an axis; a projection lens mounted on said axis; and a gobo having a preselected design which is mountable along said axis between said LED light source and said lens to intercept at least some of the emitted light; wherein said lens is moveable along said axis.
2 . The lighting device of claim 1 , wherein said lens is positionable at least at two axial positions, one of which is distance from the LED light source corresponding to the focal point of the lens, and another of which is the distance from the gobo corresponding to the focal point of the lens.
3 . The lighting device of claim 2 , wherein said lens is positionable at least at three axial positions, the third such axial position being a distance from the LED light source corresponding to less than the focal point of the lens.
4 . The lighting device of claim 3 , further comprising a recycling collar centered on said axis for reflecting larger angle emitted beams of light from said LED light source back on said LED light source, and having an opening centered on said axis for passing lower angle emitted beams of light from said LED light source; wherein said gobo is mountable in said center opening.
5 . The lighting device of claim 4 , further comprising a field lens positioned on said axis between said gobo and said reflective lens.
6 . The lighting device of claim 2 , wherein said projection lens is a TIR lens having an inner opening surrounded by an annular, outer opening.
7 . The lighting device of claim 1 , wherein said device is a flashlight having a battery or other portable power source for powering the LED light source.