Light assembly
A light assembly includes a laser light emitting diode for emitting a light beam along an axis and a diffusing assembly for deflecting the light beam substantially 360 degrees around the axis. The diffusing assembly includes a light diffuser for receiving and scattering a light beam emitted from the diode, a phosphor tube for further scattering the light emitted from the diffuser, and a mirror for returning any light with is not deflected radially through the phosphor tube back into the phosphor tube. The deflector has a reflective end surface to allow the light repeated passes thorough the phosphor tube until it escapes radially through the tube.
1. A light assembly comprising a laser diode for emitting a light beam along an axis, a diffusing assembly for deflecting the light beam generally radially outwardly from the axis in multiple directions, and a lens positioned on the axis adjacent the laser diode, the lens axially spaced from the diffusing assembly, the diffusing assembly comprising:
an axially extending diffuser having a light entrance end and a light emitting end, the light emitting end having a reflective light diffusing surface,
an axially extending tube having first and second axially spaced end portions, wherein the light emitting end of the diffuser is positioned within the first end portion of the tube, and
a mirror positioned within the second end portion of the tube, the mirror having a light reflective surface facing the light emitting end of the diffuser, the mirror being axially spaced from the light emitting end of the diffuser, whereby light emitted from the diffuser is exposed to the tube before it reaches the reflective surface of the mirror.
2. The light assembly of claim 1 wherein the diffusing assembly deflects the light beam radially outwardly substantially 360 degrees around the axis.
3. The light assembly of claim 2 wherein the tube comprises a cylindrical glass tube having a ceramic phosphor coating.
4. The light assembly of claim 3 wherein the ceramic phosphor coating is on the inside cylindrical surface of the tube.
5. The light assembly of claim 3 further comprising a hollow Quartz glass sleeve surrounding the phosphor tube.
6. The light assembly of claim 1 wherein the tube is coated with phosphor.
7. The light assembly of claim 6 wherein the diffuser is comprised of glass and the mirror reflective surface is comprised of metal.
8. The light assembly of claim 1 wherein the light diffusing surface comprises a convex elliptical shape.
9. The light assembly of claim 1 wherein the light reflecting mirror surface is etched with a micro pattern.
10. The light assembly of claim 1 further comprising a second laser diode and a beam combiner for combining the light beam and a second light beam from a second laser diode into a substantially single beam.
11. The light assembly of claim 1 wherein the light diffusing surface comprises a concave elliptical shape.
12. The light assembly of claim 1 wherein the light entrance end of the diffuser has a planar surface extending generally perpendicular to the axis.
13. The light assembly of claim 1 further comprising an axially extending channel between the lens and the diffusing assembly.
14. A vehicle lighting assembly comprising a base, a laser diode mounted on the base, the laser diode for emitting a light beam along an axis, a diffusing assembly for deflecting the light beam at an angle to the axis, a lens positioned on the axis adjacent the laser diode, the lens axially spaced from the diffusing assembly, and a reflector for redirecting light deflected by the diffusing assembly, the diffusing assembly comprising:
an axially extending diffuser having a light entrance end and a light emitting end, the light emitting end having a reflective light diffusing surface,
an axially extending tube having first and second axially spaced end portions, wherein the light emitting end of the diffuser is positioned within the first end portion of the tube, and
a mirror positioned within the second end portion of the tube, the mirror having a light reflective surface facing the light emitting end of the diffuser, the mirror being axially spaced from the light emitting end of the diffuser whereby light emitted from the diffuser is exposed to the tube before it reaches the reflective surface of the mirror.