Lighting system for generating surface or mid-air lighting effects
A lighting system, comprising: a light source ( 22 ) for generating a light source output; an optical system ( 24 ) for focusing the light source output to a beam control plane ( 26 ); a first lens system ( 28 ) for pre-shaping the light source output after the beam control plane; a first reflector ( 30 ), wherein the first lens system is adapted to direct light to the first reflector; a second reflector ( 32 ) for generating an output beam ( 34 ) from the light reflected by the first reflector; a beam control system ( 27 ) located at the beam control plane, wherein the beam control system includes a pixelated display device ( 27 c ) for providing pixelated modulation of the light passing through the display device, and wherein he first reflector and second reflector are selected from the group consisting of: the first reflector ( 30 ) is a hyperbolic mirror and the second reflector ( 32 ) is a parabolic mirror, the first reflector ( 30 ) is a hyperbolic mirror and the second reflector ( 32 ) is a hyperbolic mirror, the first reflector ( 30 ) and second reflector ( 32 ) are spherical mirrors and the first reflector ( 30 ) is a planar mirror and the second reflector ( 32 ) is a hyperbolic mirror.
1. A lighting system, comprising:
a light source for generating a light source output;
an optical system for focusing the light source output to a beam control plane;
a first lens system for pre-shaping the light source output after the beam control plane;
a first reflector, wherein the first lens system is adapted to direct light to the first reflector;
a second reflector for generating a collimated output beam from the light reflected by the first reflector;
a beam control system located at the beam control plane, wherein the beam control system includes a pixelated display device for providing pixelated modulation of the light passing through the display device, and
wherein the first reflector and second reflector are selected from the group consisting of: the first reflector is a hyperbolic mirror and the second reflector is a parabolic mirror, the first reflector is a hyperbolic mirror and the second reflector is a hyperbolic mirror, the first reflector and second reflector are spherical mirrors and the first reflector is a planar mirror and the second reflector is a hyperbolic mirror; and
wherein the first lens system, first reflector and second reflector are configured to function as a catadioptric optical system.
2. A system as claimed in claim 1 , wherein the beam control system comprises:
a color filter; or
a shape generating feature.
3. A system as claimed in claim 1 , wherein the pixelated display device comprises a liquid crystal panel, or a MEMs deformable mirror array.
4. A system as claimed in claim 1 , wherein the first lens system comprises a lens group of three lenses (L 1 , L 2 , L 3 ).
5. A system as claimed in claim 1 , wherein the first optical system comprises an ellipsoid reflector or a parabolic reflector, with the light source mounted at the focal plane of the reflector.
6. A system as claimed in claim 5 , wherein the light source comprises an arc lamp or an LED or LED arrangement.
7. A system as claimed in claim 1 , wherein the first optical system comprises a lens system at the output of the light source.
8. A system as claimed in claim 7 , wherein the light source comprises an array of LEDs and the lens system comprises a microlens array.
9. A system as claimed in claim 7 , wherein the light source comprises an annular array of LEDs.