Variable-beam light source with mixing chamber
First Claim
1. A light device for producing an output light beam, comprising:
- a first end;
a second end;
a longitudinal axis extending therebetween;
a light source assembly comprising a plurality of light sources arranged at the first end of the light device and configured to emit light towards the second end and parallel with the longitudinal axis;
a substrate upon which the light source assembly is disposed, the substrate and the light source assembly forming a first surface;
a chamber for mixing light emitted from the light source assembly, the chamber comprising a second surface that is located substantially at a focus of the reflecting optic;
a concave reflecting optic for redirecting light exiting the chamber and emitted onto the optic, the redirected light forming an output light beam, the chamber positioned between the light source assembly and the concave reflecting optic, wherein the concave reflecting optic comprises a series of adjacent parabolic segments each having a different aiming angle; and
driver circuitry for controlling drive currents to respective ones of the plurality of light sources individually or in groups thereof to thereby variably control a divergence of the output light beam, the output light beam exiting the second end of the light device.
6 Assignments
0 Petitions
Accused Products
Abstract
A light device and method for producing an output light beam are disclosed. A light source assembly comprising a plurality of light sources is arranged at the first end of the light device and emits light towards the second end and parallel with the longitudinal axis of the device. The device also has a chamber for mixing light emitted from the light source assembly; and a concave reflecting optic for redirecting light exiting the chamber and emitted onto the optic. The redirected light forms an output light beam. The device also has driver circuitry for controlling drive currents to the plurality of light sources individually or in groups thereof to thereby variably control a divergence of the output light beam.
44 Citations
23 Claims
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1. A light device for producing an output light beam, comprising:
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a first end; a second end; a longitudinal axis extending therebetween; a light source assembly comprising a plurality of light sources arranged at the first end of the light device and configured to emit light towards the second end and parallel with the longitudinal axis; a substrate upon which the light source assembly is disposed, the substrate and the light source assembly forming a first surface; a chamber for mixing light emitted from the light source assembly, the chamber comprising a second surface that is located substantially at a focus of the reflecting optic; a concave reflecting optic for redirecting light exiting the chamber and emitted onto the optic, the redirected light forming an output light beam, the chamber positioned between the light source assembly and the concave reflecting optic, wherein the concave reflecting optic comprises a series of adjacent parabolic segments each having a different aiming angle; and driver circuitry for controlling drive currents to respective ones of the plurality of light sources individually or in groups thereof to thereby variably control a divergence of the output light beam, the output light beam exiting the second end of the light device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of producing an output light beam, the method comprising:
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providing a light device having (i) a plurality of light sources arranged and configured to emit light in a direction parallel with a longitudinal axis, (ii) a chamber, and (iii) a concave reflecting optic for redirecting light exiting from the chamber and emitted onto the optic, wherein the concave reflecting optic comprises a series of adjacent parabolic segments each having a different aiming angle, and wherein the chamber comprises a first surface that is located substantially at a focus of the reflecting optic, the method comprising; driving the light sources to create a plurality of secondary light beams; mixing the plurality of secondary light beams in the chamber; and controlling drive currents to the light-emitting devices, individually or in groups thereof, based on distances of the devices from a center region of the devices so that the output light beam has a divergence variably determined, at least in part, by the controlled drive currents. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification