System and method for color mixing lens array
First Claim
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1. An optical system comprising:
- a base;
a housing coupled to the base, the housing having a set of outer sidewalls;
an array of LEDs disposed in the housing;
a lens array optically coupled to the array of LEDs, the lens array further comprising a set of lenses disposed in the housing, wherein;
each lens in the set of lenses is positioned to receive light from a corresponding LED and is separated from the corresponding LED by a gap;
each lens in the set of lenses is configured to project a majority of light entering the lens in a selected half angle in a rectangular illumination pattern; and
the lenses in the set of lenses are spaced so that illumination patterns from the lenses overlap to produce a rectangular overall illumination pattern in the selected half angle, the illumination pattern with an overlap area;
a lens cover coupled to the housing; and
an encapsulant disposed between each LED and corresponding lens.
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Abstract
Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The optical units are spaced so that the individual illumination patterns overlap to create an overall illumination pattern with an overlap area. In the overlap area, the colors emitted by the individual optical units mix to create a desired color. Embodiments of optical systems can provide beam control so that the optical units emit a high percentage of light in beam.
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Citations
17 Claims
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1. An optical system comprising:
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a base; a housing coupled to the base, the housing having a set of outer sidewalls; an array of LEDs disposed in the housing; a lens array optically coupled to the array of LEDs, the lens array further comprising a set of lenses disposed in the housing, wherein; each lens in the set of lenses is positioned to receive light from a corresponding LED and is separated from the corresponding LED by a gap; each lens in the set of lenses is configured to project a majority of light entering the lens in a selected half angle in a rectangular illumination pattern; and the lenses in the set of lenses are spaced so that illumination patterns from the lenses overlap to produce a rectangular overall illumination pattern in the selected half angle, the illumination pattern with an overlap area; a lens cover coupled to the housing; and an encapsulant disposed between each LED and corresponding lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification