System and Method for Color Mixing Lens Array
First Claim
1. An optical system comprising:
- an array of LEDs, wherein each LED is disposed in an LED cavity;
a set of lenses optically coupled to the LED array, 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 light with a uniform profile in a selected half angle; and
the lenses in the set of lenses are spaced so that illumination patterns from the lenses overlap to produce an overall illumination pattern in the selected half angle with an overlap area having a uniform color profile.
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Accused Products
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.
87 Citations
20 Claims
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1. An optical system comprising:
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an array of LEDs, wherein each LED is disposed in an LED cavity; a set of lenses optically coupled to the LED array, 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 light with a uniform profile in a selected half angle; and the lenses in the set of lenses are spaced so that illumination patterns from the lenses overlap to produce an overall illumination pattern in the selected half angle with an overlap area having a uniform color profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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providing an optical system comprising; an LED array; a set of lenses optically coupled to the LED array, 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 light with a uniform profile in a selected half angle; and the lenses in the set of lenses are spaced so that illumination patterns from the lenses overlap to produce an overall illumination pattern in the selected half angle with an overlap area having a uniform color profile controlling the LEDs in the LED array to produce a desired uniform color in the overlap area. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification