COLLECTION OPTICS FOR LED ARRAY WITH OFFSET HEMISPHERICAL OR FACETED SURFACES
First Claim
Patent Images
1. A lens array, comprising:
- multiple lenses in a monolithic structure, for collecting light from an array of multiple LED light sources;
wherein each LED light source emits divergent light,wherein for each LED light source there is a lens having a first surface with a compound shape of at least two faceted portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, wherein each faceted portion is centered about a radius R extending from a center point that lies directly above an imaginary light point source on one side of the LED with each faceted portion centered over the imaginary light point source on each side, andwherein each lens approximates a spherical or an aspheric shape relative to its respective LED light source.
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Abstract
An array of LEDs is provided having a lens array for collecting divergent light from each LED. Each lens in the array is associated with a respective LED and has a compound shape including a curved surface that may be spherical or may have an offset aspherical shape. The curved surfaces are centered about each side of its associated LED. The lens may alternatively include faceted surfaces that approximate the curved lens surface.
103 Citations
22 Claims
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1. A lens array, comprising:
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multiple lenses in a monolithic structure, for collecting light from an array of multiple LED light sources; wherein each LED light source emits divergent light, wherein for each LED light source there is a lens having a first surface with a compound shape of at least two faceted portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, wherein each faceted portion is centered about a radius R extending from a center point that lies directly above an imaginary light point source on one side of the LED with each faceted portion centered over the imaginary light point source on each side, and wherein each lens approximates a spherical or an aspheric shape relative to its respective LED light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing an LED light module, comprising:
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determining a configuration for an array of lenses so that there is a separate lens for each LED, wherein each lens has a first surface having a compound shape including a faceted portion that is distributed around an LED arranged to collimate the light from the LED, and wherein each lens having a compound shape that includes faceted portions separated by a flat portion, the lens being disposed over an LED so that light from each side of the LED is projected into a respective faceted surface; and each faceted portion is centered about a radius R extending from a center point that lies directly above an imaginary light point source on each one side of the LED with each faceted portion centered over the imaginary light point source on each side so that each faceted portion is effectively a plano-convex lens centered over a side of the LED. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification