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 curved portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, wherein one of the curved portions is centered about a radius R extending from a first center point located directly above a first imaginary light point source positioned on a first lateral side of the LED and the other one of the curved portions is centered about a radius R extending from a second center point located directly above a second imaginary light point source positioned on a second lateral side of the LED, andwherein each curved portion has a spherical or an aspheric shape relative to its respective LED light source.
5 Assignments
0 Petitions
Accused Products
Abstract
An array of LEDs (30) is provided having a lens array (34) for collecting divergent light from each LED (30). Each lens (34) in the array is associated with a respective LED (30) and has a compound shape including a curved surface (40) that may be spherical or may have an offset aspherical shape. The curved surfaces (40) are centered about each side of its associated LED (30). The lens (34) may alternatively include faceted surfaces (46) that approximate the curved lens surface.
154 Citations
21 Claims
-
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 curved portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, wherein one of the curved portions is centered about a radius R extending from a first center point located directly above a first imaginary light point source positioned on a first lateral side of the LED and the other one of the curved portions is centered about a radius R extending from a second center point located directly above a second imaginary light point source positioned on a second lateral side of the LED, and wherein each curved portion has 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, 12)
-
-
13. A method of manufacturing an LED light module, comprising:
-
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 at least two curved portions separated by a flat portion that is distributed around an LED arranged to collimate the light from the LED, and the lens being disposed over an LED so that light from each side of the LED is projected into a respective curved surface; and one of the curved portions is centered about a radius R extending from a first center point that lies directly above a first imaginary light point source positioned on a first lateral one side of the LED and the other one of the curved portions is centered about a radius R extending from a second center point located directly above a second imaginary light point source positioned on a second lateral side of the LED. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
-
Specification