Color mixing optics for LED illumination device

An illumination device comprising an emitter module having a plurality of emission LEDs mounted onto a substrate and encapsulated within a primary optic, wherein the plurality of emission LEDs are spatially divided into N blocks, wherein N is an integer value greater than or equal to 3, wherein each block consists of N LEDs each configured for producing a different color of light, wherein the N LEDs within each block are arranged to form a polygon having N sides, and wherein the N blocks of LEDs are arranged in a pattern on the substrate to form an outer polygon having N sides;

• wherein the N blocks are arranged on the substrate, such that:
• one LED within each block is located on a different vertex of an inner polygon having N sides, wherein the LEDs located on the vertices of the inner polygon are each configured to produce a different color of light;
• and
• remaining LEDs within each block are located along the N sides of the outer polygon, wherein the LEDs located along each side of the outer polygon are each configured to produce a different color of light;
• wherein if N=4, the four LEDs within each block are arranged to form a square, and
• wherein the inner polygon is a square, and wherein the outer polygon is a square.

An illumination device, comprising:

• a plurality of emission LEDs mounted onto a substrate and configured to produce illumination for the illumination device, wherein the plurality of emission LEDs are arranged in a pattern on the substrate to form an outer polygon having N sides, wherein N is an integer value greater than or equal to 3;
• a primary optic encapsulating the plurality of emission LEDs and configured to transmit a majority of the illumination produced by the emission LEDs;
• and
• N photodetectors mounted onto the substrate and encapsulated within the primary optic, wherein the N photodetectors are arranged around a periphery of the outer polygon, such that the N photodetectors are placed near a center of the N sides of the outer polygon, and wherein the N photodetectors are electrically connected in parallel to receiver circuitry of the illumination device for detecting a portion of the illumination that is emitted by the emission LEDs and/or reflected by the primary optic.