Emitter module for an LED illumination device

An illumination device comprising one or more emitter modules, wherein each emitter module comprises:

• a plurality of light emitting diodes (LEDs) configured for producing illumination for the illumination device;
• one or more photodetectors configured for detecting the illumination produced by the plurality of LEDs;
• a multiple layer substrate upon which the plurality of LEDs and the one or more photodetectors are mounted;
• a primary optics structure coupled to a top surface of the multiple layer substrate for encapsulating the plurality of LEDs and the one or more photodetectors within the primary optics structure;
• and
• a heat sink coupled to a bottom surface of the multiple layer substrate;
• and
• wherein the multiple layer substrate comprises:
• a first routing layer coupled to electrical contacts of the plurality of LEDs and the one or more photodetectors;
• a first dielectric layer coupled to a bottom surface the first routing layer and configured for providing electrical isolation between the electrical contacts and the heat sink;
• a second routing layer coupled to a bottom surface of the first dielectric layer and configured for routing signals between the first routing layer and external electrical contacts arranged outside of the primary optics structure;
• and
• a second dielectric layer coupled to a bottom surface of the second routing layer and configured for providing a relatively high thermal impedance in a lateral direction, and a relatively low thermal impedance in a vertical direction.