Eye tracking system for VR/AR HMD units including pancake lens modules

A PSOG assembly for use with a VR wearable assembly, comprising:

• a display housing including a substantially cylindrical shape having an inner surface defining an interior cavity extending between a first end and second end;
• a micro-OLED display coupled to the display housing and positioned within the interior cavity adjacent the second end of the display housing;
• an eye tracking assembly coupled to the display housing and positioned adjacent the first end of the display housing, the eye tracking assembly including:
• a ring support frame coupled to the first end of the display housing;
• a first group of photosensors and light emitters mounted along a first side of the ring support frame;
• a second group of photosensors and light emitters mounted along a second side of the ring support frame opposite the first group of photosensors and light emitters;
• and
• a thermistor mounted to the ring support frame between the first and second group of photosensors and light emitters for sensing an ambient temperature adjacent the ring support frame;
• and
• a pancake lens mounted to the display housing and positioned within the interior cavity between the eye tracking assembly and the micro-OLED display.

A method of assembling a VR wearable assembly, comprising:

• assembling a PSOG assembly including:
• providing a display housing including a substantially cylindrical shape having an inner surface defining an interior cavity extending between a first end and second end;
• coupling an eye tracking assembly to the display housing positioned adjacent the first end of the display housing, the eye tracking assembly including:
• a ring support frame coupled to the first end of the display housing;
• a first group of photosensors and light emitters mounted along a first side of the ring support frame:
• a second group of photosensors and light emitters mounted along a second side of the ring support frame opposite the first group of photosensors and light emitters;
• and
• a thermistor mounted to the ring support frame between the first and second group of photosensors and light emitters for sensing an ambient temperature adjacent the ring support frame;
• coupling a pancake lens to the display housing positioned within the interior cavity adjacent the eye tracking assembly;
• and
• coupling a micro-OLED display to the display housing positioned within the interior cavity adjacent the second end of the display housing such that the pancake lens is orientated between the eye tracking assembly and the micro-OLED display;
• and
• coupling the assembled PSOG assembly to a rim of a wearable frame adapted to be worn over a patient's eyes.