Patent ID: 8767306

Claim:
An optical system comprising: a display panel configured to generate a visible light pattern; an infrared light source configured to illuminate a viewing location with infrared light such that infrared light is reflected from the viewing location as reflected infrared light; a camera, wherein the camera is configured to image the viewing location based on the reflected infrared light; an image former optically coupled to the camera and the display panel, wherein the image former is configured to transmit the reflected infrared light through the image former to the camera, and wherein the image former is configured to reflect at least a portion of the visible light pattern to form a virtual image; and a proximal beam splitter, wherein the proximal beam splitter is configured to transmit light from a real-world environment through the proximal beam splitter to the viewing location, transmit the visible light pattern from the display panel to the image former, reflect the virtual image from the image former to the viewing location, and reflect the reflected infrared light from the viewing location to the image former.