Patent ID: 9001030
Filing Date: 2015-04-07
Classification: G02B,G06F,G06T

Abstract:
1. An apparatus comprising: a light guide including a proximal end, a distal end, a front surface and a back surface spaced apart from the front surface, an ambient input region on the front surface near the distal end, and an input/output region on the back surface near the distal end; a display unit positioned near the proximal end; an eye-measurement camera positioned at or near the proximal end to image eye-measurement radiation; a proximal optical element positioned in the light guide near the proximal end and a distal optical element positioned in the light guide near the distal end, wherein the proximal optical element is optically coupled to the display unit, the eye-measurement camera and the distal optical element such that it directs display light to the distal optical element and directs eye-measurement radiation received from the distal optical element to the eye-measurement camera, wherein the distal optical element is optically coupled to the proximal optical element, the ambient input region and the input/output region such that it directs display light to the input/output region and directs eye-measurement radiation from the input/output region to the proximal optical element, and wherein the proximal optical element and the distal optical elements are polarizing beamsplitters.