Wearable 3D augmented reality display
A proof-of-concept monocular prototype of an InI OST-HMD according to the configuration of FIG. 6C was implemented using off-the-shelf optical components, FIG. 8. A micro-lens array (MLA) of a 3.3 mm focal length and 0.985 mm pitch was utilized. (These types of microlenses can be purchased from Digital Optics Corp, SUSS Microoptics, etc.) The microdisplay was a 0.8″ organic light emitting display (OLED), which offered 1920×1200 color pixels with a pixel size of 9.6 μm. (EMA-100820, by eMagin Corp, Bellevue, Wash.) A freeform eyepiece along with a see-through corrector were used of the type disclosed in International Patent Application No. PCT/US2013/065422, the entire contents of which are incorporated herein by reference. The specifications of the eyepiece 640 and corrector 650 are provided in the tables below. The eyepiece offered a field of view of 40 degrees and approximately a 6.5 mm eyebox. Due to the strict telecentricity of the eyepiece design, it was adapted to the InI setup with reasonably low crosstalk but with a narrow viewing zone. It is worth noting that adapting this particular freeform eyepiece design is not required for implementing the optical method described in this invention. Alternative eyepieces may be designed and optimized for this purpose.