Patent ID: 9720234
Date: 2017-08-01
CPC Classifications: B32B,G02B,G02F,G06F,G06K,G06T,H04N

Claim:
1. A head worn display for displaying a displayed image overlaid onto a see-through view of a surrounding environment that includes multiply folded optics, comprising: a solid prism with a concave image light input optically powered surface, a concave image light output optically powered surface, and a planar surface that provides an internal fold of an optical axis of an image light associated with the displayed image, wherein an image source projects image light into the input power surface towards the planar surface, and wherein the image light transmits through the output power surface; a combiner that provides a second fold the optical axis associated with the image light, wherein the combiner combines the displayed image and light from the surrounding environment; and wherein a flat plate reflector is bonded to the planar surface of the solid prism to provide an optically flat reflective surface to the solid prism, wherein the image light reflects off the flat reflector plate directly towards the output power surface.