> One of their patents mentions using stacked diffraction optical elements [DOE]. > http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=H.. http://appft

> One of their patents mentions using stacked diffraction optical elements [DOE]. > http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=H.. http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=H.... I believe this particular excerpt is referring to the use of the layered and controllable DOEs to curve light projected from their scanning fibers that ultimately forms the virtual object image on the retina, rather than using the DOEs to attenuate ambient light (see my reply to Kelsolaar above). However, if I'm interpreting their literature correctly, you are correct in that they are able to use (at least a portion of) these DOE layers to generate the moire patterns that will ultimately be capable of form black/clear image masks.