|United States Patent Application||20190041656|
|Ahmed; Khaled ; et al.||February 7, 2019|
DIFFRACTIVE OPTICAL ELEMENTS FOR WIDE FIELD-OF-VIEW VIRTUAL REALITY DEVICES AND METHODS OF MANUFACTURING THE SAME Abstract
Diffractive optical elements for wide field-of-view virtual reality devices and methods of manufacturing the same are disclosed. An example apparatus includes a substrate and a thin film stack including alternating layers of a first material and a second material. The thin film stack defines an annular protrusion. The annular protrusion has a stair-like profile. Top surfaces of separate ones of steps in the stair-like profile correspond to top surfaces of separate ones of the layers of the second material.
|Inventors:||Ahmed; Khaled; (Anaheim, CA) ; Khakifirooz; Ali; (Los Altos, CA) ; Majhi; Prashant; (San Jose, CA) ; Parikh; Kunjal; (San Jose, CA)|
|Filed:||June 28, 2018|