Patent ID: 9217913
Filing Date: 2015-12-22
Classification: G02B,G03B,H04N

Abstract:
1. A projection system, comprising; a housing; an optical device comprising a first major face and a second major face, wherein the first major face and the second major face are decentered, non-radially symmetric, and separated by an optical device thickness that changes across the optical device; and a scanning projector configured to scan one or more beams in a scan cone through the optical device to form an image, wherein the scanning projector includes a projection engine to scan the one or more beams in two dimensions, and wherein an angle of incidence between the projection engine and a feed beam is great enough to cause keystone distortion of the image, the projection engine being mounted to the housing with a rotation relative to the housing to correct for the keystone distortion, the rotation of the projection engine causing smile distortion and anamorphic distortion; wherein the first major face and second major face of the optical device are each defined by a polynomial that is a function of two independent, transverse variables, wherein the polynomials are selected to cause the optical device to reduce the smile distortion and anamorphic distortion of the image.