Patent ID: 8992028
Filing Date: 2015-03-31
Classification: G02B,G03B,H04N

Abstract:
1. A projection system, comprising: a housing; a projector configured to scan one or more beams in a scan cone to create an image having a substantially infinite depth of focus, wherein the projector includes a scanning engine to scan the one or more beams in two dimensions, and wherein an angle of incidence between the scanning 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; and an optical device having major faces 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.