Patent ID: 8038293
Filing Date: 2011-10-18
Classification: G02C

Abstract:
1. An optical system comprising: a vision device wearable by a user for seeing objects in a field of view (FOV), said vision device comprising a curved front section that defines a viewing axis along which the user sees straight ahead; and a curved anamorphic optical element having negative optical power and extending from a side edge of said front section that sideways distorts rays passing therethrough with an extended distortion greater than that of said front section and which enlarges said FOV, the extended distortion being at least 90° sideways with respect to said viewing axis, wherein said anamorphic optical element has a cross section profile of a high order aspheric shape, and wherein said cross section profile has an asphericity defined by: wherein Z—Sag of the surface X—Surface height c—Surface basic curvature k—Conic coefficient A-M—are 4th, 6th, nth order deformation coefficients respectively.