ew being focused by said focusing lens on said image capture device, wherein said diffractive element alters a phase ?? of energy passing therethrough according to the following equation: ??=A1??2+A2??4; where ?? is a radial aperture coordinate divided by 1 mm, A1 is a constant within a range of approximately 15 to 55 and A2 is a constant within a range of approximately ???0.01 to ???0.5.