To beam power from a Dyson-Harrop satellite to Earth, one "would require stupendously huge optics, such as a virtually perfect lens between maybe 10 to 100 kilometres across," he says.

The perfect focusing concept is proposed in lenses made of Left handed materials (or negative index materials) by means of geometrical optics.

The scattering fields of a perfect conducting object are evaluated by the physical optics (PO) and half space dyadic Green's function.