Patent ID: 7397615
Filing Date: 2008-07-08
Classification: G02B

Abstract:
1. An apparatus for directing electromagnetic energy comprising an eye mirror with at least one first stage, with both at least one defining mirror and at least one defined mirror, each of which are axially symmetric about the common axis of symmetry of that eye mirror, and at least one source extending over an area or volume in which that source extends outside the aperture described by the leading edge of the, or the outermost, first stage defining mirror and a further defined mirror lies outside that aperture, a pair of defining rays respectively emanating from different points on or within said extended source and meeting at a point of intersection on that further defined mirror, each of said defining rays being of a defining wavelength, λ, said first defining ray being reflected from said further defined mirror and intersecting one of the defined mirrors of the eye mirror at a respective further point within the cone defined by the angular input aperture at that point, and said second defining ray being reflected from said further defined mirror and intersecting one of the defined mirrors of the eye mirror at a respective further point within the cone defined by the angular input aperture at that point, there being a total of two such defining rays for every point on the further defined mirror.