Patent ID: 8439526
Filing Date: 2013-05-14
Classification: F21K,F21S,F21V,F21Y,G02B

Abstract:
1. A variable colour illumination apparatus, said apparatus comprising: an illumination output surface; one or more color illumination sources operating to illuminate at least one surface of a common luminous flux transforming and colour mixing element comprising an assembly of at least two coaxial rotational symmetry shapes, wherein the external surface of the internal rotational symmetry shape is a reflective surface and the internal surface of the external rotational symmetry shape is a reflective surface; and wherein the external surface of the internal rotational symmetry shape is facing the internal surface of the external rotational symmetry shape; and wherein the external surface of the internal rotational symmetry shape is separated from the internal surface of the external rotational symmetry shape so as to create a cavity through which light can propagate; and wherein the element is operative to transform the luminous flux provided by the illumination sources into a homogeneous illumination spot filling the illumination output surface.