Illumination system
AssigneeHeptagon Oy
InventorsDaniel Dias, Ville Kettunen, Markus Rossi
Life of this patent
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Abstract
An illumination system including at least one light source such as an electroluminescent element, e.g. a light emitting diode (LED), and at least one optical element whose surface is structured by diffraction and/or refraction type optical microstructures. In order to shape the beam, the optical element includes at least two sections whose optical microstructures and therefore optical properties are different from one another. The pattern of the microstructures in each of the at least two sections is, at least over a predetermined angular range, rotationally symmetric with respect to the optical axis or another symmetry axis.
Claims30
An illumination system comprising at least one light source (1) and at least one optical element (2) that influences light emitted by the at least one light source (1), the light source (1) and the optical element (2) being arranged along an optical axis (3), wherein the optical element (2) has a first surface (4) directed towards the light source (1) and a second surface (5) pointing away from the light source (1), wherein at least one of said first and second surfaces (4;
- 5) is structured by means of at least one of diffraction and refraction type optical microstructures (10, 10′), and wherein the optical element (2) comprises at least two sections (11-26) whose optical microstructures (10, 10′) are different from one another, characterized in that a pattern of the optical microstructures in each of the at least two sections is, at least over a predetermined angular range, rotationally symmetric with respect to at least one symmetry axis.
Optical element that influences light emitted by at least one light source, wherein the optical element has a first surface and a second surface, wherein at least one of said first and second surfaces is structured by means of at least one of diffraction type and refraction type optical microstructures, and wherein the optical element comprises at least two sections whose optical microstructures are different from one another, characterized in that each section has the shape of at least one of a circular disc, a circular ring, a sector of a circular disc, a sector of a circular ring, a stripe with two parallel straight bordering lines, and segments of such shapes.
Dependencies are inferred from the claim text.