Optical device and luminaire comprising said optical device
AssigneeAntares Iluminacion, S.A.U.
InventorFederico MARTINEZ WEBER
Life of this patent
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Abstract
The present invention relates to an optical device comprising a light source that in turn emits a light beam, and that enables a predetermined area to be illuminated with a very high degree of uniformity in a plane perpendicular to said optical device, such that the orientation of the light beam is changed, illuminating only said predetermined area, where, due to the low profile thereof, the optical device enables same to be integrated into a luminaire with a reduced height dimension, which is also object of the present invention.
Claims13
An optical device characterised in that it comprises:
- at least one light source (1) intended to radiate a light beam (2) in a first direction (W) that forms an angle (a) less than 90° with an essentially vertical downward direction (+Y);
- a lens (4) that in turn comprises:
- a first total internal reflection surface (5) through which the light beam (2) is reflected;
- and
- a second faceted surface (6) comprising at least one first step (7, 17) defining at least one first section (8) and one second section (9) of said second faceted surface (6), wherein the second surface faceted (6) is configured to refract the light beam (2);
- wherein the second faceted surface (6) forms at least an angle (β) greater than 90° or the conjugate thereof with the essentially vertical downward direction (+Y);
- a shielding device (10) defining therein an interior space wherein the lens (4) is at least partially confined.
The optical device according to any of the preceding claims, characterised in that the first total internal reflection surface (5) and the second faceted surface (6) are essentially confined in the interior space defined by the shielding device (10).
The optical device according to any of the preceding claims, characterised in that the shielding device (10) has the shape of a truncated cylinder comprising a straight base (11) and a surface of revolution (12), wherein the axis of the truncated cylinder is essentially parallel to the essentially vertical downward direction (+Y) and wherein the straight base (11) and the surface of revolution (12) define the interior space defined by the shielding device (10), wherein the surface of revolution (12) comprises an ellipse-shaped free edge (13), wherein a point (14) of the ellipse arranged at a greater height in the essentially vertical downward direction (+Y) is the point furthest from a predetermined area (20) to be illuminated.
The optical device according to any of the preceding claims, characterised in that the shielding device (10) has the shape of a truncated cylinder comprising a straight base (11) and a surface of revolution (12), wherein the axis of the truncated cylinder is essentially parallel to the essentially vertical downward direction (+Y) and wherein the straight base (11) and the surface of revolution (12) define the interior space defined by the shielding device (10).
The optical device according to any of the preceding claims, characterised in that the at least one light source (1) and the lens (4) can rotate about an axis essentially parallel to the essentially vertical downward direction (+Y), with respect to the shielding device.
The optical device according to any of the preceding claims, characterised in that the light beam (2) is below a cut-off angle of 75°.
A luminaire comprising at least one optical device according to any of the preceding claims.
Dependencies are inferred from the claim text.