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US 9,285,526 B2Granted
Lighting fixture having an optical wave guide and a descartes lens or descartes reflector
AssigneeOSRAM GmbH
InventorsUlrich Hartwig, Matthias Morkel, Henning Rehn
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Abstract
A light guiding structure comprising a light guiding element (2) optically connected to a light source (6) and an optical element (10) coupled thereto, wherein the surface of the optical element (10) remote from the light guiding element (2) has the shape of a section (11) of a rotational ellipsoid, wherein a geometric cutting plane of the section (11) extends approximately at right angles to the longitudinal axis of the rotational ellipsoid.
Claims8
A light guiding structure comprising:
- a light source that outputs a light;
- a light guiding element optically connected to the light source;
- an optical element coupled to the light guiding element,
- wherein a surface of the optical element remote from the light guiding element has a shape of a section of a rotational ellipsoid,
- wherein a geometric cutting plane of the section extends approximately at right angles to a longitudinal axis of the rotational ellipsoid,
- wherein the light guiding element is approximately rod-shaped and has a light admitting aperture optically connected to the light source and a light emitting aperture coupled to the optical element,
- wherein the optical element has a hemispherical section facing the light guiding element;
- and
- a reflector at least partially encompasses the hemispherical section,
- wherein a section of the surface of the optical element is mirrored to reflect substantially all of the light from the light source towards the reflector.
7 more elements
Dependencies are inferred from the claim text.