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US 2003/0076237 A1Published application
Signaling device for traffic signals
AssigneeOSRAM GmbH
InventorSimon Blumel
Life of this patent
Estimating the term…
Abstract
A signaling device includes a light source and a Fresnel optical system. Constructed in the form of ellipses on its rear side, the Fresnel optical system has defocusing lenses that form elongated focal areas in the focal plane. Despite the use of a light source of small lateral extent, the signaling device has a radiation characteristic with a large aperture angle.
Claims20
A signaling device for traffic signals, comprising:
- a light source;
- and
- a collimator associated with said light source, said collimator having a surface facing said light source, said surface having contiguously disposed scattering elements formed as prominences elongated in a direction along said surface.
A signaling device, comprising:
- a light source;
- and
- a collimator associated with said light source, said collimator having a surface facing said light source, said surface having contiguously disposed scattering elements formed as prominences elongated in a direction along said surface.
In a signaling device having a light source, a focusing device, comprising:
- a collimator associated with said light source, said collimator having a surface facing said light source, said surface having contiguously disposed scattering elements formed as prominences elongated in a direction along said surface.
Dependencies are inferred from the claim text.