Optical system for a LED signal and wayside LED signal
AssigneeSiemens Mobility GmbH
InventorsAxel Beier, Volker Türck
Life of this patent
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Abstract
An optical system (100) for a light emitting diode (LED) signal includes a plurality of light emitting diodes (LEDs) (12, 14), a plurality of optical lenses (20, 40, 60, 80) for diverging and collimating light generated by the plurality of LEDs (12, 14), wherein the plurality of LEDs (12, 14) and the plurality of optical lenses (20, 40, 60, 80) are sequentially arranged in an axial direction, and wherein the plurality of optical lenses (20, 40, 60, 80) are configured such that by altering an axial position of one of the optical lenses (20, 40, 60, 80) from a first defined axial position to a second defined axial position, a final angular light distribution of the optical system (100) is variable.
Claims18
An optical system for a light emitting diode (LED) signal comprising:
- a plurality of light emitting diodes (LEDs),
- a plurality of optical lenses for diverging and collimating light generated by the plurality of LEDs, wherein the plurality of optical lenses comprises a first lens, a second lens, a third lens and a fourth lens,
- wherein the plurality of LEDs and the plurality of optical lenses are sequentially arranged in an axial direction, and
- wherein the plurality of optical lenses are configured such that by altering an axial position of one of the optical lenses from a first defined axial position to a second defined axial position, a final angular light distribution of the optical system is variable,
- wherein the fourth lens collimates the light and provides the final angular light distribution,
- wherein the fourth lens comprises an array of multiple identical convex lenslets, each lenslet comprising a curved surface oriented towards the plurality of LEDs and a flat surface oriented towards an output of the fourth lens.
A wayside LED signal comprising:
- a plurality of light emitting diodes (LEDs);
- a plurality of optical lenses for diverging and collimating light generated by the plurality of LEDs, wherein the plurality of optical lenses comprises a first lens, a second lens, a third lens and a fourth lens,
- wherein the plurality of LEDs and the plurality of optical lenses are sequentially arranged in an axial direction, and
- wherein the plurality of optical lenses are configured such that by altering an axial position of one of the optical lenses from a first defined axial position to a second defined axial position, a final angular light distribution of the optical system is variable,
- wherein the fourth lens collimates the light and provides the final angular light distribution,
- wherein the fourth lens comprises an array of multiple identical convex lenslets, each lenslet comprising a curved surface oriented towards the plurality of LEDs and a flat surface oriented towards an output of the fourth lens.
Dependencies are inferred from the claim text.