A light signal, in particular for rail-bound traffic routes, includes a control device which controls a light source, and an optical system for visualizing a signal term. In order to more precisely adjust brightness boundaries, light distribution and phantom light intensity, a transmission-controllable smart-glass element is provided in an aperture segment of the light flow.

A light emitting diode (LED) shielding and monitoring system includes multiple light emitting diodes (LEDs) (12, 14, 82, 92), multiple optical detectors (20, 84, 94) for detecting a light output of the plurality of LEDs (12, 14, 82, 92), and a LED shield (30, 110) with multiple compartments (38, 114) for receiving the multiple optical detectors (20, 84, 94). The LED shield (30, 110) is configured such that each compartment (38, 114) receives an optical detector (20, 84, 94), and wherein each compartment (38, 114) is configured such that the optical detector (20, 84, 94) within the compartment (38, 114) detects the light output of a LED (12, 14, 82, 92) of the multiple LEDs (12, 14, 82, 92) without detecting light output other than the light output of the LED (12, 14, 82, 92). Further, wayside LED signals including a LED shielding and monitoring system are provided.

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.

A signal light assembly is provided that comprises a multi-position Fresnel lens having a circumference, a first side and a second side. The signal light assembly further comprises a main housing configured to attach to the multi-position Fresnel lens. The multi-position Fresnel lens includes a first plurality of pads and a second plurality of pads on the first side of the multi-position Fresnel lens such that the first plurality of pads and the second plurality of pads are different and alternatively disposed. The first plurality of pads corresponds to a first range operation related to a first focal length. The second plurality of pads corresponds to a second range operation related to a second focal length. The multi-position Fresnel lens is disposed in a first position corresponding to the first range operation or in a second position corresponding to the second range operation based on the use of either the first plurality of pads or the second plurality of pads for assembly between the main housing and the multi-position Fresnel lens.

A signal light assembly is provided that comprises a multi-position Fresnel lens having a circumference, a first side and a second side. The signal light assembly further comprises a main housing configured to attach to the multi-position Fresnel lens. The multi-position Fresnel lens includes a first plurality of pads and a second plurality of pads on the first side of the multi-position Fresnel lens such that the first plurality of pads and the second plurality of pads are different and alternatively disposed. The first plurality of pads corresponds to a first range operation related to a first focal length. The second plurality of pads corresponds to a second range operation related to a second focal length. The multi-position Fresnel lens is disposed in a first position corresponding to the first range operation or in a second position corresponding to the second range operation based on the use of either the first plurality of pads or the second plurality of pads for assembly between the main housing and the multi-position Fresnel lens.

A light signal, in particular for rail-bound traffic routes, includes a control device which controls a light source, and an optical system for visualizing a signal term. In order to more precisely adjust brightness boundaries, light distribution and phantom light intensity, a transmission-controllable smart-glass element is provided in an aperture segment of the light flow.

A light emitting diode (LED) shielding and monitoring system includes multiple light emitting diodes (LEDs) (12, 14, 82, 92), multiple optical detectors (20, 84, 94) for detecting a light output of the plurality of LEDs (12, 14, 82, 92), and a LED shield (30, 110) with multiple compartments (38, 114) for receiving the multiple optical detectors (20, 84, 94). The LED shield (30, 110) is configured such that each compartment (38, 114) receives an optical detector (20, 84, 94), and wherein each compartment (38, 114) is configured such that the optical detector (20, 84, 94) within the compartment (38, 114) detects the light output of a LED (12, 14, 82, 92) of the multiple LEDs (12, 14, 82, 92) without detecting light output other than the light output of the LED (12, 14, 82, 92). Further, wayside LED signals including a LED shielding and monitoring system are provided.

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.

A light signal, in particular for rail-bound traffic routes, includes a light source, an optical system and a control device for adjusting an emission characteristic. In order to improve the way optical parameters, in particular regarding brightness, phantom light and path geometry can be adjusted, the control device is configured to adjust the transmission properties of at least one smart glass element disposed in the luminous or light flux.

An apparatus including a housing; a solid state light source disposed in the housing to emit light therefrom; and a filter disposed in or on the housing in optical communication with the solid state light source to reshape a radiometric spectrum of the light emitted by the solid state light source to substantially replicate a radiometric spectrum of an incandescent filament light source.