A device for detecting a light beam projecting from a lamp of a vehicle is described, and includes a plurality of photo-sensors and a plurality of indicator bulbs. The photo-sensors are arranged in a linear array along a first axis, and the indicator bulbs are arranged in a linear array along a second axis that is in parallel to the first axis. A controller is in communication with the photo-sensors and the indicator bulbs. The controller includes an instruction set that is executable to monitor signal inputs from the plurality of photo-sensors to detect presence of a light beam projecting from the lamp of a vehicle, determine a cut-off gradient line for the light beam based thereon, and illuminate one of the indicator bulbs to indicate a location of the cut-off gradient line for the light beam.

A method of illumination includes energizing a light source of a lighting apparatus to emit a plurality of light rays. The method also includes directing a first light ray of the plurality of light rays into a first upper passageway. The method also includes directing a second light ray of the plurality of light rays into a first lower passageway. The method also includes redirecting the first light ray from the first upper passageway into a second upper passageway. The method also includes redirecting the second light ray from the second upper passageway into a second lower passageway.

A method of illumination includes energizing a light source of a lighting apparatus to emit a plurality of light rays. The method also includes directing a first light ray of the plurality of light rays into a first upper passageway. The method also includes directing a second light ray of the plurality of light rays into a first lower passageway. The method also includes redirecting the first light ray from the first upper passageway into a second upper passageway. The method also includes redirecting the second light ray from the second upper passageway into a second lower passageway.

The invention relates to a method for testing the operability of a motor vehicle (10) with a headlamp (12) which comprises a laser (14) for generating by means of which a converter (16) for emitting converted light is excited, which is emitted by the headlamp (12) for generating a predeterminable light distribution (18) on a surface area (20) in a surrounding area of the motor vehicle (10), wherein the predeterminable light distribution (18) is set by a control device (22) of the headlamp (12). The object of the invention is to check the condition of the converter (16). A test pattern (26, 30) is set by the control device (22) as light distribution (18). The test pattern (26, 30) is detected on the surface area (20) by means of an optical detection device (24) of the motor vehicle (10). The detected test pattern (26, 30) is compared with at a predetermined reference pattern by an evaluation device (28) of the motor vehicle (10). The invention also relates to a motor vehicle (10), which is designed to carry out such a method.

The invention relates to a method for testing the operability of a motor vehicle (10) with a headlamp (12) which comprises a laser (14) for generating by means of which a converter (16) for emitting converted light is excited, which is emitted by the headlamp (12) for generating a predeterminable light distribution (18) on a surface area (20) in a surrounding area of the motor vehicle (10), wherein the predeterminable light distribution (18) is set by a control device (22) of the headlamp (12). The object of the invention is to check the condition of the converter (16). A test pattern (26, 30) is set by the control device (22) as light distribution (18). The test pattern (26, 30) is detected on the surface area (20) by means of an optical detection device (24) of the motor vehicle (10). The detected test pattern (26, 30) is compared with at a predetermined reference pattern by an evaluation device (28) of the motor vehicle (10). The invention also relates to a motor vehicle (10), which is designed to carry out such a method.

A vehicle headlamp device includes headlamps, which are structured so as to be able to project or irradiate given patterns and given shapes without distortion on a given virtual surface in front of a vehicle from a left headlight and a right headlight, respectively, a camera that captures an image of the area in front of the vehicle, and a state detecting portion configured to detect distortion of the given patterns, which are projected or irradiated on an irradiated surface in front of the vehicle, relative to the given patterns projected or irradiated on the given virtual surface in front of the vehicle, based on the captured image, and also detect a state of the irradiated surface based on the distortion, and a correcting portion configured to correct a relative optical axis deviation between the left headlight and the right headlight.

A method is described for determining angle errors when measuring slewing angles of a pivoted light-deflecting device, including the following steps: emitting a first light beam and a second light beam, which enclose a light beam angle, onto the light-deflecting device; receiving the first light beam and second light beam deflected by the light-deflecting device and reflected by an object; calculating a first propagation path of the first light beam and a second propagation path of the second light beam; pivoting the light-deflecting device from an initial position to a final position, respective slewing angles of the light-deflecting device being measured in the process and a dependency of the first propagation path on the measured slewing angles being determined; and calculating an angle error for a measured slewing angle to be corrected from the set of measured slewing angles by using the light beam angle, the second propagation path and the dependency of the first propagation path on the measured slewing angle.

The present disclosure discusses a lighting apparatus. The lighting apparatus includes a housing with a fastening fixture and a pivot fixture, a light bar including a first arm, a second arm and a third arm with an optical marking, and a light guide including a light pipe, a pivot hole, a first slot and a second slot located between the housing and the light bar, wherein the optical marking of the light bar is aligned with the light pipe of the light guide by rotating the light guide and the first arm about the pivot hole and the light bar is fastened to the housing.

A system may have lights. The lights may be moved using a positioner. Control circuitry may use sensor circuitry to monitor the environment surrounding the system. The sensor circuitry may include one or more sensors to measure the shape of a surface in front of the system and the location of the surface relative to the system. The sensor circuitry may also measure light illumination on the surface. Based on the known shape of the surface in front of the system and the distance of the surface from the system, the control circuitry can predict where a light should be aimed on the surface. By comparing predictions of light illumination on the surface to measurements of light illumination on the surface, the system can determine how to move the light with the positioner to align the light.

A headlight optical axis control apparatus calculates an inclination angle of a vehicle with respect to a road surface from a ratio of a difference between acceleration signals in the front-and-rear direction measured at two time points (kn, kn+1) to a difference between acceleration signals in the up-and-down direction measured at the two time points (kn, kn+1), the two time points being in the vicinity of a time when the attitude of a vehicle body becomes equivalent to a stationary state, in a period from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.