In various embodiments, a lighting device is provided. The lighting device includes at least one light source for emitting primary light, at least one phosphor body which is illuminatable by the primary light and is spaced apart from the at least one light source, and at least one light scattering body which is situated optically downstream of the phosphor body in a light propagation direction of the primary light that is uninfluenced by the phosphor body. The lighting device is designed in the case of an intact phosphor body to generate an illumination pattern by light generated by the phosphor body, and otherwise to generate a light emission pattern by light generated by the at least one light scattering body. The light emission pattern differs from the illumination pattern.

An illumination device includes a laser element, a fluorescent material, a light projection lens, a laser light reflector, a detection element, and a control unit connected to the detection element. The fluorescent material is disposed in a direction of propagation of laser light from the laser element, and converts the laser light into illumination light. The light projection lens and the laser light reflector are disposed in a direction of propagation of the illumination light from the fluorescent material. The detection element can detect the laser light reflected on the laser light reflector and external light. The control unit calculates a comparison value by comparing the amount detected by the detection element when the laser element is emitting the laser light and the amount detected by the detection element when the laser element is not emitting the laser light. When this comparison value becomes larger than the first threshold, the control unit stops or attenuates the laser light from the laser element.

A lighting apparatus for a vehicle includes a main lens; a light source device configured to emit light; and a first reflecting unit provided in a partial area of a front surface of the main lens. The lighting apparatus also includes a scanning module configured to reflect the light emitted from the light source device to the first reflecting unit in a predetermined scanning pattern. The lighting apparatus further includes a reflective fluorescent body configured to convert a wavelength of light reflected by the first reflecting unit and to reflect the light having the converted wavelength into the main lens. The scanning module includes: a scanning unit configured to be driven according to a predetermined frequency and to reflect an incident light in the predetermined scanning pattern, and a first light condensing device configured to condense the light emitted from the light source device into the scanning unit.

A vehicular lighting device from which a fluorescent material is omitted that may cause deterioration of color rendering properties and occurrence of color separation is provided. The vehicular lighting device can have higher in color rendering properties than a conventional white light source obtained by combining a semiconductor light-emitting element such as an LD and the fluorescent material (wavelength converting member) and can suppress occurrence of color separation. A vehicular lighting device of the presently disclosed subject matter includes a supercontinuum light source that outputs supercontinuum light containing a visible wavelength region, and an optical system that controls the supercontinuum light output by the supercontinuum light source.

A lighting device includes a laser light source configured to emit a laser beam, a wavelength conversion member including a laser beam irradiation region to which the laser beam is radiated and configured to emit a wavelength converted light excited by radiation of the laser beam, a laser beam scanning mechanism configured to form a light distribution pattern according to a scanning range of the laser beam by scanning the laser beam radiated to the laser beam irradiation region, and a projection lens configured to project illumination light that forms a light distribution pattern forward, and an incidence angle of the laser beam, which is scanned by the laser beam scanning mechanism, with respect to the wavelength conversion member is set to an angle where the laser beam does not directly enter the projection lens when the wavelength conversion member is damaged, chipped or fallen off.

For measuring the oscillation amplitude of a scanner mirror in a projection system of a motor vehicle headlight, a laser beam generated by a laser source is directed onto the scanner mirror and reflected by the latter so that the laser beam thus reflected is incident on a detector device (20) that has a plurality of photodetector elements (Q1, Q2, Q3, Q4) and there describes a curve (P) based on the oscillation movement of the scanner mirror. The center point of the curve (P) is offset by an offset value (x.sub.offset, y.sub.offset) from the center of the detector device (20). The time period (t.sub.ON,X, t.sub.ON,Y) in which the curve passes through the specific detector region (R.sub.X, R.sub.Y) that corresponds to a coordinate to be measured is determined; and the oscillation amplitude (x.sub.pp, y.sub.pp) in the direction of the specific coordinate is determined using the ratio of the time period (t.sub.ON,X, t.sub.ON,Y) determined in this manner to the total duration (T) of an oscillation period and the offsets (x.sub.offset, y.sub.offset).

A lighting device for a vehicle is provided. The lighting device includes a light source with which at least one of useful light or assist light can be emitted into the surroundings, a sensor with which at least one of useful light or assist light reflected by the surroundings can be at least partially detected, and an electronic unit for evaluating at least one of the useful light or assist light sensed by the sensor.

A light source assembly with default safety function includes a laser source, an optical splitter, a fluorescent layer, an optical-electrical converter, and a voltage controller. The optical splitter has first solid portion, a second solid portion, and an optical transition. The fluorescent layer can absorb a laser and convert it into visible light. The optical-electrical converter receives a portion of the visible light and converts it into an electrical signal. The voltage controller applies a voltage to the optical splitter when no electrical signal converted from visible light is received. Refractive indexes of the first and second solid portions are equal when no voltage is applied to the optical splitter but refractive index of the first solid portion increases when voltage is applied to the optical splitter, thereby causing total reflection of the laser beam.

Various embodiments may relate to a lighting device, including at least one primary light source for generating primary light, a phosphor volume spaced apart from the at least one primary light source and serving for at least partly converting the primary light into secondary light having a different wavelength, at least one light sensor for detecting light generated by the at least one primary light source, and an evaluation unit for determining a case of damage of the phosphor volume on the basis of sensor data of at least one light sensor. The lighting device includes at least one additional light source for irradiating the phosphor volume, and is designed to operate the at least one additional light source, the at least one light sensor and the evaluation unit with the primary light source switched off

A first photosensor is sensitive to the wavelength of excitation light, insensitive to the wavelength of fluorescent light, and receives a portion of the output light to generate a first current corresponding to the amount of light received. A second photosensor is sensitive to the fluorescent light wavelength, insensitive to excitation light wavelength, and receives a portion of the output light to generate a second current corresponding to the received light amount. A first current/voltage conversion circuit outputs a first detection voltage corresponding to the voltage drop across a first resistor. A second current/voltage conversion circuit outputs a second detection voltage corresponding to the voltage drop across a second resistor. If (i) a relation between the magnitudes of the first detection voltage and the second detection voltage has reversed, or (ii) if the first detection voltage deviates from a normal voltage range, a judgment unit asserts an abnormality detection signal.