Abstract: A dual fluorescent wheel with two disk-shaped carrier elements which are interconnected by wing-type cooling ribs is disclosed. When the dual fluorescent wheel rotates, air flows in through an axial opening in one of the carrier elements, the air flows radially through the interspace between the carrier elements or the wing-type cooling ribs and flows out at the edge. This airflow improves the dissipation of heat which is produced when an excitation laser irradiates the annular fluorescent strips located on the two exterior faces.

Abstract: A solar simulator with at least one lamp module, where the luminous module contains multiple light generating units is disclosed. Each of the light generating units contain at least one semiconductor light source, which generate light in a plurality of separately controllable wavelength ranges. Disposed downstream from the light generating units is a light-concentrating primary optical unit. A light-homogenizing secondary optical unit is likewise disposed downstream of the light generating units. And an imaging tertiary optical unit is disposed downstream of the secondary optical unit. A method for operating the solar simulator and the light generating units in such a way that the solar simulator generates light radiation that alters over time is also disclosed.

Abstract: A phosphor device (1) comprising a carrier member (2) having upper and lower faces; a phosphor layer (3) being arranged at the upper face of the carrier member (2), wherein the phosphor layer (3) comprises at least two tiled phosphor zones (R, G, B); an optical transmitting member (4) having a first end face (7) and a second end face (9), the optical transmitting member (4) being arranged at the top portion of the phosphor layer (3), whereby the first end face (7) of the optical transmitting member (4) covers at least a subarea (8) of each of the at least two phosphor zones (R, G, B).

Abstract: The invention concerns a light source unit of tunable spectral properties, having a pump light source and a phosphor element for a conversion of pump light into converted light intended for illuminating a target, wherein the phosphor element has at least two phosphor element sections interacting differently with pump light, and wherein the light source unit further comprises a deflecting unit, such as a zoom lens or a variable diffraction grating, for deflecting the pump light so as to vary a distribution of pump light incident onto the phosphor element with respect to the different phosphor element sections, in order to vary spectral properties of the combined converted light beam emanating from the light source unit.

Abstract: A projection device (1; 24), comprising a base (2), a support (3) and a projection head (4; 27), the support (3) being rotatable relative to the base (2) and relative to the projection head (4; 27) wherein a light guide system (10-18) is accommodated in the support, (3) and at least one wavelength-converting luminophore (22) for converting at least part of a light beam (L) generated by the at least one light source (5) is accommodated in the projection head (4; 27).

Abstract: The invention relates to a lighting device to be installed in and/or behind a panel (3), in particular ceiling and/or wall cladding, comprising at least one fitted lamp (1, 1a, 1b) having at least one housing (4) which ends approximately flush with the panel (3), at least one light exit surface (10) and at least one LED module (10), the LED module (5) comprising at least one light-emitting diode (LED) (6). At least one ventilation opening (11, 12) is arranged between the light exit surface (10) and the housing (4) and means (13) are provided for generating an air flow through the ventilation opening (11, 12).

Abstract: A light source unit comprising: a pump light source (1) for an emission of pump light (2), a phosphor element (3) for a conversion of said pump light (2) into converted light (4), an optical system (6) for transmitting at least a part of said converted light (4) for further use, wherein at least a part of said pump light (2) is coupled into said optical system (6) and transmitted by said optical system (6) to said phosphor element (3) for said conversion.

Abstract: A light source unit may include a cooling device; a luminescent substance; an excitation radiation source having a laser source; and an optical element arranged between the radiation source and the substance; wherein the cooling device constitutes a heat sink, wherein the substance is linked thermally to the heat sink; and wherein the optical element is designed as an integrating optical element and is coupled between the radiation source and the substance in such a mariner that a part of the radiation emitted by the radiation source, entering in an acceptance angle range of the integrating optical element, is subjected to an internal reflection in the optical element before it exits the optical element and strikes the substance, and that a part of the radiation emitted by the substance enters the optical element and exits the optical element as effective radiation.

Abstract: In various embodiments, a method for determining calibration data for a light source is provided. The method may include determining at least one of a photometric quantity and a colorimetric quantity of the light source; determining a color stimulus specification using at least one of the photometric quantity and the colorimetric quantity; and determining the calibration data as a function of the color stimulus specification and a temperature of the light source.

Abstract: A method for setting a color locus of at least one luminous source is provided. The method may include determining a temperature, and setting the color locus of the at least one luminous source depending on the temperature determined.

Abstract: A method for setting a color location is provided. The method may include providing n luminous sources of which n-3 luminous sources have been, or are preset; determining a color location difference of the n luminous sources from a desired color location; and setting the 3 luminous sources not preset are set such that the desired color location is achieved.

Abstract: The invention relates to a lighting device to be installed in and/or behind a panel (3), in particular ceiling and/or wall cladding, comprising at least one fitted lamp (1, 1a, 1b) having at least one housing (4) which ends approximately flush with the panel (3), at least one light exit surface (10) and at least one LED module (10), the LED module (5) comprising at least one light-emitting diode (LED) (6). At least one ventilation opening (11, 12) is arranged between the light exit surface (10) and the housing (4) and means (13) are provided for generating an air flow through the ventilation opening (11, 12).