Lighting device
View Patent ↗A lighting device may include a laser light source arrangement; an optical unit; at least one pivotable mirror; and at least one light wavelength conversion element. The optical unit and the at least one pivotable mirror are embodied in such a way that laser light generated by the laser light source arrangement is directed via the optical unit and the at least one pivotable mirror to the light wavelength conversion element. The lighting device may further include a unit configured to compensate for a lengthening or shortening—caused by the pivoting movement of the at least one pivotable mirror—of the optical path of the laser light generated by the laser light source arrangement and directed onto the at least one light wavelength conversion element via the optical unit and the at least one pivotable mirror.
1. A lighting device, comprising:
a laser light source arrangement;
an optical unit;
at least one pivotable mirror; and
at least one light wavelength conversion element;
wherein the optical unit and the at least one pivotable mirror are embodied in such a way that laser light generated by the laser light source arrangement is directed via the optical unit and the at least one pivotable mirror to the light wavelength conversion element; and
a unit configured to compensate for a lengthening or shortening—caused by the pivoting movement of the at least one pivotable mirror—of the optical path of the laser light generated by the laser light source arrangement and directed onto the at least one light wavelength conversion element via the optical unit and the at least one pivotable mirror.
2. The lighting device of claim 1 ,
wherein the unit configured to compensate for a lengthening or shortening comprises an apparatus configured to vary the distance between the optical unit and the at least one pivotable mirror in a manner dependent on the pivoting position of the at least one pivotable mirror.
3. The lighting device of claim 1 ,
wherein the unit configured to compensate for a lengthening or shortening comprises an apparatus configured to vary the distance between the laser light source arrangement and the at least one pivotable mirror in a manner dependent on the pivoting position of the at least one pivotable mirror.
4. The lighting device of claim 1 ,
wherein the unit configured to compensate for a lengthening or shortening comprises an apparatus configured to vary the optical properties of the optical unit in a manner dependent on the pivoting position of the at least one pivotable mirror.
5. The lighting device of claim 1 ,
wherein the unit configured to compensate for a lengthening or shortening comprises an apparatus configured to vary the distance between the at least one pivotable mirror and the at least one light wavelength conversion element in a manner dependent on the pivoting position of the at least one pivotable mirror.
6. The lighting device of claim 1 , further comprising:
a controller configured to regulate the distance between the optical unit and the at least one pivotable mirror synchronously with the pivoting movement of the mirror.
7. The lighting device of claim 1 , further comprising:
a controller configured to regulate the focal length of the optical unit synchronously with the pivoting movement of the at least one pivotable mirror.
8. The lighting device of claim 1 , further comprising:
a controller configured to regulate the distance between the at least one pivotable mirror and the at least one light wavelength conversion element synchronously with the pivoting movement of the at least one pivotable mirror.
9. The lighting device of claim 1 ,
wherein the at least one pivotable mirror is embodied as a Micro Electro Mechanical Systems mirror (MEMS mirror).
10. The lighting device of claim 1 ,
wherein the laser light source arrangement is configured to generate light having wavelengths from the wavelength range of 380 nanometers to 490 nanometers, and the at least one light wavelength conversion element is embodied in such a way that it converts light having wavelengths from the wavelength range of 380 nanometers to 490 nanometers proportionally into light having an intensity maximum in the wavelength range of 520 nanometers to 590 nanometers.