Patent ID: 9366874
Filing Date: 2016-06-14
CPC Classification: G01J,G02B

Claim Text:
1. Beam combining device comprising a plurality of separate input beam paths and at least one output beam path for combining a plurality of input beams to form at least one output beam, wherein one or a plurality of Risley prism pairs are assigned to each input beam path, each Risley prism pair deflecting the input beam in an adjustable direction, wherein a beam position measuring system, preferably in conjunction with a position-sensitive detector or a camera, is arranged in the output beam path, wherein a power measuring system is arranged in the output beam path and measures the light power of the output beam, wherein each Risley prism pair comprises two prisms arranged one behind the other in the course of the light beam, with at least a first prism of the two prisms being mounted rotatably about a rotation axis, wherein said beam combining device further comprises an electric motor drive actuating a rotary movement of at least the first prism of the two prisms, wherein the electric motor drive is a piezoelectric vibration drive comprising a mechanical resonator and a piezoelectric element coupled thereto, wherein the mechanical resonator bears against a friction wheel connected to the first prism for conjoint rotation, and wherein the orientation of each Risley prism pair is controllable depending on the beam superimposition measured by the beam position measuring system or depending on the light power measured by the power measuring system.