Patent ID: 8619266

Claim:
An optical position-measuring device, comprising: a light source adapted to emit a beam of rays; a measuring reflector movable in space; a reference reflector; a detection unit; a light-beam deflection unit adapted to align at least one beam of rays, emitted by the light source, in a direction of the measuring reflector, the light-beam deflection unit including a cardan system having a first cardan frame and a second cardan frame, the first cardan frame being motor-adjustable about a first axis of rotation, and the second cardan frame within the first cardan frame being motor-adjustable about a second axis of rotation oriented in a direction perpendicular to the first axis of rotation, the first axis of rotation and the second axis of rotation intersecting at a fixed reference point at which the reference reflector is located; and a plurality of mirrors arranged rigidly on the cardan frames, so that during alignment with the measuring reflector, the beam of rays is pivotable about the fixed reference point by the plurality of mirrors.