Scanning device with point-to-point focusing

An opto-electronic measuring device for point cloud acquisition by scanning measuring of an object's surface with a measuring rate of at least one thousand object points per second, in particular laser scanner or laser tracker, comprising:

• a base and a targeting unit defining a target axis for targeting the object to be measured, the targeting unit being rotatable in relation to the base,
• a light source for generation of a measurement beam, an exit aperture for emitting the measurement beam as a free beam in direction of the target axis towards a point on the object's surface to be measured and with an internal emitting measurement beam path,
• wherein a high-speed autofocus optical module, situated in the internal emitting measurement beam path, the high-speed autofocus optical module being designed for a real-time measurement focus adaption within a single object point measurement period and comprising at least one variable focal length lens or reconfigurable optical phase plate having a response time of under 1 ms, in particular of under lOus.