US 12,436,379 B2
Scanning device with point-to-point focusing
Jürg Hinderling, Marbach (CH); Andreas Walser, St. Gallen (CH); Tim Mayer, Widnau (CH); Hannes Beyer, Romanshorn (CH); and Oliver Rohrer, Lindau (DE)
Assigned to HEXAGON TECHNOLOGY CENTER GMBH, Heerbrugg (CH)
Filed by HEXAGON TECHNOLOGY CENTER GMBH, Heerbrugg (CH)
Filed on Dec. 9, 2021, as Appl. No. 17/546,910.
Claims priority of application No. 20213118 (EP), filed on Dec. 10, 2020.
Prior Publication US 2022/0187592 A1, Jun. 16, 2022
Int. Cl. G02B 26/08 (2006.01); G01B 11/30 (2006.01); G01S 17/89 (2020.01); G02B 26/10 (2006.01); G02B 27/30 (2006.01)
CPC G02B 26/0875 (2013.01) [G01B 11/30 (2013.01); G01S 17/89 (2013.01); G02B 26/10 (2013.01); G02B 27/30 (2013.01)] 23 Claims
OG exemplary drawing
 
1. 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 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 10 μs.