公开(公告)号：US20200249330A1

公开(公告)日：2020-08-06

申请号：US16674743

申请日：2019-11-05

申请人： FARO Technologies, Inc.

发明人： Robert E. Bridges ,  John M. Mountney

IPC分类号： G01S7/497

摘要： An apparatus and method for calibrating a distance meter using a double-pass configuration based on reflection off an intermediate retroreflector. The system includes a first distance meter operable to send a first beam light in a first path that intercepts a first retroreflector and a second retroreflector, to receive the first beam of light after reflection from the first retroreflector and the second retroreflector, and to measure a first distance traveled by the first beam of light, the first retroreflector being located at a first position. The system further includes a second distance meter operable to send a second beam of light in a second path that intercepts the first retroreflector, to receive the second beam of light after reflection from the first retroreflector, and to measure a second distance traveled by the second beam of light.