Laser tracker with interferometer and absolute distance measuring unit and calibration method for a laser tracker

摘要

The sample measurements of different distances are performed with respect to objective (97). The determination of interferometer output for different distances to objective is performed under stable halts of interferometer wavelength. The measuring distance values for different distances to objective are measured by absolute distance measurement unit. The interferometer wavelength of measuring radiation (96) is determined by control and evaluation unit based on determined measuring distance values and interferometer outputs. Independent claims are included for the following: (1) calibration method of laser tracker; and (2) computer program product for calibrating laser tracker.