METHOD FOR OPERATING A GEODETIC INSTRUMENT, AND RELATED GEODETIC INSTRUMENT

The present inventive concept relates to a method for operating a geodetic instrument comprising an optical source for assisting a user in aiming at a target in a scene by emitting optical pulses forming a spot at the target, and an imaging device, wherein the imaging device and the optical source share a common optical channel within the geodetic instrument, the method comprising: capturing a first image of a scene with the optical source turned on; obtaining a reference image from at least the first image, wherein contribution from the scene is suppressed, the reference image representing crosstalk occurring in the common optical channel; capturing a second image with the optical source turned on; and processing the second image with the reference image for removing crosstalk from the second image.