Optoelectronic distance measurement in construction and plant engineering industry, involves modulating optical intensities of main and reference emitters, and determining phase of resultant signals simultaneously

摘要

Optical intensities of main emitter (1) and reference emitter (2) are modulated simultaneously at different frequencies (f1,f2). The resultant frequencies are converted to intermediate frequency (IF) components (fzF1,fzF2). The separation of the phase information between the IF component is determined based on modulated difference frequencies (f1-f2) and IF difference frequencies (f(zF1)-f(zF2)). An independent claim is also included for optoelectronic distance measurement device.