Patent ID: 7224444

Claim:
A method for optical distance measurement, in which at least one transmission unit of a transmission branch ( 14 ) of a measuring device ( 10 ) transmits modulated measurement beam ( 16 , 36 ) in the direction of a target object ( 20 ), and the measurement beam ( 17 , 44 ) returning from the target object ( 20 ) is detected in the measuring device ( 10 ) by at least one measuring diode ( 62 ), present in a reception branch ( 18 ) of the device ( 10 ), and delivered to a control and evaluation unit ( 58 ) of the measuring device, and the at least one measuring diode ( 62 ) of the reception branch ( 18 ) is also used as a frequency-mixing component for transformation of a measurement signal to be evaluated, characterized in that besides the cathode voltage U K (U K =U 0 +u K (t)) of the measuring diode ( 62 ), an anode voltage U A of the measuring diode ( 62 ) is also modulated (U A =u A (t)).