Patent ID: 7023531
Filing Date: 2006-04-04
Classification: G01S

Abstract:
1. A laser distance measuring device, comprising a laser diode ( 4 ) for emitting a high frequency, intensity modulated measurement light beam ( 3 ); a signal generation unit (SEE) for generating a high frequency signal, the laser diode ( 4 ) being connected with the signal generation unit (SEE) for high frequency signal transmission; at least one receiver photodiode ( 8 a ) for receiving the measurement light signal ( 3 ) reflected from a measurable object ( 5 ); a high frequency demodulator ( 13 ), the receiver photodiode ( 8 a ) being connected with the high frequency demodulator ( 13 ) for generating a low frequency phase-delay signal (S 1 ) for obtaining a phase information of the reflected, intensity-modulated, measurement light beam ( 3 ); and a microcontroller (μC) being connected with a control photodetector ( 8 c ), which is arranged in a path of the measurement light beam ( 3 ), for providing a low frequency signal transmission, whereby an error signal transmission is effected by an unmixed control signal connected between said control photodetector and said microcontroller, and contains an error information minimized by error regulation of the modulation.