Diploma thesis includes development of fast contactless distance measurement. We are focusing on laser technology with time of flight principle. Transmitter is realized with high power pulsed laser diode. Reflected light is received with avalanche photodiode which provides sensitivity on very low light level. High performance integrated circuit for time to digital conversion (TDC) allows measurement of time in several tens of picoseconds and thus resolution of measurement device of approximately 1 cm. Microcontroller connects each part of measurement device, starts the measurement, forwards the result through communication port and temperature compensates bias voltage of avalanche photodiode. Prototype of distance measurement device is built and results are evaluated according to expected specifications.
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