This thesis presents a laser range finder system using a pulsed diode laser with IR wavelength band to measure the time-of-flight.
We suggest a constant fraction discriminator(CFD) to minimize the effect of the reflected light pulse on the range measurement. In order to realize a CFD, a peak-hold method which has a peak level of the reflected pulse is introduced.
We also suggest a time to amplitude converter(TAC) which produces a voltage level proportional to the start-stop time interval using constant current charging method.
As a result, we present a 1-dimensional range finder system which has a measuring range up to 50m, good linearity independent to the measuring distances and the robustness with respect to the characteristics of target surfaces.
In real experiments, the proposed range finder achieves the absolute accuracy of +/- 30cm up to 50m.
