Phase shift laser range finder using precision integrator

Laser Range Finders have wide battle field applications. Conventional Laser Range Finders are based upon TOF technique or complex phase detection based techniques. In this work a simple range finding technique is proposed for the precision measurement of range for typical battlefield range finding applications. A simple analog integrator is used to measure the phase between transmitted and received pulses precisely. A Silicon Labs 8051 family microcontroller has been used for implementing the algorithm. It is observed that accuracy of range finder can be improved to 750 times.