A Laser Radar Ranging System Using Pseudo-Random-Code Modulation

A laser radar ranging system intended for a variety of experience in an advanzed electrical engineering undergraduate projects laboratory is described. Pseudo-random coding is applied to the laser beam via a KDP crystal modulator, by means of digitalmodule circuitry and silicon-controlled rectifier circuitry. The equipment lends itself to a number of studies in pulse and digital circuitry, statistical communication theory, and electro-optical engineering. Mention is made of other uses of the laser, which is of the low-power CW helium-neon type.