Abstract: A range extinction simulator system that simulates an outdoor laser test range in a relatively small area, which provides for a computer controlled, electronic laser range simulator used to test laser rangefinders. The system evaluates a laser rangefinder's output energy and programs a laser transmitter to fire into the rangefinder at a specific optical power level needed to simulate a return signal from a target for a given range, atmospheric attenuation, and target reflectivity. This invention allows laser rangefinders to be tested without the necessity of a long distance (typically outdoor) laser range. The system provides for a significant cost savings over current test systems and improves the ability to perform varied tests on laser rangefinders.