Laser rangefinder built-in-test equipment /LRF-BITE/

The prime system parameters of interest in the testing of laser rangefinders are receiver sensitivity, transmitter energy, internal and external boresight, and range accuracy. These cannot be measured by a purely electronic built-in-test, but an outdoor range can be simulated by a collimator and an optical delay line. By accurate control of optical geometry, delay, and attenuation, successful ranging through the test device assures that the rangefinder is serviceable. This paper describes a test device (SORT BITE) that occupies less than 10 cubic inches of volume and can be incorporated in new designs or added to existing rangefinders.