Patent ID: 7645982

Claim:
A system for calibrating laser designator and rangefinder test sets comprising: a) a high speed detector module ( 11 ) which receives a laser input signal, and outputs a laser output signal ( 11 a ) and an electrical pulse shaped output ( 11 b ); b) a variable attenuator module ( 15 ) which receives said laser output signal ( 11 a ), said variable attenuator module including: i) a rotating waveplate ( 31 ) which rotates a polarization of the received laser output signal ( 11 a ), and ii) a Glan laser polarizing beam splitter ( 35 ) which receives the rotated laser output signal ( 11 a ), said polarizing beam splitter passing only vertically polarized portions ( 15 a ) of said rotated laser output signal; c) an energy detector module ( 17 ) receiving said vertically polarized portions of said rotated laser output signal and including: a beam splitter ( 41 ) which splits said vertically polarized portions of said rotated laser output signal into a first path pulse ( 17 c ) and a second path pulse ( 17 b ), said second path pulse used to calibrate a laser designator/rangefinder test set.