Threshold Detector

DRDO has developed a threshold detector unit essential for the evaluation of EOCM-class of laser systems in the field conditions over long ranges. It is not available commercially in the format desired for such a diagnostic application where it is not the energy/power but the energy/power density at the target plane that is of relevance vis-a-vis EOCM laser system efficacy against various electro-optic and optoelectronic sensors.

The gadget has selectable energy density threshold level and gives an audio/visual indication when the energy density actually available at the target plane is above the set value. It can be used with both free running as well as Q-switched lasers. The gadget can handle free running lasers with pulse width in the range of 100 -s to 600 -s and Q-switched DRDO has developed a threshold detector unit essential for the evaluation of EOCM-class of laser systems in the field conditions over long ranges. It is not available commercially in the format desired for such a diagnostic application where it is not the energy/power but the energy/power density at the target plane that is of relevance vis -a- vis EOCM laser system efficacy against various electro-optic and optoelectronic sensors.

The gadget has selectable energy density threshold level and gives an audio/visual indication when the energy density actually available at the target plane is above the set value. It can be used with both free running as well as Q-switched lasers. The gadget can handle free running lasers with pulse width in the range of 100 -s to 600 -s and Q-switched lasers with pulse width in the range of 10 ns to 100 ns. The device offers three possible range selections of 5 -J/cm2 to 50 -J/cm2; 5 mJ/cm2 to 50 mJ/cm2 and 5 J/cm2 to 50 J/cm2 thus making it possible to evaluate EOCM lasers producing pulse energies from hundreds of mili-joules to several kilo-joules. The detector unit has a provision for auto shut-off after 15 s to enable firing of multiple shots. It is battery operated and needs no human intervention at the target point.