Precision Direction Sensing Laser Threat Warner

Laser Threat Warner

Laser Science & Technology Centre (LASTEC), Delhi, has developed a Laser Threat Warner capable of giving warning in the form of an audio beep as well as a visual indication with an angular accuracy of 3 when the mounted platform is exposed to laser raDIATions. It can detect laser threats from existing and emerging battlefield pulsed solid-state lasers, such as laser range finders, laser designators and EOCM class of anti-sensor lasers in wavelength range 700-1100 nm. An infantry combat vehicle can use the laser warner to take an evasive action by using some form of countermeasure systems in the event of getting exposed to laser raDIATion from enemy designators. The sensor is adaptable to multiple sensor configurations, for giving total 360 azimuth coverage. One such application would be tank mounted multiple sensor system in which four laser sensors mounted on the tank and spaced 90 apart would provide 360 battlefield coverage. The multiple sensor configuration would particularly suit armoured fighting vehicles, combat vehicles and other similar ground platforms used in a mechanized environment.

Laser threat warner, in the present form, has a field-of-view of 90 in azimuth and -5 to +25 in elevation. It can indicate the laser threats with an angular accuracy of 3. It is also capable of distinguishing between low PRF (such as those from tank range finders) and high PRF (such as those from laser designators) laser threats. It operates from a 12 V DC battery and can be configured to operate from power supply available on any platform. It is compact (165 mm x 175 mm x 195 mm), due to employment of most optimum design methodology and use of state-of-the-art components. The laser threat warner is a total indigenous effort, both in design and implementation.

The laser warner has been tested extensively in the laboratory for a simulated range up to 4 km along with user participation for various critical operational parameters such as range, field-of-view, angle of arrival accuracy, probability of single pulse detection and false alarm rate. It was also successfully interfaced with aerosol grenades to form an aerosol screen for effective defensive countermeasures. The capabilities of the laser warner have been demonstrated live to a large number of delegations from user services.