Counter/anti, missile defense systems against flares

 Maybe:
1 A missile with a thermal camera if possible, that will see the difference between a flare and the actual military plane it needs to hit.
-One: Through the amount of heat
-Two: Through the size of the flare and the heat output of the military plane
2 With a laser that scans the air, more like a barcode scanner (I can't find the reach)

And maybe more ideas.