A projectile impact energy and location measurement system is taught employing a target apparatus having an impact plate of a solid durable substance such as steel or titanium. Disposed over the plate is a layer of elastoluminescent material composed of zinc sulfide and manganese embedded in an elastomeric...http://www.google.com/patents/US7278290?utm_source=gb-gplus-sharePatent US7278290 - Projectile impact energy and location measurement system
