In order to protect the eyes or other sensor, from light produced, e.g., byodern laser weapons which have extremely fast onset times and high power per pulse, a protective shutter device is provided which is based on the integrative property of such sensors. The sensor is shielded for a large proportion...http://www.google.se/patents/US5255117?utm_source=gb-gplus-sharePatent US5255117 - Advanced eye or sensor protection and high speed variable optical attenuation system
