Laser Filter Inserts for Goggles, Sun, Wind and Dust

摘要

In order to provide eye protection for military personnel, two types of laser-protective filter elements were developed for use as inserts in the goggles. The elements were designed to be snapped into the goggle frame in back of the standard ballistic lens. A total of 600 Type A filter elements with optical density greater than 4.0 at 400-532 nm and photopic transmission of 44% were delivered to the U.S. Army Natick RDE Center. These elements met contract requirements with the exception of photopic transmission and resistance to sodium hypochlorite solution. A total of 275 Type B filter elements with optical densities exceeding 4.0 from 694-1064 nm were delivered to Marine Corps Systems Command. These elements measured substantially below the desired 25% minimum photopic transmission, exhibited excessive optical distortion and dye nonuniformity, lost abrasion protection after contact with sodium hypochlorite solution, and lost hardest adhesion after simulated exposure to sunlight.