We are maker of Auto Darkening Filter in Taiwan. It is aglass lens with fully automatic and responsive color shadeprotection for welding workers' eyes. So, we named itVision Guardian also. As you know, auto darkening filter issupplied by few makers in the world, such as ADF(Sellstrom)in U.S.A., Opt rel in Switzerland or some from Germany andJapan. Now, we are currently the only institute in Taiwanto break through the technique bottle-neck on the ICcircuit and metallic plating testing for lens. We havedeveloped four models for users' choice. 
Taiwan