CLT CRYSTAL LENS TECHNOLOGY

Devices and apparatus for protecting the human eye against radiation, particularly protective eyewear and visors for welding helmets; face protection shields, especially for protecting eyes, in the nature of protective screens, deflectors, hoods, and helmets for welders; sunglasses; optical filters, particularly absorption filters, interference filters, reflector filters, infrared filters, ultraviolet filters, polarizing filters; transmittance-controllable optical filters; automatic electronic devices for controlling radiation transmittance of optical filters