What Is Welding Helmet?

Figure 1.1 welding helmet is a type of headgear used when performing certain types of welding to protect the eyes, faces and neck from flash burn, ultraviolet light, sparks, infrared light, and heat .
Welding helmets are necessary to prevent arc eyes, and it can also prevent retina burns, which can lead to a loss of vision. Both conditions are caused by unprotected exposure to the highly concentrated ultraviolet and infrared rays emitted by the welding metal. Ultraviolet emissions from the welding arc can also damage uncovered skin, causing a sunburn- like condition in a relatively short period of welding.
Most welding helmets include a window covered with a filter called a lens shade, through which the welder can see to work. In most helmets,