The role of glass in ultraviolet lamps

Update:01 Apr 2021

Glass plays an important role in ultraviolet (UV) lamps […]

Glass plays an important role in ultraviolet (UV) lamps. Glass can be used to control the transmission of specific wavelengths of ultraviolet light. When used in windows, glass panels can prevent harmful UV bands. The following describes the role of glass in ultraviolet lamps.

Glass and UV tape

Glass can help block ultraviolet radiation and allow specific ultraviolet bands to pass through. For example, it is known that window glass can block UVB wavelength ultraviolet rays while allowing UVA wavelength ultraviolet rays to pass through. We know that the UVB wavelength range is between 280-320nm and the UVA wavelength range is between 320-400nm. In industrial applications, UVB is suitable for projects that require moderate light penetration, such as general paint curing. While UVA can be used for deep curing, TANK007 UVA purple flashlight is often used for curing colored paint and thick varnish.

In the dental industry, coated glass is used to separate specific UV bands to polymerize composite materials. "In the original design, the use of coated glass can block the separation of unnecessary UV bands and apply the required UV bands to the polymer composite.

The pass rate of several common glasses in UVAZ. Transparent glass can pass 75% of UVA light. Colored glass and reflective glass can block more visible light, which is more effective in high-light environments. Laminated glass and UV-resistant coated glass provide excellent UV protection. Laminated glass consists of two layers of glass with a plastic film in between, which can provide additional protection. This type of glass panel can be found in commercial buildings, such as airports and museums.

UV protection of glass and quartz in halogen lamps

Halogen lamps can emit ultraviolet light. Halogen ultraviolet lamps rely on quartz to improve their heat resistance. Quartz has good permeability, which also determines that quartz cannot filter specific ultraviolet rays. As a solution, manufacturers use special types of quartz and UV blocking additives. The use of heat-resistant high-boron glass for encapsulating quartz bulbs can block harmful UV bands and play a protective role.