What is UV grade fused silica?
UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in the ultraviolet region down to 195 nm.
Is silica UV resistant?
It will not fluoresce under UV light and is resistant to radiation. For high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage.
Is silica better for Windows?
When compared to N-BK7, fused silica has better homogeneity, a lower coefficient of thermal expansion, and a lower index of refraction for any given wavelength. This makes it ideal for applications which need good transmission deep into the UV range.
Does silica absorb UV?
The high absorption of UV grade used silica around 2µm will lead to heat generation and potentially cause damage. However, IR grade fused silica optical components often have a higher cost and lower availability. Understanding your application’s wavelength range is important for selecting the appropriate substrate.
What is the difference between fused silica and quartz?
The terms “fused silica” and “fused quartz” are often used interchangeably. More accurately, “fused quartz” refers to an amorphous solid formed by melting naturally-occurring quartz. So, while fused silica is ostensibly pure SiO2, fused quartz contains impurities depending on the quartz that was used.
How much UV is in a glass?
Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home and potentially affect your skin.
Can UV pass through silicone?
However, silicone coatings do not break down due to UV exposure. Despite this being one of the most common objections we hear when discussing silicone, it’s not true. Thanks to its chemical formulation, silicone is actually extremely UV stable.
What is fused silica glass used for?
Fused silica and quartz are used in the manufacture of many optical parts—such as lenses, mirrors, UV and IR transmitting optics, and metrology components—due to their ability to transmit light in the visible, ultraviolet, and infrared range. Semiconductors.
Is fused silica glass?
Fused Silica is an entirely synthetic material, and is technically the purest glass. It has the highest temperature characteristics of any glass, and it often begins as pure silicon gas.
How much UV do windows block?
A single-pane window lets in 90 percent of UV radiation and a standard double-pane window lets in over 80 percent. Museum Grade window inserts block 98 percent of the ultraviolet radiation from damaging your belongings through your windows.
Do glass windows block UV rays?
In summary, typical window glass such as that found in homes will block most of the UV light from entering your house with the exception of UV-A light. Exposures to UV-A light can affect your skin if you have extended exposures to the light.
Is Silicon transparent in UV?
Introduction. Transparent silicone materials have outstanding properties including good flexibility, ultraviolet (UV) resistance, thermal resistance, dimensional stability, a wide range of service temperatures, high transparency, and minimal moisture absorption.