Europe, UK, Asia & RoW: [email protected] +44 (0)1622 859444 | USA & Canada: [email protected] +1 401-583-7846

BREXIT UPDATE: Knight Optical will continue to provide quality assured service for all your optical requirements both custom & stock. We will handle all requirements caused by the new regulations.


Looking For a Custom Optical Solution? Enquire

UV Windows

Knight Optical provide a range of custom UV grade optical windows manufactured from Quartz and UV grade fused silica for applications in the UV region.

Custom UV grade quartz windows: Custom quartz windows can be used at temperatures up to 1050°C and has a high average transmission of over 80% from 260nm to 2500nm. Our custom quartz windows are useful for most UV applications other than fluorescence applications as quartz material fluoresces. Our custom quartz windows are also not useful in wavelength applications less than 250nm where transmission drops to just 72%. For deep UV custom windows at 175-185nm UV fused silica is a more suitable choice of material. Quartz is available in large 1000x1000mm sheets so large custom quartz windows to any shape or size can be produced. Our stock quartz windows can also be edged to bespoke sizes at short notice or antireflective coated to increase transmission performance.

Custom UV grade fused silica windows: Our custom range of UV fused silica windows are made from Corning 7980 grade 2G, which is the equivalent of Spectrosil 2000 also referred to as Spectrosil B. Custom UV grade fused silica windows have excellent UV transmission working efficiently at 175nm, making them ideal for spectroscopic instruments in the UV. Our custom ranges of UV fused silica windows also have excellent chemical stability, can be used up to 1050°C and are virtually free from fluorescence. Our custom UV fused silica windows can be supplied uncoated or UV antireflective coated for 248-400nm increasing throughput performance. Stock uncoated and AR coated fused silica windows can be edges to smaller diameters or special shapes at short notice for your custom UV window application.

Knight Optical supply high quality custom UV grade windows for a range of ultraviolet applications, industries and sectors. Every component is individually tested on our Agilent Cary 5000 spectrophotometer fitted with UMA and DRA devices which operates from 175nm to 3200nm. Our Agilent 660 FTIR spectrophotometer is used for testing materials between 3.5µm and 45µm. All tested by our highly skilled technicians in our state of art metrology lab to ensure all components meet our high quality standards.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality custom UV optical windows can improve your product and supply chain experience.

Our 2021/2022 Catalogue

Inside Knight Optical’s catalogue you’ll find details of the industries we serve as well as the many other services we can offer. It also showcases hundreds of our most popular products, supported by useful technical information, to help you choose the right part for your application.
Click below to view our digital catalogue now.

view our catalogue

Choose Language