Stray Light Calibration
NSG's FUV neutral density filters not only calibrate for photometric accuracy but also stray light in the UV and VIS range. With one FUV filter you can replace multiple liquid-based stray light verification filters and save thousands:
Most liquid filters validate stray light performance in 3 areas in the UV range and 2-3 areas in the VIS range. For each range a separate kit of liquid filters is required. This could mean that at least 3 kits and, often, a total of 5 - 6 kits of liquid stray-light filters (depending on the type of spectrophotometer) are required to verify stray light performance. Each of the liquid kits for stray light usually costs about $1,000 and these kits can only calibrate in either the UV or VIS, not both.
One of NSG's FUV filters can be used to verify stray light performance in both the the UV and VIS range. This filter replaces over 12 liquid-based stray light filters of leading manufacturers, which allows customers the benefit of saving thousands of dollars on purchasing and recalibrating liquid stray light filters.
Researchers can easily spend over $3,000 on liquid stray-light filters, but the FUV series photometric/stray light filter costs a fraction of this amount. NSG sells these filter for a very low price because our unique technology allows making these filters extremely precise while still being cost effective. We want to ensure that researchers have access to the finest calibration standards available on the market today.
Our FUV filters can also be used to test photometric accuracy in the UV and VIS range, from 200-700 nm.
NSG's FUV stray light/photometric accuracy neutral density filters are NIST Compatible.