Knight Optical’s UV Fused Silica Lenses for Flame Detection

11 Oct 2019

Thanks to a high transmission in the near-infrared (NIR) waveband (approximately <92% avg 400-2000nm), UV Fused Silica is an excellent component choice for flame detection applications. The benefit of UV Fused Silica’s high transmission enables flame detectors to identify different wavelengths accurately; offering a clear distinction between spectrums.

With a high melting point (compared to N-BK7 [or equivalent] substrates), UV Fused Silica can also withstand high-temperature environments. Its low coefficient thermal expansion (0.55x10-6K-1 at 300K) compared to N-BK7 (or equivalent) (7.1x10-6K-1) results in quality optical performance when subjected to high temperatures.

Similar to N-BK7 (or equivalent) in performance, UV Fused Silica has a remarkably similar average transmission over the visible range, up to approximately 2000nm, and a slightly lower refractive index. The Abbe constants of UV Fused Silica are also very similar to that of N-BK7 (or equivalent), although somewhat higher.

Typical Specs:

Material: UV Grade Fused Silica

Operating Wavelength: 587nm

Diameter Tolerance: +0 / -0.10mm

Centring Tolerance:

Focal Length Tolerance: ± 0.2mm (<10mm), ±2.0% (10mm – 1000mm)

Centre Thickness Tolerance: ±0.2mm

Surface Figure: 3/ 3 (1)

Surface Quality:

Coating: Optional

First-Class Quality

Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department.

To discover how we can enhance your supply chain experience and to learn more about our custom-made UV Fused Silica Lenses, contact a member of our technical sales team today.

UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com

Tel +001 401-583-7846

View our QA and Metrology information