In today's era where people are pursuing a healthy lifestyle, disinfection and sterilization have become the focus of attention. Traditional ultraviolet disinfection methods, though effective, come with certain safety hazards. However, the 222 nm UVC ultraviolet filter we are going to introduce today can be called a new "magic tool" for safe and efficient sterilization, bringing us an entirely new disinfection experience!

222 nm falls within the UVC band (200–280 nm) with a photon energy of approximately 5.58 eV, boasting strong capability to break chemical bonds. It propagates smoothly in the air but is absorbed upon encountering ozone. Its penetration depth in biological tissues is extremely low, only a few micrometers, failing to reach even the dermis of the skin or the deep corneal layers of the eyes. Compared to 254 nm ultraviolet light, it is significantly safer for human eyes and skin.

222 nm ultraviolet light can destroy the DNA/RNA of bacteria, viruses, and fungi, rendering microorganisms incapable of replication. Whether it is the stubborn drug-resistant bacterium MRSA, or influenza and COVID-19 viruses that are prone to mutation and transmission, few can survive in its presence.

In hospital operating rooms and ICUs, 222nm ultraviolet light can quickly disinfect air and surfaces. In public places such as subways and airports, it can sterilize highfrequency contact areas like handrails and seats. What's most impressive is that it enables "human-machine coexistence" – people don't need to leave the disinfection area like they do when avoiding traditional 254nm ultraviolet light. However, the irradiation dose still needs to be properly controlled.

In the manufacturing of electronic components and 3D printing processes, 222 nm ultraviolet light can enable rapid curing of materials; it can also modify material surfaces to enhance their hydrophilicity or adhesion.   In the field of scientific research, it can be used for the photocatalytic decomposition of volatile organic compounds. In biological experiments, it can selectively inactivate microorganisms without damaging mammalian cells, providing researchers with a new research tool.   Currently, 222 nm ultraviolet technology still faces some challenges. For example, the light emitted by ordinary ultraviolet lamps contains not only 222 nm wavelengths but also some stray light; more research data is needed to support the biological safety of long-term use for special groups such as children and pregnant women.   Our 222 nm UVC ultraviolet filter is developed based on this principle, specifically designed to filter and selectively transmit ultraviolet light of specific wavelengths. It boasts multiple excellent properties: high transmittance, high cut-off depth, good film compactness, and a long service life. Moreover, the 222 nm UVC filter enables "human-machine coexistence." This means that UVC disinfection equipment equipped with this filter can be used with confidence in spaces where people are present, without causing adverse effects on human skin and eyes, thus greatly improving safety.   To produce high-performance ultraviolet filters, we adopt advanced coating technology, high-performance quartz substrates, ultra-high-purity coating materials, and exquisite production processes. We have mass-produced high-performance 222 nm UVC ultraviolet filters, with a central wavelength transmittance of over 55%. The cut-off range covers ultraviolet, visible, and near-infrared bands, and their performance reaches the industry-leading level. The specific technical parameters are as follows:

Substrate Material: Ultraviolet Fused Quartz (JGS1)

Central Wavelength (CWL): 222 nm±2 nm

Cut-off Range: 200 nm ~ 2000 nm

Peak Transmittance (T peak): >55%

Cut-off Depth: OD3 (Note: Cut-off depth affects transmittance)

Incident Angle: 0°   

External Dimensions: Customized according to customer requirements

Surface Quality: 20/10