How far is the propagation distance of deep UV uvc-led in water?
发布时间：2021-12-02 13:07
来源：萤光创新
Pure water and tap water show good transmission characteristics to light with wavelength between 250 ~ 800 nm. The transmittance of 5mm thickness is more than 80%. When the wavelength is shorter than 250 nm, the optical absorptivity increases rapidly. Especially tap water has stronger light absorption of < 250 nm. 2.4cm attenuation to 70%; 8.5cm attenuation to 30%; 16.3cm attenuation to 10%.
On the basis of the topic of effective distance, how far is the penetration distance of UVC ultraviolet in water? It all goes back to the concept of bond energy. In water molecules, the bond energy of H-O bond is 485kj / mol, corresponding to 4.98ev, that is, about 249nm. Therefore, when testing the transmission spectrum of pure water, it is measured that the absorption edge begins to decline at about 249nm. Based on this data, it can be said that tap water with less impurities in normal drinking water does not have strong absorption of 275 nmuvc-led, and the ultraviolet sterilization device based on UVC sterilization principle can kill a long distance.
The most important consideration should be the rapid divergence of light in the process of propagation, resulting in a sharp decline in distal intensity. Hemispherical small angle packaging is actually very common in the UVA industry, which is also applicable to UVC packaging. Small angle light can make UVC spread further. It is very suitable for manufacturers such as water cups, long water tanks and overflow water sterilization devices.
High ambient humidity does not cause obvious absorption of UVC, which means that even in the sauna room, UVC ultraviolet can be used for real-time sterilization.
Qingdao fluorescent Innovation Technology Co., Ltd. has a professional postdoctoral team, focusing on the research of ultraviolet sterilization application. After years of deep cultivation in the ultraviolet industry, the company has obtained a number of national invention and utility model patents. At present, a number of sterilization module products have been put into the market. For more details, you can browse the company website www.qdyingguang.com, contact the company for WeChat's official account.
Keywords: UVC, UVC led, deep ultraviolet, ultraviolet sterilization, ultraviolet disinfection, deep ultraviolet LED, water sterilization, water disinfection, air sterilization, air purification, flowing water sterilization, static water sterilization
