What is the use of ultraviolet light

Uses of long-wave ultraviolet lamps:

Ultraviolet light is a kind of light wave invisible to the naked eye, which exists outside the ultraviolet end of the spectrum, so it is called ultraviolet light. It is a kind of light wave, which is divided into A, B, and C bands according to different wavelength ranges. The wavelength of ultraviolet rays in the A band is between 320 and 420nm, and its central value is 365nm. It is commonly used in industrial glue curing, tungsten Mine identification, fluorescence detection, biopolymerization, oil pollution detection, ore exploration, criminal detection, textile industry, archaeology, medical treatment, stage, nightclub, theater and signal lighting. Shanghai Fengzhi Instruments supplies all kinds of UV lamps from stock.

Many ores will fluoresce under ultraviolet radiation, and different wavelengths of ultraviolet light will emit different fluorescence. At the same time, under the same ultraviolet radiation, the chemical composition of the ore is different, and the fluorescence color will be different. Therefore, Ultra-Thin LED Industrial And Mining Lamp
has become an important method for ore detection. Means. Shanghai Fengzhi Instruments supplies all kinds of ultraviolet lamps from stock, and uses ultraviolet lamps to stimulate the fluorescence of oils and fats to detect oil stains/stains on workpieces, and appraisers use them to detect the authenticity of antiques. Many pigments today contain phosphorus, which glows under ultraviolet light, while most of the older pigments do not, and maintenance personnel use them to find invisible cracks in machinery — by injecting a small amount of fluorescent dye into the fuel Supply and shine it with ultraviolet light, which law enforcement officials can use to verify the authenticity of money. The United States and many other countries use an invisible fluorescent strip on their denominations that only shows up under ultraviolet light, and they are used by forensic scientists to analyze crime scenes. To capture fingerprints, for example, they are usually sprinkled with fluorescent dyes under ultraviolet light. This makes it easier to take fingerprints.

Uses of short-wave ultraviolet lamps:

Short-wave ultraviolet lamps are also called ultraviolet germicidal lamps and ultraviolet disinfection lamps. Ultraviolet disinfection and sterilization are widely used in hospitals, schools, nurseries, cinemas, buses, offices, homes, etc. It can purify the air and eliminate musty smell. A large amount of negative oxygen ions, the room sterilized by ultraviolet rays, the air is particularly fresh. In public places, ultraviolet disinfection can prevent some germs from being transmitted through the air or through the surface of objects. The application of long-life ultraviolet germicidal lamps in water disinfection and environmental protection projects is of great significance. Water disinfection equipment such as pure water systems generally operate 24 hours a day. The life and reliability of ultraviolet germicidal lamps are required to be high. If the lamp life is short , the cost of replacing the lamp tube is high, and it is very inconvenient. The germicidal lamp does not need to be converted into visible light, and the wavelength of 253.7nm can play a very good bactericidal effect. This is because there is a rule in the absorption spectrum of Integral Precision Dia Casting LED Canopy Light waves by cells. The ultraviolet rays at 250~270nm have the largest absorption, and the absorbed Ultraviolet rays actually act on the genetic material of cells, namely DNA, which acts as a photochemical effect. The energy of ultraviolet photons is absorbed by the base pairs in DNA, causing genetic material to mutate, causing bacteria to die immediately or unable to reproduce offspring to achieve sterilization the goal of. Shanghai Fengzhi Instruments supplies all kinds of ultraviolet germicidal lamps from stock.

Uses of UV curing lamps:

UV curing is mainly used for curing the skin surface where the light can directly hit or the inner layer with better light transmission. When the UV lamp produces UV, it will generate a large amount of IR radiant heat. For workpieces that have little influence on temperature, this radiant heat is beneficial. It can accelerate the reaction speed of photocuring, especially for U metal halide lamps, V + anaerobic mixture Type of glue, the effect is more obvious. Application examples: UV coating of wooden floors, metal products, etc., UV insulating coating in printed circuit boards, UV gluing of glass products. For light-cured workpieces that are sensitive to the influence of temperature or have poor temperature resistance, the IR radiant heat attached to the UV generated by traditional UV lamps is a major hazard or even fatal to them. Reducing IR radiant heat is one of the frontier issues in the manufacture of UV curing equipment in the world. It is generally solved by water cooling, reflection, frequency division filtering, etc., but the cost is that part of the ultraviolet light must be lost. Shanghai Fengzhi Instruments supplies all kinds of UV lamps from stock. Shanghai Fengzhi Instruments supplies all kinds of UV curing lamps from stock.

Uses of UV Light Cleaning Lamps:

Photocleaning technology uses the photosensitive oxidation of organic compounds to remove organic substances adhering to the surface of the material, and the surface of the material after photocleaning can achieve “atomic cleanliness”. In more detail: the UV light source emits Collapsible Industrial Hemp LED Plant Lamp waves with wavelengths of 185nm and 254nm, which have high energy. When these photons act on the surface of the object to be cleaned, since most hydrocarbons have a strong absorption of ultraviolet light with a wavelength of 185nm ability, and after absorbing the energy of ultraviolet light with a wavelength of 185nm, it is decomposed into ions, free atoms, excited molecules and neutrons, which is the so-called photosensitization. Oxygen molecules in the air will also produce ozone and atomic oxygen after absorbing ultraviolet light with a wavelength of 185nm. Ozone also has a strong absorption effect on ultraviolet light with a wavelength of 254nm, and ozone is decomposed into atomic oxygen and oxygen. Among them, atomic oxygen is extremely active. Under its action, the decomposition products of carbon and hydrocarbons on the surface of the object can be combined into volatile gases: carbon dioxide and water vapor escape from the surface, thereby completely eliminating the adhesion on the surface of the object. carbon and organic pollutants. At present, the cleaning method widely used abroad is ultraviolet (UV) light cleaning. On the one hand, it can avoid the pollution caused by the use of organic solvents, and at the same time, it can shorten the cleaning process. The cleaning effect of low-pressure mercury produced by ordinary quartz is far less than that of low-pressure mercury lamps made of synthetic quartz.

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