Six application areas for UV sensors
Publish:Box Optronics  Time:2018-10-10  Views:432
UV is mainly used in the following six areas:
1. Application areas in light curing systems:
The typical applications of UVA band are UV curing and UV inkjet printing, representing wavelengths of 395nm and 365nm. UV LED light curing applications include UV adhesive curing in display, electronic medical, instrumentation and other industries; building materials, furniture, home appliances, UV coating curing in automotive and other industries; UV ink curing in printing, packaging and other industries... Among them, the UV LED veneer industry has become a hot spot, the biggest advantage is that it can produce zero-formaldehyde environmentally friendly sheet, and save 90% energy. Large output, resistance to scratching, comprehensive economic benefits. This means that the UV LED curing market is a full-scale and full-cycle application market.
Microelectronics Industry - UV Light Curing Applications:
Mobile phone component assembly (camera lens, earpiece, microphone, housing, LCD module, touch screen coating, etc.), hard disk head assembly (gold wire fixing, bearing, coil, die bonding, etc.), DVD/digital camera (lens, lens sticking) Connection, circuit board reinforcement), motor and component assembly (wire, coil fixed, coil end fixed, PTC/NTC component bonding, protection transformer core), semiconductor chip (moisture protection coating, wafer mask, wafer Pollution inspection, UV tape exposure, wafer polishing inspection), sensor production (gas sensors, photoelectric sensors, fiber optic sensors, photoelectric encoders, etc.).
PCB industry LEDUV light curing application:
Components (capacitors, inductors, various plug-ins, screws, chips, etc.) fixed, moisture-proof potting and core circuits, chip protection, anti-oxidation coating protection, circuit board type (corner) coating, ground wire, flying wire, coil Fixed, wave soldered through hole mask.
Photoresin hardening application:
The UV curable resin is mainly composed of an oligomer, a crosslinking agent, a diluent, a photosensitizer and other specific additives. It irradiates the polymer resin with ultraviolet light to cause a cross-linking reaction to be instantaneously cured. Under the UV LED curing light, the curing time of the UV curing resin does not need 10 seconds, and it can be cured in 1.2 seconds, which is much faster than the traditional UV mercury curing machine. At the same time, the heat is also ideal than the UV mercury lamp. By differently blending the components of the UV curable resin, products that meet different requirements and uses can be obtained. At present, UV curable resins are mainly used for wood floor coating, plastic coating (such as PVC decorative board), photosensitive ink (such as printing of plastic bags), electronic product coating (marking and circuit board printing), printing glazing ( Such as paper, playing cards, metal parts (such as motorcycle parts) coating, fiber coating, photoresist and coatings of precision parts, etc.
The main recommended sensors in the field of photocuring are: GUVA-T11GD (sensitivity: 0.1uW/cm2), GUVA-T11GD-L (sensitivity: 0.01uW/cm2), GUVA-T21GD-U (sensitivity: 0.001uW/ Cm2), GUVA-T21GH (voltage output).
High sensitivity sensors have a larger light response area and a higher price.

2. Medical field:
Skin treatment: An important application of the UVB band is dermatological treatment, ie UV phototherapy. Scientists have found that ultraviolet light with a wavelength of around 310 nm has a strong black spot effect on the skin, which can accelerate the metabolism of the skin and improve the growth of the skin, thereby effectively treating vitiligo, pityriasis rosea, pleomorphic sun rash, chronic actinic dermatitis. In the medical industry, UV phototherapy is now more and more used in the medical industry. Compared to traditional light sources, UV-LED‘s spectral lines are pure, which can guarantee the maximum therapeutic effect. The UVB band can also be applied to the health care field. The UVB band can cause photochemical and photoelectric reactions of the human body, and the skin produces a variety of active substances, which are currently used to regulate advanced neurological functions, improve sleep, and lower blood pressure. In addition, studies have shown that the UVB band can accelerate the production of polyphenols in certain leafy vegetables (such as red lettuce), which are claimed to have anti-cancer, anti-cancer proliferation and anti-cancer mutations.
Medical Devices: UV glue bonding makes economical automated assembly of medical devices easier. Nowadays, the advanced LED UV light source system, which can cure solvent-free UV glue in a few seconds, as well as the dispensing system, makes an effective and economical method for consistent and repetitive bonding of medical device assembly processes. The optimization and control of UV light sources is very important for the manufacture of reliable medical devices. The use of UV-curable glue offers many advantages, such as lower energy requirements, saving cure time and location, increasing productivity and making automation easier. UV glue is commonly used to bond and seal medical devices that require very high quality and best reliability. UV glue curing is typically applied to medical device assembly, such as the need to bond 1) different materials (or different mechanical properties) 2) the material is not thick enough to use the welding method 3) pre-produce the parts.
The main recommended sensors in the field of phototherapy are: GUVB-T11GD (sensitivity: 0.1uW/cm2), GUVB-T11GD-L (sensitivity: 0.01uW/cm2), GUVB-T21GD-U (sensitivity: 0.001uW/ Cm2), GUVB-T21GH (voltage output)
High sensitivity sensor will have a larger light response area and higher price.

3. Field of sterilization:
Due to the short wavelength and high energy, the ultraviolet light in the UVC band can destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in cells of microorganisms (bacteria, viruses, spores, etc.) in a short time, and cells cannot be regenerated. The bacterial virus loses its ability to self-replicate, so the UVC band products can be widely used for sterilization such as water and air. Due to its small size and other advantages, UV-LED can be used as a light source for complete UV (ultraviolet) sterilization equipment. It is suitable for pre-packaging process of various types of structures and various materials for large-volume product flow-through operations; UV (ultraviolet) light source of bacteria machine: suitable for indoor air sterilization in households, public places, etc.; used in various household appliances such as disinfection cabinets and microwave ovens.
Some deep-UV applications on the market include LED deep-UV portable sterilizer, LED deep-UV toothbrush sterilizer, deep-UV LED contact lens cleaning sterilizer, air sterilization, clean water sterilization, food and surface sterilization. . With the improvement of people‘s awareness of safety and health, the demand for these products will be greatly increased, thus creating a larger market.
The main recommended sensors in the field of sterilization are: GUVC-T10GD (sensitivity: 0.1uW/cm2), GUVC-T10GD-L (sensitivity: 0.01uW/cm2), GUVC-T20GD-U (sensitivity: 0.001uW/ Cm2), GUVC-T21GH (voltage output).

4. Flame detection field:
The ultraviolet flame detector is a common name for the ultraviolet flame detector. The ultraviolet flame detector detects the fire by detecting the ultraviolet rays generated by the burning of the substance. In addition to the ultraviolet flame detector, there is also an infrared flame detector on the market, that is, the term is a linear beam smoke detector. The UV flame detector is suitable for use in places where an open flame is likely to occur during a fire. UV flame detectors can be used in places where there is strong flame radiation or no smoldering stage in the event of a fire.
Flame detection UV sensor requires the sensor itself to withstand high temperatures and high sensitivity.
Recommended flame detection field: SG01D-5LENS (with condenser lens, virtual area can reach 11mm2), TOCON_ABC1/TOCON-C1 (can detect pw-level ultraviolet light, with amplifier circuit).

5. Arc detection field:
High-voltage equipment generates arc discharge due to insulation defects. It is accompanied by a large amount of light radiation, which is rich in ultraviolet light. By detecting the ultraviolet radiation generated by arc discharge, the safe operation of high-voltage power equipment can be judged. Ultraviolet imaging is an effective method for detecting arc discharge. It is intuitive and has good detection and positioning capabilities. However, the signal of ultraviolet light is weak and there are some difficulties in detecting it. The arc detection UV sensor requires the sensor itself to withstand high temperature and sensitive arc detection. Recommended models: TOCON_ABC1/TOCON-C1 (can detect pw-level UV, with amplifier circuit).

6, banknote identification:
Ultraviolet recognition technology mainly uses fluorescent or ultraviolet sensors to detect the fluorescent imprint of banknotes and the matte reaction of banknotes. This type of identification technology recognizes most of the ** (such as washing, bleaching, pasting, etc.). This technology is the earliest development, the most mature, and the most common application. It is used not only in the ATM deposit identification, but also in financial instruments such as money counters and money detectors. In general, fluorescent and violet light are used to perform all-round reflection and transmission detection of banknotes. According to the different absorption rate and reflectivity of ultraviolet light from banknotes and other papers, the authenticity is recognized. The banknotes with fluorescent marks can also be quantitatively identified.
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