Understanding the parameters of the UV curing system is conducive to our understanding of the curing system and help in the work, and today, Auvcure Xiaobian will share this knowledge with you. In general, the basic optical parameters of the [UV LED curing] system include:
1. Peak wavelength
The wavelength emitted by the UV LED is determined by the selected/engineered semiconductor and doping material. Unlike traditional UV lamps, UV leds emit a “monochromatic equivalent” spectrum (or a peak) with a specific peak wavelength and a relatively narrow bandwidth, typically between 9 and 15nm compared to the bandwidth of visible leds. Spectrometers are needed to describe the wavelength parameters of UV LED curing systems.
2. Peak irradiance
Irradiance is a measure of the intensity of radiation energy emitted from a UV LED that reaches the surface of a specific application. It is expressed in units of W/cm2 or mW/cm2. Irradiance decreases exponentially with increasing distance. In the indicators of UV LED curing systems, peak irradiance is used as a key parameter. By definition, peak irradiance is the highest irradiance measured by a photometer or ultraviolet energy meter at a reference point.
The indicator data sheet for UV LED curing systems usually gives the measurement location of the peak irradiance, indicating that it is at the emission window, or a specific distance from the emission window. However, some indicator data sheets do not give accurate measurement location information, including distance and lateral position, such as in the center, edge or corner of the area involved. This can confuse the end user and may invalidate the performance comparison results of the metric data table.
3. Energy density
The measurement of energy density refers to the collection of irradiance at a particular time, expressed as the number of joules per square centimeter (J/cm2). In conveyor systems, the measurement of energy density is often used as a parameter to determine UV curing capacity. The end user can adjust the speed of the conveyor belt to set the correct energy density, so that the intensity emitted by the light source is constant.
4. Uniformity
Another important parameter is the uniformity of the UV light distributed at a given location. Not all UV curing systems release a consistent amount of energy across the curing region. Uneven distribution can lead to poor curing quality of the adhesive, or even insufficient curing.
Uniformity is the variation in the distribution of energy over a particular distance and region. It is characterized by the ratio of the highest and lowest irradiance in a given area and expressed as a percentage. In order to establish consistency in the process, the end user can adjust the measurement position during the measurement process and adjust the UV curing system accordingly.
Other important parameters not specifically discussed in this article are the operating temperature and the ambient temperature. As mentioned earlier, UV leds are temperature-sensitive devices. The output power decreases with the increase of temperature, and the life of the luminous parts will be shortened accordingly. UV LED curing systems need to be installed and operated according to the manufacturer’s instructions on how the system is cooled so that it can be operated at maximum production capacity.
Auvcure is a professional manufacturer of all kinds of UVLED point light source, [UVLED line light source], UVLED surface light source and [UV curing machine], and can provide solutions and customization according to the actual needs of customers. The company has Japanese production technology, products are exported to South Korea, Japan, the United States, Brazil and other places. Welcome friends from all walks of life exchange guidance. If you want to know more about [UV light fixed machine] relevant information, welcome to online consultation customer service or call the company’s service hotline for consultation, we will be happy to provide you with quality service! Some of the information/pictures in this article are from the Internet, only for the purpose of sharing new information in the industry, not for commercial use. If any rights are involved, please inform us immediately, and we will delete it immediately. Thank you.
