Dr. Hönle AG has developed a new lens type for its bluepoint LED UV curing unit series, which focuses the light into a linear irradiation and can therefore cure adhesives with a significantly higher intensity. The high intensity is usually required for applications in which a gap must be irradiated, such as active alignment, rod lens or lens bonding in optics or medical technology, as well as underfills or securing SMDs on printed circuit boards in the electronics sector.
The new optic can simply be screwed onto the LED heads of the bluepoint LED and bluepoint LED eco devices from Hönle – it is not necessary to purchase new LED devices. The new optic is suitable for wavelengths of 365Nm, 385Nm and 405Nm, with the focused light delivering an irradiation area of 10mm x 1mm and can achieve intensities of up to 7,000 mW/cm2. Light is distributed homogeneously across the irradiation field thanks to the special shape of the lens. The optic is particularly suitable for small-area applications where a particularly high intensity is required in a small space – necessary, for example, when curing in gaps. Adhesives dispensed in annular gaps can be cured quickly and reliably by arranging several LED heads in a circle around the circumference.
The bluepoint LED UV spotlight series from Hönle is especially suitable for curing UV adhesives in industrial assembly processes. Compact dimensions of the bluepoint LED head allow integration into the machine even where space is limited. The LED heads are passively cooled and require neither fans nor water cooling. As LEDs do not emit IR energy, curing can take place at low temperatures, this makes LED devices ideal for use with temperature-sensitive substrates.
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