Ultraviolet spot lamps

Ultraviolet spot lamps.

UV spot lamps (or spot curing systems) are used when it is necessary to concentrate UV light onto a very small area to achieve high irradiance, typically to trigger the curing of an adhesive or resin via photocatalysis.

Most of these units are desktop-sized and can be divided into two main groups, depending on whether they are equipped with an optical guide to direct the ultraviolet light to the target area.

Systems without optical guides are equipped with a concave mirror that reflects UV light toward a lens system, which focuses and directs it onto the surface to be irradiated. This generates a high-intensity ultraviolet beam. These systems are particularly useful for irradiating areas up to 30 mm in diameter, provided the target area of the object can be positioned directly under the beam emitted by the equipment.

Systems equipped with an optical guide are designed to focus ultraviolet light—primarily manually—onto an area between 5 and 8 mm in diameter, depending on the thickness of the selected optical guide. These systems can be fitted with multiple optical cables to facilitate the simultaneous illumination of several zones once positioned, or to perform various scans with the light beams within an automated installation.

Regardless of the model, all of these UV spot lamps are equipped with a shutter that allows for precise control of the surface exposure time to UV light. This can be operated via a foot switch or through a control system—which can be integrated into the unit or external—facilitating seamless integration into automated production lines.

[Image showing a UV shutter mechanism and digital controller interface]

As for the emission characteristics of the ultraviolet lamps used in this product line, options range from 250W medium-pressure UV lamps to high-power emitters that provide an irradiance of 20 W/cm². The use of various emission spectra, and even specialized filters, is possible and significantly expands the versatility of these units.

Features:

• Diverse Spectra Available.
• Versatile Shutter Control: The shutter can be operated via a foot switch for manual tasks or fully integrated into a PLC/SPS (Programmable Logic Controller) for automated production.
• Multiple Optical Guides: A single unit can support several optical cables, allowing for the simultaneous irradiation of different points or zones.
• Air-Cooled System: Includes an integrated cooling system equipped with dust and particle filters to ensure internal cleanliness and optimal performance in industrial environments.

Recommended applications:

• Curing of Lacquers, Adhesives, and Filler Resins: Ideal for high-speed assembly lines where instantaneous bonding of UV-sensitive materials is required. The high irradiance ensures deep penetration and a complete cure in seconds.
• Research: A versatile tool for lab. scale experiments, allowing researchers to study the effects of concentrated UV radiation on specific molecular bonds or material surfaces.
• Photopolymerizations: Providing the precise photon flux and specific wavelengths (e.g., 365nm or 405nm) needed to initiate and control polymerization reactions in advanced materials science.