UVClamppuja

UVClamppuja is a term used in technical literature to refer to a compact instrument designed to confine and regulate ultraviolet exposure for small samples. The name combines "UV" for ultraviolet and "clamp" implying a holding or restricting function. The device typically integrates a UV light source, such as LEDs or lamps emitting in the UV-A to UV-C range, with a sample holder and a clamping mechanism that fixes the sample at a defined distance and orientation from the source. A key feature is regulated irradiance, achieved by adjusting the lamp output, distance, and sometimes attenuation filters. Many models include built-in sensors to monitor irradiance and provide feedback to maintain a chosen exposure dose.

Applications include polymer curing, surface modification, photochemical research, and educational demonstrations where uniform UV exposure is required across a sample. Variants range from compact benchtop units to larger enclosures for batch processing. Safety features commonly include interlocks, UV-shielding enclosure, and warning indicators; operators should use appropriate personal protective equipment and follow safety guidelines.

Advantages include precise control of dose, repeatability, rapid shutoff, and a compact footprint. Limitations include the need for regular calibration, potential spectral mismatch between the source and material absorption, heat generation, and higher cost compared with non-UV devices. The term UVClamppuja is not universally standardized and may be used in vendor literature to describe different instrument configurations with similar clamping and irradiation functions.

See also: UV curing, photoinitiators, radiometry.