SWIR LEDs are commonly created out of Arsenide, Gallium, and Indium. The technology mainly uses InGaAs lattice in order to capture as well as emit light that is found in the SWIR wavelength.
As mentioned earlier, it’s crucial to choose the correct SWIR illumination and the optimal wavelength for successful results. SWIR LEDs have to follow the same principles used for the inspection of visible light.
Depending on the application, it’s possible to use singular or multiple SWIR illuminators. That includes darkfield lights, backlights, front lights (on-axis), dome lights, bar lights, ring lights, and more. When using SWIR LEDs, the most efficient results are gained with high uniformity. Plus, it requires an appropriate intensity, coverage area size, and contrast without specular reflection.
