Diffuse Lighting

Diffuse lighting is used in machine vision systems to illuminate objects uniformly while reducing specular reflections. By distributing light across multiple angles, it creates homogeneous illumination with minimal shadows and glare. In practice, this results in stable imaging conditions, especially for reflective materials such as metal, plastic, and glass.

The effectiveness depends on the level of diffusion and system geometry; increased diffusion reduces reflections but also lowers sensitivity to small surface defects. A common mistake is using diffuse lighting when directional contrast is required, such as in scratch detection. The interaction with lens aperture and exposure becomes important to maintain sufficient signal levels.

Diffuse lighting is widely used in quality control, electronics inspection, and automation, particularly for OCR on printed text under transparent film. In combination with an appropriate camera and lens, it provides repeatable imaging conditions, where selection depends on field of view, surface properties, and required contrast. Our diffuse lighting solutions are available in various sizes, wavelengths, and power levels for industrial use.