Optical Illumination Technique - Diffuse Lighting
Some of the most difficult targets to properly illuminate are three-dimensional objects that are highly-reflective (e.g. medical devices, electronic components, etc).
With typical lighting, images of these objects usually contain areas with extreme glare, while other parts of the target are dark.
By using a diffuser attachment, light is uniformly spread over an area to provide the best possible illumination for clear observation of the target.