Flat dome illumination
A different method of producing diffuse, uniform illumination is to use a flat dome. This special form of front light illumination combines the advantages of coaxial front lights with those of common dome illuminations. A flat dome enables a shadow-less illumination of most objects. Using a special hole template on the diffusor, perfect light scattering is secured and homogeneous, diffuse light is spread over the object. As this illumination occupies less room than a dome light, it can also be used for applications with limited space offering close to dome performance.
Application examples range from inspection of blister packages to control of metal stamping machines monitoring the cuts on reflective surfaces. In general this technique is suitable for any application requiring an even, shadow-less, diffuse illumination of curved uneven surfaces.