Siemens NERLITE DOAL-50

Siemens' DOAL-50 LED Illuminators provide diffuse illumination in the same optical axis as the camera. DOAL’s provide up to twice the light intensity of their predecessors, are passively-cooled (no fans) and suitable for clean room environments. DOAL (Diffuse On-Axis Light) Illuminators provide diffuse, uniform illumination for flat specular surfaces. With the coaxial lighting approach, specular surfaces perpendicular to the camera appear bright, while surfaces surfaces which are marked or embossed absorb light and appear dark. By providing greater uniformity than conventional sources, DOALs increase machine vision accuracy and repeatability

The DOAL is designed for applications that have flat specular surfaces requiring uniform lighting. With the DOAL, light rays reflect off the beam splitter directly on to the object at nearly 90°. This lighting technique helps bring out surface textures, elevation changes and translucent features.