A dome light radiates indirect light at various angles due to the LED’s being mounted at the surface and shinning up into the dome. When standard lighting is used direct reflection from the part can result in a hot spot (halation) causing inspection and reliability problems. As the dome light diffuses at all angles a target with a complicated shape can be uniformly lit with diffuse light from all angles eliminating hotspots. As the target is uniformly lit a stable reliable inspection can be easily setup.
Due to the shiny surface and inconsistent shape the print cannot be recognised.
The dome light ensures the text can be recognised by illuminating all parts of the target with diffuse light.
The standard lights LED’s can be seen and interfere with the inspection.
The diffuse light ensures uniform illumination across the whole cap.
Due to the curved glossy surface the light being used creates a hotspot (halation).
As the dome lights from all angles the light is uniform across the curved areas.
The above image displays the relative brightness across a 10000 point grid for the CA-DD Series. Although the intensity varies with each model type, the associated illumination distance and relative brightness across the area are consistent.
The brightest areas (shown in red) are considered 100% relative intensity and the dullest areas (shown in green) are considered 0% relative intensity. The images display the intensity differential across the area. By comparing the changes in the intensity differential for different lighting heights (LWD) the ideal lighting range can be realised with the relative brightest points being 100%.
* The above data are representative examples. This is not a guarantee of the product quality.
* LWD is the distance from the illumination to the measurement target.