LED Lighting Vision System Peripheral Equipment CA-D Series

Dome LightsProviding diffuse illumination to create a uniformly lit surface

Construction and imaging examples

Dome light illumination techniques

A dome light radiates indirect light at various angles due to the LEDs being mounted facing up and shining into the dome. When standard lighting is used, direct reflection from the part can result in a hotspot (halation), causing inspection and reliability problems. As the dome light diffuses at all angles, a target with a complicated shape can be uniformly lit, eliminating hot spots and increasing inspection stability.

Camera/light arrangement


Print on shiny metal/plastic package

With standard lighting

Due to the shiny surface and inconsistent shape the print cannot be recognised.

With dome light

The dome light ensures the text can be recognised by illuminating all parts of the target with diffuse light.

Plastic cap

With standard lighting

The standard light’s LEDs can be seen and interfere with the inspection.

With dome light

The diffuse light ensures uniform illumination across the whole cap.

Print on the bottom of a curved can surface

With standard lighting

Due to the curved glossy surface the light being used creates a hotspot (halation).

With dome light

As the dome lights from all alignments the light is uniform across the curved areas.