Glossaire technique
Illumination
Selecting and correctly configuring the optimal illumination setup is one of the key factors when designing a vision system. Missing image information caused by incorrect illumination makes subsequent analysis much more difficult or even impossible, as no analysis algorithm can recover information that has never been captured.
Advanced illumination solutions
Getting the best image is a combination of the right illumination, the right lensing and filters to complement and enhance the features in the image with a camera that is set up correctly.
Backlight illumination - diffuse
Technique positioning a diffuse illuminator behind the object to produce a silhouette.
Bright field illumination
Most common technique for illuminating diffuse, non-refelctive objects.
Collimated backlight illumination
This form of backlighting is useful for measurement tasks that require a homogeneous illumination with no scattered ligth.
Collimated coaxial illumination
Collimated light source especially useful for detection of shallow flaws on on flat, reflective objects.
Collimated light
Collimation is a method of controlling illumination so that the light rays are parallel.
Dark field illumination
Illumination mainly used to highlight surface defects, scratches or engraving.
Darkfield backlight illumination
Dark field illumination for detection of defects such as scratches, on transparent objects, or to check the quality of embossed or raised lettering.
Direct and diffuse light
Most suppliers deliver versions of their lights either with or without diffusers.
