Opto Engineering LED pattern projectors have been designed for 3D profiling/reconstruction and for the measurement of objects with complex structures or inclined planes.
They are successfully used in a variety of applications like quality control in food and packaging to check for correct volume, reverse engineering, dimensional measurement of electronic components, planarity control of products, robot guidance for pick and place and alignment applications.
When compared to laser emitters, LED technology ensures more homogeneous illumination in addition to sharp edges and no speckle effect.
Many 3D machine vision applications require structured light to be projected onto inclined surfaces, i.e. at a certain angle from the vertical axis. In such cases, the focus is maintained only within a small area close to the center of the field of view and the rest of the image shows relevant defocusing thus making 3D measurement inaccurate.
For this reason, the Opto pattern projector series includes special projectors equipped with a high-precision tilting mechanism that allows the pattern of the light source to meet the Scheimpflug condition so that the projected light is properly and evenly focused across the entire sample surface.
Take a look at the Opto Pattern Projector Series to learn more.
Like to learn more about Machine Vision Lighting? Take a read of our Lighting guide with Illumination techniques