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, Opto Engineering’s family of pattern projectors 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.
All Opto Engineering LED projectors feature a wide selection of interchangeable patterns. Furthermore, the size of the projection area can be easily modified by interchanging compatible projection optics: their projectors can be used with different C-mount lenses. To achieve the best results we suggest to use bi-telecentric lenses or zero distortion macro lenses.
LTPRXP series pushes the light output of LTPR LED pattern projectors to extremely high values, making these products the solution of choice for 3D measurement of large objects.
Thanks to the illuminance these projectors can be used as a viable alternative to laser line generators in high-speed, on-line, linescan camera-based applications.
The high power can also be used in order to decrease system sensitivity to ambient light, for example, to perform 3D mapping of objects with illumination levels found in typical working environments.
KEY ADVANTAGES
- Superior optical throughput
For large targets illumination and fast 3D scanning; minimal sensitivity to ambient light. - Perfectly sharp edges
LTPR series ensures thinner lines, sharper edges and more homogeneous illumination than lasers. - Easy LED source replacement.
