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.
LTPRSMHP3W series are LED pattern projectors specifically designed for the most demanding 3D profiling and measurement applications.
Triangulation techniques require that structured light is directed onto a sample at a considerable angle from vertical. Tilting the light source pattern becomes essential to ensure that the patterned light is properly and homogeneously focused across the entire sample surface.
LTPRSMHP3W pattern projectors integrate a precision tilting mechanism based on the Scheimpflug condition. This also ensures that the focus doesn’t change when the pattern is tilted. Moreover, the internal focus mechanism offers the maximum optical throughput. The projected light path is effectively coupled to the pupil aperture of any C-mount lens.
KEY ADVANTAGES
- Scheimpflug tilt adjustment
For homogeneous focusing of the pattern features. - Tilt adjustment compatible with C-mount optics
Focus is maintained even when the pattern is tilted. - Light condenser focusing mechanism
For excellent optical coupling and light throughput. - Enhanced optical power
Due to the high numerical aperture condenser lens.
