…changes are observed as pixel shifts in the camera Laser line projector Camera Projected laser line Direction of part motion Object under test z y x Integration Insights Understanding laser-based 3D triangulation methods Laser-based 3D triangulation systems can be configured in numerous ways to…
…produces a line of
illumination that appears distorted from perspectives
other than that of the projector. These distorted
perspectives can be used for an exact geometric
reconstruction of the surface shape.
In a typical 3D triangulation sensor, the laser line
…common, laser triangulation architecture is the single straight line
projection geometry. Here, simple optics fan out the laser beam so that it forms a straight line of
illumination on the part. When viewed by a camera from an angle different from the projector, the line is
…But there are many different ways to implement a laser line projection system. Each has its own characteristics, advantages and disadvantages. In triangulation (Figure 1), a laser line is projected onto a part, and a camera views the line and analyzes its shape dynamically to reconstruct…
vegetables with blemishes from food processor lines or can ensure that the
right colored capsule goes in the correct bottle in drug packaging lines.
Another laser application is alignment. In computer assembly, a laser system can help an operator determine if a
Tecnalia produces vision-based
automated surface inspection and
triangulation sensors (3-D measurement), mainly for hot conditions.
Z-Laser produces laser line projectors
for 3-D vision applications (output intensities: 1 to 6000 mW; wavelengths:…
changes and surface irregularities.
In this relatively simple application, a single line
projection spans the diameter of the clutch plate as it
is rotated. Triangulation of the red line image then
provides a high resolution scan of the entire plate.
…given spot diameter or line thickness.
Laser vision is also used to check the alignment of wheel and tire during
mounting on to cars on the production line, e.g., relative to the steering
mechanism. Here the laser module projects a pattern of parallel lines on to
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