Optical Coherence Tomography (OCT) Allows Sophisticated Trajectories while Producing High-Quality Laser Welds

Better-quality welds, reduced cost per part, and shorter cycle times are  industrial  goals  that  can  be achieved by using highly focused laser  light.  Precise  and  reliable dynamic  sensing  technology  is required to operate the automated processing laser without direct human manipulation to accomplish safety requirements.
Today, optical coherence tomography (OCT) has gained acceptance as a measurement technique with high precision and reproducibility. OCT as applied to laser welding has already made a step beyond laboratory use, being widely adapted to various laser heads in different branches of the joining industry. OCT brings laser welding to its proper target, ensuring high-quality welds and enabling the reduction of cycle times during welding along sophisticated trajectories or during positioning at challenging joints or low-dimensional e-mobility elements. OCT is beneficial for online omnidirectional seam tracking, exact nondestructive measurement of keyhole depth, and identification of faults and defects at the resulting seam.

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