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Non-Contact Laser Beam Measurement

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Non-Contact Laser Beam Measurement

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Automated laser welding is popular within the manufacturing industry and there are new applications being developed constantly. One of the top goals for improving system performance is to ensure real-time optimization as the resulting welded joint can only be proofed by destructive material sampling or time- and cost-intensive ultrasound examination. If weak spots are detected in the welds, the bad parts need to be rejected. This is disadvantageous because all production costs to make the part have already been incurred. Ensuring a consistently high-quality weld in a proactive manner is preferred and reduces overall costs. The ability to measure the laser beam in a non-contact manner offers key advantages. A non-contact method developed by MKS Ophir is based on Rayleigh scattering. Rayleigh scattering is the scattering of light by particles that are smaller than the radiation's wavelength, e.g. by oxygen or nitrogen molecules in the air.

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