Join through a clear plastic cover.
How can a laser join plastics through a clear cover?
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How can a laser join plastics through a clear cover?
How can a laser join plastics through a clear cover?
Fit the components before testing.
The upper plastic transmits the beam; the lower part absorbs it at their contacting interface. A scanning mirror distributes energy around the seam. Energy per seam length falls when scanning speed rises.
Through-transmission quasi-simultaneous laser welding analogy, reference shows 980 nm. Illustrative energy window, not a welding recipe or material qualification. Heating/cooling and repeated-pass accumulation omitted.
Keep contact and deliver 0.4–0.6 J per millimetre at the seam.
Compare seam energy with laser power and scan speed.