Example of real-time auto-focusing in laser marking (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Example of real-time auto-focusing in laser marking

Caption

The left figure displays the surface position during the real-time auto-focusing laser marking of a two-step surface made by adhering three pieces of silicon wafers. The three surfaces are labeled by A, B, and C. The right figure shows the 3D microscopy of the two-step surface where the line in the center demonstrates the uniform laser marking on the stepped surface. Compared with conventional fixed-focus processing, the dynamic z-scanning auto-focusing approach reduces defocused laser pulses and increases the processing speed when processing non-flat or varying surfaces.

Credit

by Xiaohan Du, Camilo Florian, Craig B. Arnold

Usage Restrictions

Credit must be given to the creator.

License

CC BY

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