Femtosecond laser marking is a technology that uses ultrashort laser pulses to produce colored oxidation on metal surfaces, including titanium, stainless steel, copper, silver and gold. Different colors can be achieved by controlling the thickness of the oxide layers. The high speed and accuracy of the laser make it possible to selectively color metal parts and engrave tiny QR codes for security and tracing purposes in industries like jewelry, watchmaking, medical device and tool marking. The technology is also useful for anti-counterfeiting measures, as it allows marking even the smallest parts, and imprinting QR codes into transparent materials.
Laser processing precision makes it possible to engrave tiny QR codes on different material surfaces as well as imprinting QR codes into transparent material volume.
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A feasibility study is composed of several steps, including researching methods for fabricating micro-structures, fabricating a micro-structure prototype, measuring and aligning the prototype with technical requirements, and finally preparing a study report.