Laser Marking

Laser marking is everywhere, from the letters on computer keyboards to the sell-by date on corn flakes packets.

The principle of high speed, precise laser marking is beam deflection by a pair of orthogonal galvanometer-driven mirrors and then focusing via a flatfield lens:

Laser marking source with galvo head

A modern Rofin laser shown with marking galvo head

Laser marking

Galvanometer principle of laser marking

Of critical importance for optimal marking is laser selection; Rofin offers virtually all available marking laser types:

  • Q-switched solid state lasers (Nd:YAG and Vanadate)
  • Frequency doubled (532nm) and tripled (355nm) solid state lasers
  • Fibre lasers
  • CO2 lasers

Application Examples

ID and Smart Card Marking

Laser marked ID card

Photo-quality laser marked ID cards

Driving licenses and ID cards can be created from plastic blanks using digital images and data. Rofin markers can create fine resolution grey scale photographs and incorporate counterfeit-resistant techniques.

Laser Label marking

Laser marked label - auto industry

Permanent labels produced by laser

Many car components, along with labels for tyre pressure and fuel (below) need to be weather resistant and tamper-evident. The answer is to use special laminated labels designed to be laser marked; they can also be cut to any desired shape with the same laser.

Sell-by Date Coding

Laser marking on packaging

Sell-by codes marked at high speed with Rofin laser coders

Tracking of batches and origins of food, drink and other household items is essential and unique codes and sell-by dates are increasingly marked directly onto packaging by laser. Rofin’s lasers are able to mark packages at highest throughputs, coding moving cartons or cans whilst they fly by at several metres per second.

New EasyMark Desktop Laser Marker on Vimeo.

For more information on a wide range of marking applications see dedicated industry sections under Markets.

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