Laser marking system

A laser marking system for marking an object, comprising:

• a laser source configured to generate a laser beam;
• an optical system, comprising:
• a first optical element configured to receive the laser beam,
• wherein the laser source and the optical system are configured to have the laser beam illuminate a predetermined illumination area of the first optical element,
• wherein the first optical element is shaped to introduce spherical aberrations in the received laser beam, resulting in an intermediate beam produced by the first optical element;
• a second optical element arranged at a predetermined distance from the first optical element and configured to receive the intermediate beam,
• wherein the second optical element is shaped to introduce further spherical aberrations in the received intermediate beam, resulting in the generation of an essentially non-diffractive beam,
• wherein the essentially non-diffractive beam converges along an optical axis of the non-diffractive beam to produce a central focus volume extending over a working range along the optical axis, in which at any position along the optical axis, within the working range, the central focus volume contains at least half of a total power of the non-diffractive beam;
• and
• a targeting system configured to apply a marking on a target surface of the object by positioning the target surface of the object in the central focus volume of the essentially non-diffractive beam.