Patent ID: 7675001

Claim:
A method for depositing a wipe-proof and rub-proof marking or code marking onto glass or glass receptacles including glass ampoules, syringes, glass bottles, and vials, said method comprising: producing a laser light beam having a wavelength <380 nm engraving the marking into the glass or into the glass surface by deflecting a laser light beam in a first and in a second direction, characterised in that glass receptacles O n are moved along a transport path and in a transport direction, subsequently arbitrarily defined as the x-direction, at least the position of an object O 1 to be individually inscribed is detected or determined at at least one position along the transport path, along the transport path at a writing position W located at a distance to the laser, the laser light beam is triggered in dependence on the position of the glass receptacle, and a two-dimensional marking M a stored in a control unit is written into the surface of the object to be inscribed in that the laser light beam is scanned (rastered) over the surface in the x- and y-direction, and the marking M a written into the surface of the object at least at one position R located after the writing position seen in the transport direction is read, by producing an increased contrast ratio between the inscribed and uninscribed glass surfaces from light introduced into glass walls of the glass receptacle at a distance to the marking and detecting the scattered light, and compared to the two-dimensional marking M a stored in the control unit, wherein with a non-agreement between the written and read marking M a the object is rejected and separated out.