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US 7,804,061 B2Granted
Method and apparatus for machine-reading markings on/in transparent marking substrates
AssigneeBoraident GmbH
InventorsThomas Rainer, Reinhard Borek
Life of this patent
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AssigneeBoraident GmbH
InventorsThomas Rainer, Reinhard Borek
Estimating the term…
The invention relates to a method for the machine-reading of markings on/in transparent, especially pane-type, marking carriers, especially glass panes, according to which the marking carrier (2) is illuminated with UV light at least during the period of a machine-reading process of a marking, especially by means of a reading device (4), in order to increase the contrast between a marking (5) and the marking carrier (2). The invention also relates to a device for the machine-reading of markings in transparent, especially pane-type, marking carriers, especially glass panes, comprising at least one reading device (4) for markings arranged on/in a marking carrier, and at least one illumination device (4) is provided for increasing the contrast between a marking (5) and the surrounding transparent marking carrier (2) by illuminating the marking carrier (2) with UV light.
A method for machine-reading of markings on/in transparent marking carriers or glass panes wherein the markings are created from laser-produced micro cracks or metal particles/metal ions in the volume of the marking carrier and at least during the period of a machine-reading and recognition process by a reading device, the contrast between the marking and the marking carrier is increased by illumination of the marking carrier with UV light that is coupled into the marking carrier via a surface extending essentially perpendicular to a plane in which the marking in or on the marking carrier is located, and thereby exciting into fluorescence the material of the marking carrier surrounding the marking so that the marking does not or only slightly fluoresces and stands out dark against a bright fluorescing background.
A method for machine-reading markings on/in transparent marking carriers or glass panes wherein the markings are created from laser-produced micro cracks or metal particles/metal ions in the volume of the marking carrier and at least during a machine-reading and recognition process by a reading device, the contrast between the marking and the marking carrier is increased by illumination of the marking carrier with UV light that is coupled into the marking carrier via a surface extending essentially parallel to a plane in which the marking on/in the marking carrier is located, the material of the marking carrier spaced from the marking being excited to fluoresce through the UV light so that the surroundings of the marking do not fluoresce and the marking is illuminated in the marking carrier particularly through total reflection of propagating fluorescent light.
A method for machine-reading markings on/in transparent marking carriers or glass panes wherein the markings are created from laser-produced micro cracks or metal particles/metal ions in the volume of the marking carrier and at least during a machine-reading and recognition process by a reading device, the contrast between the marking and the marking carrier is increased by illumination of the marking carrier with UV light that is coupled into the marking carrier via a surface extending essentially parallel to a plane in which the marking on/in the marking carrier is located, the marking being an imperfection in the marking carrier, on which the fluorescent light un-couples from the marking carrier, so that the marking appears bright on a dark background.
Dependencies are inferred from the claim text.