Abstract: In the method for the authentication of identification marks applied on a packaging foil, the identification marks, present as a barcode, are embossed on-line by an embossing roller device on a packaging foil, are read by means of a suitable apparatus and are compared to a template for the creating of the barcode, wherein the structural elements of the bar code, created by means of the template, are transferred to a set of embossing rollers with male and female rollers associated with one another and are formed on the surface thereof. Preferably, a further code is overlaid on the barcode in a further coding step, and the result is transferred and formed as a template onto the surface of the set of embossing rollers, wherein the template is used for deciphering the read-in, embossed code.

Abstract: A packing foil having optical diffraction effective areas and/or authentication features includes at least a first structure produced by passing a homogeneous intensity distribution spot of a laser beam having laser pulse durations in a nano-second range through a mask and a diaphragm before imaging the laser beam on at least one area of an exposed surface of the packaging foil using imaging optics positioned downstream of the mask and the diaphragm, and at least a second structure superposed on the first structure, the second structure produced by a second laser having pulse durations in the pico- or femtosecond range.

Abstract: In the method for structuring at least one area of a solid body surface provided with a ta-C coating, a mask in the homogenous spot of the optical system is used in order to shape the beam in the mask projection technique and then a diaphragm in front of the imaging optics. A structure is applied by means of an excimer laser having pulse durations in the nanosecond range, a number of mask and diaphragm combinations being arranged in a exchanger device and the exchanger device being adapted to place both one of the masks and one of the diaphragms in the beam path of the laser independently of each other, the masks and diaphragms being arranged in holders while being displaceable linearly or rotatively and rotatable about themselves. This method allows the rational manufacture of very complex, extremely fraud-resistant authentication features and/or of esthetically attractive, optical diffraction effective colored patterns.

Abstract: In the method for producing a set of cooperating embossing rollers, a modelling device is used for parameterizing the embossing rollers, the device comprising a test bench having a pair of rollers which are put under hydraulic pressure that can be measured and set, in order to determine from the measurement data the parameters for producing the embossing rollers. The use of a modelling device for obtaining the parameters for producing a set of embossing rollers makes it possible to use a very large variety of embossing patterns and foils with diverse properties as a basis and, by conducting tests on this very test bench, be able to efficiently narrow down and predetermine the properties of a final embossing device, preferably operated without hydraulics.

Abstract: The method for structuring the surface of a steel embossing roller by means of short pulse laser, where the structuring is a macrostructuring with dimensions of over 20 ?m and depths up to 150 ?m and more, distinguishes itself by the following parameter combination: a) in single pulse operation a fluence in the range of 0.5 J/cm2 to 3.5 J/cm2 and in burst operation a mean burst fluence of 0.5 J/cm2 to 70 J/cm2 per pulse, b) wavelength of 532 nm to 1064 nm, c) repetition rate of 1 kHz to 10 MHz, d) pulse to pulse spacing on the workpiece of 10% to 50% of the beam diameter for the femtosecond laser and of 10-25% and 40-50% of the beam width for the picosecond laser, e) laser pulse position near the workpiece surface, and f) deflection velocities of up to 100 m/s and more. ***Such a method allow manufacturing a complete embossing roller with teeth and gaps for producing logos, the teeth having variable heights, shapes, and spacings, for embossing e.g. innerliners for cigarette packaging.

Abstract: In the method for producing masks and/or diaphragms for a laser installation for the creation of microstructures on a solid body surface according to the mask projection technique, predetermined opaque surface portions which scatter the laser radiation are produced in the mask and/or diaphragm substrate by roughening and modifying the latter by means of a femtosecond, picosecond or fluor laser beam. Such masks and diaphragms have a strongly improved lifetime and accuracy and may e.g. serve for the creation of blazed gratings which, arranged in diffraction grating arrays on a solid body surface, serve for producing spectral colors and mixed colors of high brilliance.

Abstract: In the method for structuring at least one area of a solid body surface provided with a ta-C coating, by means of a first laser, preferably an excimer laser having pulse durations in the nanosecond range, a first structure is produced upon which a second, ripple-like structure is superposed by means of a second laser, preferably having pulse durations in the femtosecond range. Preferentially, the excimer laser structuring is carried out according to the mask projection technique and the femtosecond laser structuring according to the focus technique. This method allows the rational manufacture of very complex, extremely fraud-resistant authentication features and/or of esthetically attractive, optical diffraction effective colored patterns.

Abstract: In the method for structuring at least one area of a solid body surface provided with a ta-C coating, a mask in the homogenous spot of the optical system is used in order to shape the beam in the mask projection technique and then a diaphragm in front of the imaging optics. A structure is applied by means of an excimer laser having pulse durations in the nanosecond range, a number of mask and diaphragm combinations being arranged in a exchanger device and the exchanger device being adapted to place both one of the masks and one of the diaphragms in the beam path of the laser independently of each other, the masks and diaphragms being arranged in holders while being displaceable linearly or rotatively and rotatable about themselves. This method allows the rational manufacture of very complex, extremely fraud-resistant authentication features and/or of esthetically attractive, optical diffraction effective colored patterns.

Abstract: Method and apparatus for automatically controlling aerial photographic cameras. An exact and reliable control device of low electronic and optical cost, which unburdens the operator, is realized by means of two photoreceiver lines positioned parallel to each other and perpendicular to the flight direction. At least the first line is connected to a data memory, which as well as the second line is connected to a correlator. The correlator is connected, via units for calculating the vg/hg ratio and/or the drift, to setting mechanisms of the aerial camera. A third photoreceiver line can also be provided, coupled subsequently to a data memory. The invention is utilizable in photogrammetry.