Abstract: In a method for forming printing indicia to accept printing ink on a processing surface of a printing form associated with a printing cylinder, a first engraving tool is provided directed onto the processing surface of the printing form which creates a fine processing track. A second engraving tool is also directed onto the same processing surface which creates a coarse processing track.

Abstract: In a method for engraving of line patterns or text by use of processed tracks which accept printing ink on a processing surface of a printing form, a printing screen is provided with screen elements for the processing surface. With at least one engraving tool, the line patterns or text are engraved at the processing surface which are independent of the printing screen with a plurality of engraving tool tracks for each screen element of the screen used for the line patterns or text by engraving a plurality of said processed tracks forming lines in the screen elements to form the line patterns or text. Supporting locations are provided for a doctor blade.

Abstract: In a method for forming printing indicia to accept printing ink on a processing surface of a printing form associated with a printing cylinder, a first engraving tool is provided directed onto the processing surface of the printing form which creates a fine processing track. A second engraving tool is also directed onto the same processing surface which creates a coarse processing track.

Abstract: In a method for forming printing indicia to accept printing ink on a processing surface of a printing form associated with a printing cylinder, at least first and second laser beams are provided directed onto the processing surface wherein processing points of the first and second laser beams combine to form a processing spot used in the creation of the printing indicia. A size and shape of the processing spot is defined with the first and second laser beams.

Abstract: In a system or method for forming ink holding indicia at a processing surface of a printing form associated with a printing cylinder, a laser beam source is provided creating a laser beam. A rotatable mount rotates the cylinder. A modulator modulates the laser beam to control engraving of the ink holding indicia at the processing surface. Focusing optics focuses the laser beam to create a processing spot on the processing surface. Between the focusing optics and the processing surface a base member having an inner cavity through which said laser beam passes on its way to said processing surface, and at least one extraction channel which extracts unwanted material from said cavity.

Abstract: In a method or system for forming ink holding indicia at a processing surface of a printing form associated with a printing cylinder, a laser beam is provided. The laser beam is modulated to control whether or not at least a portion of the laser beam strikes the processing surface. A focusing optics focuses the laser beam to create a processing spot on the processing surface to create the ink holding indicia. At least a portion of the laser beam not intended to reach the processing surface is directed to a sump. A cover is provided over the sump substantially preventing radiation of the laser beam away from the sump. Alternatively, the processing surface may serve as the sump.

Abstract: In a method for engraving of a rotogravure cup to accept printing ink in a processing surface of a rotogravure print cylinder, a cup is formed with at least one engraving tool from a plurality of engraved small cups and wherein a depth of at least one of the small cups differs from the depth of at least one other small cup within the cup.

Abstract: A pump fiber is stripped of its cladding over the last section. This can occur by etching a coating off. The sheath is preferably etched off wedge-shaped. As a result thereof, the remaining pump power is eliminated into the environment. How much stray pump light still proceeds via the fiber core to the fiber exit can be monitored over a length of the fiber completely stripped of the protective sheath.

Abstract: A system and method for selectively process material on a processing surface of a printing form to create a fine structure or pattern for images or text. At least one fiber laser comprising a pump source and a laser fiber is provided. A laser gun is mounted adjacent the printing form and has at least a focusing optics. The fiber laser outputs a laser beam which is diffraction-limited to permit the focusing optics to focus the laser beam onto the processing surface of the printing form as a spot having a spot size sufficiently small to process the processing surface to create the fine structure or pattern images or text.

Abstract: In a method and system for processing a processing surface of a material, a mounting receives the material with the processing surface. At least one fiber laser comprising a pump source and a laser fiber has an infeed end, an outfeed end, and a core surrounded by a pump core, the pump source being positioned at the infeed end, and the laser fiber outputting a continuous wave laser beam at the outfeed end. At least one of the laser beam and the processing surface are laterally movable with respect to each other. A focusing optics is provided through which the laser beam passes. The laser beam output from the laser fiber is diffraction-limited to permit the focusing optics to focus the laser beam onto the processing surface as a spot having a spot size sufficiently small to create a fine structure by processing material at the processing surface.

Abstract: In a solid laser with one or several pump light sources whose radiation is fed into a laser crystal with a high light density, a laser crystal and an optical resonator are provided. Each pump light source is formed of several laser diodes. The light from the laser diodes of each pump light source is in-coupled by means of a single optical waveguide.

Abstract: In a method and an apparatus for driving a diode-pumped solid-state laser, the light power emitted by the solid-state laser (1) is determined as a measurement signal, using a measurement apparatus. By comparison of the measurement signal with a predetermined light power target value, a control deviation is determined in a control amplifier the deviation being converted in a generator into a driver current for a laser diode used as a pump diode for the resonator of the solid-state laser. For the damping of high-frequency disturbances of the light power, in a high-bandwidth negative feedback branch the high-frequency components of the measurement signal are filtered out by means of a high-pass filter and are supplied to a fast control amplifier. In a control element connected in parallel to the laser diode, a portion of the driver current supplied to the laser diode is controlled dependent on the high-frequency components of the measurement signal.

Abstract: The invention relates to a recording arrangement for image information in the production of printing forms. The laser light modulated with the image content is conducted through a multimode light waveguide into a recording element. There, the modulated laser light illuminates a diaphragm which is imaged onto a light-sensitive recording medium as an exposure point. A multimode light waveguide has the disadvantage that the light distribution at its exit surface is non-uniform due to the modes being formed in the light waveguide. Thus, the diaphragm is likewise non-uniformly illuminated and the exposure point exhibits an inhomogeneous light distribution, whereby the exposure on the recording medium is streaky. What is proposed is to dispose a scatter disk (6) and an additional focusing lens (13) between the exit surface (2) of the light waveguide (1) and the diaphragm (17) and to accordingly dimension the optical spacings.

Abstract: A method of avoiding unwanted line structures in the electronic reproduction of images by means of a monochromatic light source in whose beam path an acousto-optic modulator (AOM) cell is arranged. One line consists of a multiple line made up of a plurality of sub-lines. The acousto-optic modulator (AOM) cell is driven by a mixture of ultrasonic waves of discrete frequencies, by which means the beam is split up into a plurality of sub-beams each associated with a discrete frequency which together determines the line width. The individual frequencies are so calculated that the sub-beams overlap and so that the amplitudes of the frequencies produce a uniform intensity distribution in a line.

Abstract: A circuit for digitally controlling the brightness of the electron beam of an electron beam deflection tube. The circuit permits switching at a very fast rate on the order of 200 nanoseconds. To this end, a differential amplifier is used having an input and an output transistor which may be of opposite conductivity type. The circuit may be protected from saturation state by a diode and from fluctuation in temperature by a further diode and a variable capacitor may be employed for effectively neutralizing the interelectrode capacitance of the electron beam tube.