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System technology for dynamic beam shaping
ICALEO 2015: 34th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2015Since the power of continuous wave laser sources have reached one kilowatt, beam shaping is an important topic in the sector of laser material processing. The high intensity allows the increase of process speed, but the extreme local overheating often decreases the quality.
Jan Hauptmann +6 more
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Dynamic generation of plasmonic bottle-beams with controlled shape
Optics Letters, 2014We demonstrate the generation of plasmonic bottle-beams based on self-accelerating surface plasmons. These beams are excited from free-space beams through a special binary phase mask. The mask generates two mirror-imaged self-accelerating surface plasmons, which form the plasmonic bottle-beam and a hot-spot at the point of convergence.
Itai, Epstein, Ady, Arie
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Dynamic holography for extended object beam shaping
SPIE Proceedings, 2013We describe a laboratory experiment to improve the energy-on-target for an extended object. We utilize an iterative approach combining digital holography for detection and SLM beam shaping for object re-illumination. We developed a technique to modify the SLM phase to prevent oversharpening of glints and other high intensity return signal points that ...
Abbie T. Watnik, Paul S. Lebow
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Medical Dosimetry, 1990
Computer control of independent collimator jaw positions and dose is combined with multiple-field summation techniques to design optimized radiation field profiles. Clinically relevant examples are shown for dynamic wedges and compensated mantle fields. Calculation, measurement, and verification techniques are discussed.
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Computer control of independent collimator jaw positions and dose is combined with multiple-field summation techniques to design optimized radiation field profiles. Clinically relevant examples are shown for dynamic wedges and compensated mantle fields. Calculation, measurement, and verification techniques are discussed.
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Temporal color mixing and dynamic beam shaping with silicon metasurfaces
Science, 2019A dynamic metasurface in the mix Metasurfaces have been designed and fabricated to function as many passive optical elements. A time-dependent active element can now be obtained by marrying concepts in microelectromechanics with an array of one-dimensional dielectric nanowires. Although such a static array has been used to select
Aaron L. Holsteen +2 more
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Closed-loop dynamic shape control of a flexible beam
SPIE Proceedings, 1990An experimental implementation of a new distributed parameter shape control design methodology is presented. The technique is based upon the input/output representation of distributed parameter systems in a spatially- and temporallytransformed frequency space.
Shawn E. Burke, James E. Hubbard, Jr.
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Nonlinear Strain Measures, Shape Functions and Beam Elements for Dynamics of Flexible Beams
Multibody System Dynamics, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Dynamic high power laser beam shaping device
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII, 2019The performance achievable in laser material processing depends not only on the optical power of the source but also on the quality (for example in terms of the beam-parameter-product) of the beam incident on the workpiece. Therefore, to optimize the production yield, flexible laser machines must have the possibility to change the beam quality ...
Marta Bassignana +3 more
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Dynamic control of laser beam shape for heat treatment
Journal of Laser Applications, 2018One of the major challenges for laser hardening is dealing with the geometrical singularities of the treated components. The problem arises from the laser hardening of uneven surfaces such as those with sharp edges or holes. In these cases, due to the differences in the surrounding volume of the material, overheating problems often appear leading to ...
Paula Sancho +4 more
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Dynamic beam shaping with coherent beam combining
PhotonicsViewsAbstractCoherent beam combining (CBC) is a method of enhancing laser power. It has recently transitioned to industrial applications, unveiling new possibilities in laser technology. CBC merges multiple laser channels from a single source, controlling their phase to create constructive or destructive interference.
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