focused laser beam scanning
Effects of Laser Hardening Process Parameters on Case Depth of 4340 Steel Cylindrical Specimen—A Statistical Analysis
... researchers focused their efforts on modeling algorithms and strategies using theory ...sport laser, the heat transfer and some other metallurgical ...the beam power, the scanning speed and ...
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Robust, spatially scanning, open-path TDLAS hygrometer using retro-reflective foils for fast tomographic 2-D water vapor concentration field measurements
... and focused onto a 1 mm diameter, uncooled indium gallium arsenide (InGaAs) detector by the off-axis parabolic ...the beam is scanned horizontally across the measurement ...the laser beams cover more ...
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A simple but precise method for quantitative measurement of the quality of the laser focus in a scanning optical microscope
... periodic gold nanostructure was used as a knife edge that was scanned across the laser beam to give detailed measurements of highly focused beam radii. However, this method required ...
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A Sensitivity Study of 4340 Steel Hardness Profile Heat- Treated by Laser
... applications, laser hardening is a highly efficient process, because it is able to improve the hardness field, wear resistance, fatigue life and the surface tribology conditions of mechanical components, while ...
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A Floating Probe Force Microscope With Sub-Femtonewton Resolution
... Fill a sample chamber with water and polystyrene beads and place on the prism, careful to use enough index-matching fluid to optically join the two glass surfaces. Lower the water-immersion objective until the sample is ...
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Effect Of Number Of Laser Scans On The Corrosion Behavior Of Laser Formed Titanium Alloy
... parameters; laser power (800 W), beam diameter (12 mm) and scanning speed ...The laser formed samples were characterised through the microstructure, hardness and the corrosion ...the ...
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Particle Focusing in Microchannel with Multi-Parallel Channels or Porous Orifice
... Particle focusing into a narrow stream in a microchannel is an important step in flow cytometry system (i.e. flow cytometer) to be used in both biomedical research and clinical diagnostics [1-3]. In the flow cytometer, ...
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Fabrication of Vacuum Chamber and Synthesis of Nanotubes. A Theorical Investigation of Exciton-Photon Interaction in the Nanotubes
... or laser vaporization of graphite have less structural defects camparing to other methods due to the high process ...the laser is used to heat the substrate surface, this method is called LCVD ...
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Optimization of Laser Beam Machining (LBM) Parameters of Acrylic Board Using Artificial Neural network (ANN) and Gray Relational Analysis (GRA)
... as laser power, machining rate, assistive gas preeesure, nozzle stand-off distance, work piece thickness, focal length, pulse frequency, pulse width and many more have been optimized ...
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The larynx ruler to measure height and profile of vocal folds: a proof of concept
... Determination of the exact 3D position of the VF before and after treatment could help to answer the above-mentioned question. Three-dimensional computed tomography (CT) imaging has shown its value in tackling this ...
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Apparent beam size definition of focused ion beams based on scanning electron microscopy images of nanodots
... the beam ions and recoiled atoms backscatter through the sample surface into the vac- uum ...the beam, which causes damage to the surface is larger than the physi- cal size of the beam, and here it ...
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A new mobile and portable scanning lidar for profiling the lower troposphere
... Our scanning lidar is designed in the coaxial mode to re- duce the overlap height (∼ 260 m) between transmitter and ...the laser transmission. The laser source is kept fixed, but the beam of ...
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ELECTRON LASER ACCELERATION: IS THE GAUSSIAN BEAM DESCRIPTION ADEQUATE?
... of laser acceleration schemes by working fully ...the laser beam ideally as plane waves and solving the fully relativistic Newton-Lorentz equations of motion, ...
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II. METHODS A. Sample Preparation
... properties. Focused Ion Beam – Scanning Electron Microscope (FIB-SEM) serial sectioning has been successfully applied in order to visualize the way in which individual flax fibres are assembled into ...
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Polarized recombination of acoustically transported carriers in GaAs nanowires
... nanowire by a focused light spot are acoustically transferred to a second location where they recombine. We show that the recombination of the transported carriers occurs in a zinc blende section on top of the ...
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Scanning laser source and scanning laser detection techniques for different surface crack geometries
... generation laser passing over the defect (SLLS), we observe enhancement due to constructive interference of the direct and reflected Rayleigh ...detection laser scanning over a defect (SLD) the ...
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Erkennungsgte und Kosteneffektivitt von Screeningverfahren zur Erfassung von primren Offenwinkelglaukomen Validity and cost-effectiveness of methods for screening of primary open angle glaucoma
... Die 55 medizinischen Volltexte behandeln am häufigsten die Frequenz- verdopplungstechnik, die konfokale Scanning-Laser-Tomographie und die Scanning-Laser-Polarimetrie. Für die ...
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Monitoring forests in space and time using close-range sensing
... White, J.C., Saarinen, N., Kankare, V., Wulder, M.A., Hermosilla, T., Coops, N.C., Pickell, P.D., Holopainen, M., Hyyppä, J. and Vastaranta, M., 2018. Confirmation of post-harvest spectral recovery from Landsat time ...
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Determination of heat flux intensity distribution and laser absorption rate of AlSl D2 tool steel
... Where: K : Constant P : Laser power A : Absorption rate r : Efficient beam radius X,Y : Distance from laser beam center In this study, the laser beam diameter size and distribution were [r] ...
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ANN Laser Hardening Quality Modeling Using Geometrical and Punctual Characterizing Approaches
... the laser hardening process on 4340 steel during which the parameters of laser power, beam scanning speed, initial hardness and surface roughness were considered and for which the testing ...
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