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  • JLA Vol:19 Iss:1 (Procedure for the computation of hazards from diffusely scattering surfaces under the Z136.1-2000 American National Standard for Safe Use of Lasers)


    Authors:
    Robert J. Thomas
    Benjamin A. Rockwell
    Air Force Research Laboratory, Brooks AFB, Texas 78235-5128

    Wesley J. Marshall
    USACHPPM, Aberdeen Proving Ground, Maryland 21010-5403

    Robert C. Aldrich
    Mary F. Gorschboth
    Sheldon A. Zimmerman
    Dahlgren Division, Naval Surface Warfare Center, Dahlgren, Virginia 22448-5100

    R. James Rockwell
    Rockwell Laser Industries, Cincinnati, Ohio 45243


    The current national consensus standard for laser safety in the United States is the American National Standard for Safe Use of Lasers (ANSI Z136.1). The most recent standard, Z136.1-2000, incorporates ...

    $25.00

  • JLA Vol:26 Iss:1 (Evolution of nano-ripples on stainless steel irradiated by picosecond laser pulses)


    Authors:
    Bin Liu
    Wenjun Wang
    Gedong Jiang
    Xuesong Mei
    Kedian Wang
    Jiuhong Wang
    Zibao Wang
    State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an 710054, China


    The characteristics of laser-induced periodic surface structures are investigated after laser irradiation with a pulse duration (10 ps) under a certain laser fluence (0.27 J/cm2) and pulse number (N = 50–2000). In the experiments, at the lowest number of pulses, ultrafine ripples are observed with sub-200-nm spatial periods and an orientation parallel to laser polarization ...

    $25.00

  • JLA Vol:24 Iss:4 (Synthesis of hybrid microgels by coupling of laser ablation and polymerization in aqueous medium)


    Authors:
    Philipp Nachev
    Funktionale und Interaktive Polymere, Institut fu¨r Makromolekulare und Technische Chemie, RWTH Aachen University, Forckenbeckstr. 50, D-52074 Aachen, Germany

    Danielle D. van ’T Zand
    Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45141 Essen, Germany

    Vincent Coger
    Department of Plastic, Hand- and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany

    Philipp Wagener
    Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universit...

    $25.00

  • JLA Vol:5 Iss:1 (Intercomparison between a C‐Series Reference Calorimeter and Two Commercially Available Laser Power/Energy Meters)


    Authors:
    Kirsti Leszczynski
    Finnish Centre for Radiation and Nuclear Safety, SF‐00101 Helsinki, Finland

    Robert W. Faaland
    Center for Devices and Radiological Health, Rockville, Maryland 20857


    An intercomparison between a C‐series reference calorimeter and two commercially available laser power/energy meters has been undertaken. The intercomparison has been performed at three visible laser wavelengths (488.0 nm, 514.5 nm, and 632.8 nm) and one near infrared laser wavelength (1064.0 nm). Power and energy levels presented to the instruments ranged from approximately 0.1 mW to 20 W and from 0.9 mJ to 16 J. One of the power/energy meters has a volume ab...

    $25.00

  • JLA Vol:17 Iss:3 (High-speed scanning laser-induced breakdown spectroscopy at 1000 Hz with single pulse evaluation for the detection of inclusions in steel)


    Authors:
    Holger Bette
    Reinhard Noll
    Fraunhofer-Institut fu¨r Lasertechnik (ILT), Steinbachstr. 15, 52074 Aachen, Germany

    Gregor Mu¨ller
    Hans-Werner Jansen
    C¸etin Nazikkol
    Horst Mittelsta¨dt
    ThyssenKrupp Stahl AG, Kaiser-Wilhelm-Str. 100, 47166 Duisburg, Germany


    Spatially resolved information about the distribution and chemical composition of inclusions in steel are gained by scanning methods, such as scanning electron microscopy with energy dispersive X-ray spectroscopy, electron probe microanalysis or capillary-X-ray flourescence. Scanning laser-induced breakdown spectroscopy (LIBS) offers dis...

    $25.00

  • JLA Vol:22 Iss:1 (Finite volume model for laser-soot interaction for a laser transmission welding process)


    Authors:
    L. S. Mayboudi
    A. M. Birk
    G. Zak
    Mechanical and Materials Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada

    P. J. Bates
    Chemistry and Chemical Engineering, Royal Military College, Kingston, Ontario K7K 7B4, Canada


    Laser transmission welding, a technique to join thermoplastic components, involves a laser beam passing through a laser-transmitting part being absorbed by a laser-absorbing part at the weld interface. The heat generated at the interface melts a thin layer of the plastic in both parts and forms a joint. Laser-absorbing agents such as dyes or soot particles are added to the laser-absorbing part to...

    $25.00

  • JLA Vol:1 Iss:3 (Experimental Laser Welding Thermal Cycles)


    Authors:
    E. A. Metzbower
    U.S. Naval Research Laboratory, Code 6324, Washington, DC 20375‐5000, U.S.A.


    $25.00

  • JLA Vol:23 Iss:1 (Tolerances of joint gaps in Nd:YAG laser welded Ti-6Al-4V alloy with the addition of filler wire)


    Authors:
    X. Cao
    Aerospace Manufacturing Technology Centre, Institute for Aerospace Research, National Research Council Canada, 5145 Decelles Ave., Montreal, Quebec H3T 2B2, Canada

    G. Debaecker
    Ecole Centrale de Nantes, 1 Rue de la Noe´, B.P. 92101, 44321 Nantes Cedex 3, France

    E. Poirier
    Aerospace Manufacturing Technology Centre, Institute for Aerospace Research, National Research Council Canada, 5145 Decelles Ave., Montreal, Quebec H3T 2B2, Canada

    S. Marya
    Ecole Centrale de Nantes, 1 Rue de la Noe´, B.P. 92101, 44321 Nantes Cedex 3, France

    J. Cuddy
    A. Birur
    Standard Aero Limited, 33 Allen D...

    $25.00

  • JLA Vol:7 Iss:2 (Understanding laser hazard evaluation)


    Authors:
    Wesley J. Marshall
    U.S. Army Center for Health Promotion and Preventive Medicine (Provisional), Aberdeen Proving Ground, MD 21010‐5422, U.S.A.


    The current 1993 version of the ANSI Z136.1 standard for the safe use of lasers provides maximum permissible exposures which more closely match available biological injury data. Interpreting the standard can be more difficult at times than with previous versions. By keeping the biological injury mechanism in mind, the reasoning behind the multitude of rules contained in the standard are more understandable.

    $25.00

  • JLA Vol:15 Iss:4 (Excimer laser fabrication of polymer microfluidic devices)


    Authors:
    Joohan Kim
    Xianfan Xu
    School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907


    Silicon has been a primary material for fabrication of microelectromechanical systems (microfluidic devices in MEMS) for several decades. This is due to the fact that the MEMS techniques were derived from those used for microfabrication in the semiconductor industry. These techniques are well developed, and can be readily applied for silicon based MEMS fabrication. Nowadays, alternative manufacturing materials and techniques are needed for reducing costs and meeting new requirements. Polymers have many advantages because of their low costs and applications in ...

    $25.00

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