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Production sequence of Si-spheres and interferometrical determination of the sphere volume

Conformity of Length Measuring Machines

Working Group 5.45

Contact persons

  • Dipl.-Ing. (FH) Ingo Lohse
    Head of Working Group
    Certification of length measuring equipments, Standards and regulations for length measuring equipments, DKD-Lead assessor, DKD-assessor of length measuring equipments and gauge blocks, Quality management
    E-Mail: ingo.lohse(at)ptb.de
    Phone: 0531 592-5450


  • Dipl.-Ing. (FH) Olaf Heuer
    Certification of length measuring machines
    E-Mail: olaf.heuer(at)ptb.de
    Phone: 0531 592-5413

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  • Dipl.-Ing. (FH) Rudolf Mascherek
    Certification of length measuring machines
    E-Mail: rudolf.mascherek(at)ptb.de
    Phone: 0531 592-5232

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  • Dipl.-Ing. (FH) Heike Wippich
    Certification of length measuring instruments
    E-Mail: heike.wippich(at)ptb.de
    Phone: 0531 592-5451

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  • Holger Zimmermann
    Certification of length measuring machines
    E-Mail: holger.zimmermann(at)ptb.de
    Phone: 0531 592-5237
  • Dipl.-Ing. Christian Keck 
    Certification of length measuring machines
    E-Mail: Opens window for sending emailchristian.keck(at)ptb.de 
    Phone: 0531 592-5244