Tasks

• Precision Interferometer


• High accuracy determination of thermal expansion coefficients and compressibility


• Investigation of the homogeneity of thermal expansion


• Investigation of length relaxation and long term stability


• Gas-Refractometry


• High accuracy determination of the air refractive index as a
  function of environmental parameters using refractometer cells


• Ultra high determination of air constituents using the "length refractometer"




• Further development of gauge block comparators


• Example: conversion of the PTB Kösters-Comparator to phase stepping interferometry

---

Head of Working Group:		Dr. René Schödel Phone: 0531 592-5440 Fax: 0531 592-695440 E-Mail: rene.schoedel@ptb.de
Address		Physikalisch-Technische Bundesanstalt Working Group 5.44 Bundesallee 100 D-38116 Braunschweig

---

© Physikalisch-Technische Bundesanstalt Page created: 26-Sep-2006, last update: 03-Apr-2008 10:10 AM, K. Eggert