<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>This paper describes the principle of precise length measurements using multi-wavelength interferometry. Three different examples are given in order to demonstrate PTB's ability in this field: 1) Measurements of absolute distances up to 10 m performed by combination of the variable wavelength interferometry with fixed wavelength interferometry using two wavelengths simultaneously, 2) a three-wavelength diode laser interferometer for precision measurements of surface profiles (&lt; 100 μm) and 3) PTB's Precision Interferometer for length measurements of prismatic bodies, e.g. gauge blocks, using three wavelengths. The setup and principle of measurements and some results are presented and discussed in each case.</p></abstract>

This paper describes the principle of precise length measurements using multi-wavelength interferometry. Three different examples are given in order to demonstrate PTB's ability in this field: 1) Measurements of absolute distances up to 10 m performed by combination of the variable wavelength interferometry with fixed wavelength interferometry using two wavelengths simultaneously, 2) a three-wavelength diode laser interferometer for precision measurements of surface profiles (< 100 μm) and 3) PTB's Precision Interferometer for length measurements of prismatic bodies, e.g. gauge blocks, using three wavelengths. The setup and principle of measurements and some results are presented and discussed in each case.

Multi-Wavelength Interferometry for Length Measurements Using Diode Lasers

Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig, Germany

Measurement Science Review

{"article-title":"Multi-Wavelength Interferometry for Length Measurements Using Diode Lasers"}

This paper describes the principle of precise length measurements using multi-wavelength interferometry. Three different examples are given in order to...

Multi-Wavelength Interferometry for Length Measurements Using Diode Lasers

Published Online: Apr 20, 2009

Page range: 16 - 26

DOI: https://doi.org/10.2478/v10048-009-0001-y

Keywords
interferometry, diode laser, length measurement, long distance, surface profile, gauge blocks

This content is open access.

Multi-Wavelength Interferometry for Length Measurements Using Diode Lasers

Published Online: Apr 20, 2009

Page range: 16 - 26

DOI: https://doi.org/10.2478/v10048-009-0001-y

Keywordsinterferometry, diode laser, length measurement, long distance, surface profile, gauge blocks

This content is open access.

Keywords
interferometry, diode laser, length measurement, long distance, surface profile, gauge blocks