Applied Scientific Research, Section B

, Volume 4, Issue 1, pp 434–446 | Cite as

An optical dilatometer

  • J. Terpstra


An instrument is described which enables displacements of 2 x 10-6cm to be determined by means of interference phenomena of monochromatic light. The measuring pin is pushed against the specimen with a force of 4000 dynes. The instrument setting remains stable for a period of several hours.


Reflection Coefficient Light Beam Ring System Coal Sample Silver Coating 
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  1. 1).
    Waard, P. de, T.N.O. Nieuws9 (1954) 128.Google Scholar
  2. 2).
    Tolansky, S., Multiple-beam interferometry, Clarendon Press, Oxford 1948.Google Scholar

Copyright information

© Martinus Nijhoff 1955

Authors and Affiliations

  • J. Terpstra
    • 1
  1. 1.Centraal LaboratoriumStaatsmijnen in LimburgGeleen

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