Geodimeter

The Geodimeter (acronym of geodetic distance meter) was the first optical electronic distance meter surveying instrument.[1][2] It was originally developed for measuring the speed of light.[3][4] It was invented in the 1940s by Erik Osten Bergstrand and commercialized in 1953 by the AGA (Aktiebolaget Gasaccumulator) company of Sweden.[5]

See also

References
  1. Rüeger, J.M. (2012). Electronic Distance Measurement: An Introduction. Springer Berlin Heidelberg. p. 15. ISBN 978-3-642-80233-1. Retrieved 2020-09-24.
  2. Bergstrand, Erik (2008). "Distance measuring by means of modulated light". Bulletin Géodésique. 24 (1): 243–249. doi:10.1007/BF02526937. ISSN 0007-4632. S2CID 121587208.
  3. Froome, K.D.; Essen, L. (1969). The Velocity of Light and Radio Waves. Academic Press. Retrieved 2020-09-24.
  4. Bergstrand, Erik (1950). "Velocity of Light". Nature. Springer Science and Business Media LLC. 165 (4193): 405. doi:10.1038/165405a0. ISSN 0028-0836. S2CID 4281189.
  5. "AGA Geodimeter". AGA Museum. 2014-10-03. Retrieved 2020-09-24.

Further reading
  • J.R. Smith (1998), The History of Geodimeter®, Spectra Precision, Printed in Sweden 07-98 Publ. No. 571 710 000.
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