Английская Википедия:Geodimeter
The Geodimeter (acronym of geodetic distance meter) was the first optical electronic distance meter surveying instrument.Шаблон:SfnШаблон:Sfn It was originally developed for measuring the speed of light.Шаблон:SfnШаблон:Sfn It was invented in 1947 by Шаблон:Ill and commercialized in 1953 by the AGA (Aktiebolaget Gasaccumulator) company of Sweden.Шаблон:Sfn[1] It was used in the Transcontinental Traverse.
The Geodimeter business was acquired by SpectraPrecision which was acquired by Trimble Inc.Шаблон:Cn
Electronic mechanism
The mechanism uses a Kerr cell in an optical train that chops a collimated beam of light under the control of a precision electronic oscillator in the megahertz range.Шаблон:Sfn It is similar in principle to the mechanical chopper in Fizeau's measurement of the speed of light in air that used a toothed wheel.[2]
See also
References
Sources
- Шаблон:Cite journal
- Шаблон:Cite journal
- Шаблон:Cite book
- Шаблон:Citation
- Шаблон:Cite book
- Шаблон:Cite book
Further reading
External links
- AGA Geodimeter Model 6 (Going the Distance: A Photo Collection Illustrating the History of Distance Measurement Tools at the National Geodetic Survey)
Шаблон:Measurement-stub
Шаблон:Geodesy-stub
