Interferometric distance measurement method

Details Interferometric distance measurement method Interferometric distance measurement method

1980-05-22

1982-10-26

Corbin, John K.

Optics: measuring and testing

By particle light scattering

With photocell detection

356358, G01B 902

Patent

active

043558992

ABSTRACT:
An interferometric distance measurement method which utilizes a sequence of at least two closely spaced optical wavelengths in order to achieve ambiguity resolution during the measurement procedure. In so doing, this method performs the equivalent of measuring distances at a relatively long wavelength by measuring the phase difference at two closely spaced optical wavelengths and computing the effective phase measurement at a wavelength which corresponds to the frequency difference between the two optical wavelengths measured.

REFERENCES:
patent: 3171881 (1965-03-01), Morokama
patent: 3398287 (1968-08-01), Krogstad et al.
patent: 3523735 (1970-08-01), Taylor
patent: 3572935 (1971-03-01), Howell et al.
Pamphlet entitled "Geodolite, Laser Distance-Measuring Instrument", Spectra-Physics, Inc.
Pamphlet entitled "Civil Engineering/Surveying Equipment, General Information", Hewlett-Packard.
Pamphlet entitled "AGA Model 6 Geodimeter", AGA Corp.
Pamphlet entitled "AGA Geodimeter, Model 4D", AGA Corp.

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