A new method for the measurement of distances up to 5000 ft by means of a modulated light beam
- 1 March 1966
- journal article
- Published by IOP Publishing in Journal of Scientific Instruments
- Vol. 43 (3) , 129-133
- https://doi.org/10.1088/0950-7671/43/3/301
Abstract
The paper describes a new method of measuring long distances by means of a light ray polarization-modulated at ultra-high frequencies. The modulation wavelength is determined by reference to cavity resonators, used in such a manner that no atmospheric refractive index correction has to be applied. This leads to a very simple method of obtaining the required distance directly in feet. The theory of the method is given in detail, including the effect of altitude on the measurement. The apparatus itself is also described together with some preliminary results which illustrate the accuracy that can be achieved.Keywords
This publication has 3 references indexed in Scilit:
- Distance measurement by means of a light ray modulated at a microwave frequencyJournal of Scientific Instruments, 1961
- The Refractive Indices and Dielectric Constants of Air and its Principal Constituents at 24,000 Mc/sProceedings of the Physical Society. Section B, 1951
- The Dispersion of Air Between 2500A and 6500AJournal of the Optical Society of America, 1951