METHOD OF REPRODUCING A UNIT OF LENGTH IN LASER RANGE FINDERS BASED ON A MICHELSON INTERFEROMETER Russian patent published in 2019 - IPC G01S17/48 

FIELD: measurement technology.

SUBSTANCE: invention relates to measurement of large distances, including using sources of coherent laser radiation, and can be used for accurate measurement of distance in accurate machine building, as well as for calibration and calibration of high-precision measurement devices. Laser radiation is directed through a collimator to a non-equable interferometer of Michelson type with a long measuring and reference short arm. Radiation source used can be a double-mode or femtosecond laser. Spatial period of interference is set, respectively, by the intermode frequency of the double-mode laser, or by the pulse repetition frequency of the femtosecond laser. In the reference arm of the interferometer, a modulation device (modulator) is installed, which scans a certain area of the signal of interfering beams by varying the difference in the path of the waves of the interferometer.

EFFECT: technical result consists in developing a method of reproducing a unit of length when developing standards of long lengths.

1 cl, 2 dwg