METHOD FOR MEASURING SPATIAL COHERENCE RADIUS OF LOCATION OPTICAL SIGNALS Russian patent published in 2019 - IPC G01J9/02 

FIELD: optics.

SUBSTANCE: invention relates to the field of optoelectronic equipment and a method of measuring the spatial coherence radius of local optical signals. Method includes irradiation of a reflection object with coherent optical radiation, detection of a reference photodetector reflected from the object and mixed reference and reflected radiation, each photosensitive element of which has a coordinate reference. From total photocurrent of each photosensitive element variable component is selected, calculating the maximum value of the variable component of the photocurrent of each photosensitive element and calculating the value of phase mismatch between parts of the mixed optical radiation incident on each photosensitive element. Coordinates of photosensitive elements with constant values of phase mismatches are used to determine coordinates of the boundary of the region of absence of interference of intermixed optical radiations, from the values of which the value of the radius of spatial coherence of the optical radiation reflected from the object is calculated.

EFFECT: increase in the measurements accuracy.

1 cl, 2 dwg