Accepted for publication in the Journal of Technical Physics in 2017, an article Determination of subpixel microspaces of the speckle structure by the method of phase shift of the spatial spectrum field” by the head of the laboratory of problems of coherent-optical measurements in precision mechanics, professor, Doctor of Physical and Mathematical Sciences. V.P. Ryabukho, laboratory staff: Candidate of Physical and Mathematical Sciences N.Yu. Mysina, Candidate of Physical and Mathematical Sciences L.A. Maximova and gpostraduate student P.V. Ryabukho “.
The method of measuring the subpixel microspaces of the speckle structure based on the determination of the parameters of the linear phase shift formed in the field of the complex spatial spectrum is proposed and experimentally implemented. The method makes it possible to expand the range of measurements made with the digital speckle-photography method for the case when the period of interference fringes formed in the total spatial spectrum of the spectograms turns out to be much larger than the spectral width.