METHOD OF MAKING HOLOGRAPHIC IMAGES OF DRAWING Russian patent published in 2014 - IPC G03H1/10 

FIELD: physics, optics.

SUBSTANCE: disclosed is a method of making holographic images of a drawing. The method involves converting the image of the drawing into digital raster; recording information on amplitude and phase characterising each raster point as an extended or point radiator; calculating the parameters of the recording radiation beam, for which elements of the digital raster of the image of the drawing are converted to digital raster of the future hologram; calculating the diffraction pattern at each point of the future hologram formed from the whole set of radiators; calculating the interference pattern resulting from interaction of the design diffraction pattern with the design wave front from a virtual reference point or extended radiation source, identical to the inverted real wave front of the source which will be used when forming the holographic image of the drawing. The obtained result is used as a modulation signal for the radiation beam used to form the diffraction structure of the hologram on a carrier, and a hologram is formed. The carrier is scanned line-by-line with a radiation beam which is modulated on intensity, at its diameter and intensity distribution inside the recording spot.

EFFECT: reduced deviation of the shape of the drawing from a given shape, high resolution and reliability of recording a temporary list of defects.

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