Russian scientists have proposed to strengthen the protection of banknotes and plastic cards by using a new method of creating holograms. This was reported by the press service of Moscow State University.
The illusion of volume can be given by converting a picture into an analog hologram. They look different when viewed from different angles and are used to verify the authenticity of important papers or products due to the relative complexity of such designs. The method, developed at Moscow State University, makes it possible to create flat optical elements that, when illuminated with white light, create a 3D object that can be seen both when tilted and rotated 360 degrees.
“The methods developed for creating micro-relief are designed to protect banknotes, passports and plastic cards against counterfeiting. “The computational technology and subsequent synthesis of nano-optical elements ensure reliable preservation of the developed elements, as science is intensive and not widely used.”
To achieve the desired result, it was necessary to correctly calculate the microrelief profile, taking into account the many variables on which the “volume” of the image depends.
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