18 November 2008 Synthetized holography with resolution 500.000 dpi, holographic dust, computer read holograms, and nanogravure
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Proceedings Volume 7138, Photonics, Devices, and Systems IV; 71381D (2008) https://doi.org/10.1117/12.818029
Event: Photonics, Devices, and Systems IV, 2008, Prague, Czech Republic
Abstract
Our paper deals with the survey of currently exploited electron-beam technologies to produce several protective optical elements. The computer-synthesized security elements are recorded with a resolution reaching 500.000 dpi and are specially developed for the security of the most important state valuables and documents. We shall mention some principal features, where the ultra-precise recording of diffractive elements is exploited.
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Libor Kotacka, "Synthetized holography with resolution 500.000 dpi, holographic dust, computer read holograms, and nanogravure", Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71381D (18 November 2008); doi: 10.1117/12.818029; https://doi.org/10.1117/12.818029
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