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8 November 2018 Transparent computer generated Fourier holograms for optical display and sighting system
Michael S. Kovalev, Sergey B. Odinokov, Alexander Yu. Betin, Catherine A. Drozdova, Nikita G. Stsepuro
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Proceedings Volume 10818, Holography, Diffractive Optics, and Applications VIII; 108180P (2018) https://doi.org/10.1117/12.2501161
Event: SPIE/COS Photonics Asia, 2018, Beijing, China
Abstract
In this paper, we used an algorithm for the synthesis of binary computer generated holograms Fourier, applying pseudo-random phase masks to increase the intensity of high-frequency components of holograms. A feature of such a computer generated hologram is that the generated symbolic information is an axis-symmetrical picture, which is determined by the mathematical description of the Fourier transformation. The holograms are recorded in a collimated beam with the help of a spatial light modulator in a projection mode. The hologram is recorded with a decrease in linear dimensions to reduce the distortions introduced by spatial light modulator. The progress of computer-synthesized holograms has fallen on the progress of computer technology. In this article, the key issue is the photochemical procedure of processing holograms after their exposure. This processing allows to increase the transmittance of the hologram up to 96%, which enables to install computer generated holograms directly in the field of view of a person. A positive effect of the photochemical treatment process is also an increase in the overall diffraction efficiency of the hologram and redistribution of the intensity from the central point (radiation that did not diffract on the structure and passed through the hologram) to the image that was formed as a result of diffraction of radiation.
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Michael S. Kovalev, Sergey B. Odinokov, Alexander Yu. Betin, Catherine A. Drozdova, and Nikita G. Stsepuro "Transparent computer generated Fourier holograms for optical display and sighting system ", Proc. SPIE 10818, Holography, Diffractive Optics, and Applications VIII, 108180P (8 November 2018); https://doi.org/10.1117/12.2501161
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