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- W2011052357 abstract "A new architecture with two phases-only diffractive elements and one decryption mask for optical control access system is presented. Only three different persons which keep this element have the permission to access together. The Iterative Fourier Transform Algorithm (IFTA) is analyzed for phase-only diffractive optical elements (PODE) design with different constraints in the input and output plane and the optimal variant is chosen for better image quality in the output plane (big value for diffraction efficiency and small value for merit function and signal to noise ratio). For higher security we propose different incident waves. That are compared with the case when the first phase-only diffractive element and decryption masks are designed together in an extended iteration and the output images of them (first desired image) is taken over the second phase-only diffractive element. In order to increase security level, this finally PODE are designed to increase some parts from the first desired image. Only with this condition the key image on the detector is formed." @default.
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- W2011052357 date "2007-08-06" @default.
- W2011052357 modified "2023-10-16" @default.
- W2011052357 title "<title>Iterative algorithm analysis for phase-only diffractive control access system</title>" @default.
- W2011052357 doi "https://doi.org/10.1117/12.757874" @default.
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