Mr. Dmitriy Yu Molodtsov Profile

Dmitriy Yu Molodtsov

at National Research Nuclear University MEPhI

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Publications (6)

Proceedings Article | 14 December 2016 Paper

Object recognition in non-coherent optical correlator based on DMD-modulator

D. Yu Molodtsov, V. Rodin

Proceedings Volume 10176, 101761A (2016) https://doi.org/10.1117/12.2268159

KEYWORDS: Optical correlators, Object recognition, Digital micromirror devices

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Proceedings Article | 27 April 2016 Paper

Experimental evaluation of the optical quality of DMD SLM for its application as Fourier holograms displaying device

D. Molodtsov, P. Cheremkhin, V. Krasnov, V. Rodin

Proceedings Volume 9889, 988926 (2016) https://doi.org/10.1117/12.2229584

KEYWORDS: Spatial light modulators, Micromirrors, Spatial light modulators, Holograms, Digital micromirror devices, Optical correlators, 3D image reconstruction, Holography, Image quality, Optical filters, Holography applications, Modulators, Spatial resolution

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Proceedings Article | 27 April 2016 Paper

Demonstration of digital hologram recording and 3D-scenes reconstruction in real-time

Pavel Cheremkhin, Nikolay Evtikhiev, Vitaly Krasnov, Mikhail Kulakov, Ekaterina Kurbatova, Dmitriy Molodtsov, Vladislav Rodin

Proceedings Volume 9889, 98891M (2016) https://doi.org/10.1117/12.2227767

KEYWORDS: Digital holography, Spatial light modulators, Holograms, Cameras, Holography, Digital video recorders, Video, Digital recording, Optical resolution, Digital holography, Digital cameras, 3D image reconstruction, Digital imaging, Liquid crystal on silicon

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Proceedings Article | 27 April 2016 Paper

Application of input amplitude masks in image encryption with spatially incoherent illumination for increase of decrypted images signal-to-noise ratio

Pavel Cheremkhin, Nikolay Evtikhiev, Vitaly Krasnov, Dmitriy Molodtsov, Vladislav Rodin, Anna Shifrina

Proceedings Volume 9889, 98891I (2016) https://doi.org/10.1117/12.2227596

KEYWORDS: Image encryption, Signal to noise ratio, Image quality, Optical image encryption, Computer programming, Convolution, Holography, Computer simulations, Spatial frequencies, Interference (communication), Signal to noise ratio, Optical image encryption, Diffractive optical elements, Point spread functions, Inverse optics

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Proceedings Article | 9 September 2015 Paper

Variants of light modulation for MINACE filter implementation in 4-F correlators

Dmitry Shaulskiy, Nikolay Evtikhiev, Evgenii Zlokazov, Sergey Starikov, Rostislav Starikov, Elizaveta Petrova, Dmitry Molodtsov

Proceedings Volume 9598, 95980T (2015) https://doi.org/10.1117/12.2190700

KEYWORDS: Holography, Binary data, Spatial light modulators, Modulation, Optical correlators, Digital holography, Distortion, Optical simulations, Computer generated holography, Modulators

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Proceedings Article | 8 May 2015 Paper

Synthesis of Fourier holograms for recognition of radiation sources with continuous spectra by dispersive correlators

D. Molodtsov, V. Rodin, S. Starikov

Proceedings Volume 9508, 950812 (2015) https://doi.org/10.1117/12.2182281

KEYWORDS: Holograms, Optical correlators, Diffraction, Optical filters, Light emitting diodes, Holography, Spatial filters, Object recognition, Mercury, Lamps

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Dispersive correlators have been proposed previously for solving problems of recognition of radiating objects in real time. Correlation signals are formed by radiation of analyzed object during its interaction with spatial filter. Most difficult recognition case is when spectrum of input radiation is continuous (non-line spectrum). Method of synthesis of Fourier holograms for their using in dispersive correlators as spatial filters is developed in this work. Spectral ranges, in which values of components of radiation are greater than predetermined threshold for reference spectrum, were determined. Entrance slit used as reference object. Next, spatial image of spectrum, which is a set of images of object (slit), was formed. Amount of object images and its sizes are determined with selected wavelength ranges. Fourier hologram of this image was computer synthesized and had 2048x2048 pixels. Then this hologram was binarized and printed using laser imagesetter with 100 dots/mm resolution. In this work the scheme of the dispersive correlator with single Fourier-objective was used. Correlation signals for different spectra were experimentally formed. LEDs, including RGB-LED with ability of dynamically changing of composition of radiation spectrum, were used as radiation sources. Post-processing operations, which provide independence of recognition results from radiation source power and holograms diffraction efficiency, were defined. Three methods of normalization of correlation signal for identification signal obtaining were experimentally tested and compared. These methods are normalization to radiation power in zero, first, and both of these diffraction orders. Experimental results on identification of test sources with non-line radiation spectra are obtained. They show successful recognition of used LED sources of different colors. Average ratio of spectra coincidence signal to mismatch signal was 4.6 at relative spectral resolution of used setup equaled to 0.004.

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