Dr. Oksana P. Budnyk Profile

Dr. Oksana P. Budnyk

Postgraduate Student at Institute of Applied Optics

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Publications (6)

Proceedings Article | 6 December 2006 Paper

Novel design digital holographic system with LC spatial light modulators for diffractive element production

Ruslan Lymarenko, Oksana Budnyk

Proceedings Volume 6023, 602302 (2006) https://doi.org/10.1117/12.648155

KEYWORDS: Digital holography, Diffraction, Holograms, Diffraction gratings, Holography, Spatial light modulators, Image restoration, Image compression, Optical design, Computer generated holography

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Liquid crystal displays in different modes are suitable due to their birefringence properties and wide transmission range. The paper discussed advantages amplitude-phase modulators and focused on boundary conditions for the application in digital holography (generation of 3D light wave) and for dynamic pattern generation. Implementation demands are discussed on the example of an optical system for parallel recording and optical reconstruction of digital hologram. Optical methods based on digital holography are highly effective for diffractive element synthesis. Modern production of digital hologram is characterized by high degree of flexibility and complexity. According to this the use of proposed method is useful for designing and developing an optical system able not only for fringe pattern fabric structures but as well to allow more complex pattern including singular for image forming. We report on a method for synthesis of digital holograms taken with interference of laser beams diffracted on a spatial light modulator. The proposed technique for modeling of adaptive diffractive elements computes the propagation of the complex optical wavefront diffracted by the object and used to determine the needed spatial light modulator (SLM) pattern. The extension of new method of modeling diffraction on amplitude-phase mask and possibilities of its practical application such as computer modeling of diffraction on a SLM, which consists of squared cells, for a wavefront reconstruction are considered. Conclusions regarding the possibilities the representation the arbitrary fields by using the discrete matrix of elementary diffractive aperture cell for enhancement of iteration algorithm of hologram synthesis and phase retrieval are arrived at. Proposed method for computer-generated holograms (CGH) enables one to synthesize CGH's and simulate digital image processing techniques for 3D image reconstruction. The process does not contain any Fourier transform calculations, and can thus be performed directly by grating recorder in line with recording. Nowadays miniaturized CCD and recent successes in optical spatial light modulator system devices allow building compact digital holographic system. Combining the original dot-matrix method with interferometric image forming allows obtaining new visual effects for hologram or diffractive elements synthesis. The new approach in this project is the idea of using the optical interference field is recorded at the same time in different areas to give multiple grating. Thus the image cell that are written are not separated into discrete dots of diffraction grating, like conventional dot-matrix spots, but form a continuous recording over relatively large area. Some advantages are that the basic cell, or pixel, is composed of not only a set of diffraction grating with various spatial frequencies but also may contain arbitrary pattern form and contain the hidden image or coding visual information. The result obtained by numerical and experimental means are presented together with a discussion of the limitations and further possibilities of this method.

Proceedings Article | 15 September 2006 Paper

Method of digital hologram synthesis for hidden image optical coding in holographic security devices

Ruslan Lymarenko, Oksana Budnyk

Proceedings Volume 6341, 63411Y (2006) https://doi.org/10.1117/12.695475

KEYWORDS: Holograms, Image compression, Diffraction, Computer generated holography, Holography, Digital holography, 3D image reconstruction, Image restoration, Chemical elements, Digital imaging

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Proceedings Article | 7 October 2005 Paper

Simulation, registration and reconstruction of digital holograms of arbitrary objects by means of liquid crystal on silicon spatial light modulator

Aneta Michalkiewicz, Malgorzata Kujawinska, Ruslan Lymarenko, Oksana Budnyk, Xingua Wang, Philip Bos

Proceedings Volume 5947, 59470G (2005) https://doi.org/10.1117/12.621834

KEYWORDS: Holograms, Digital holography, Liquid crystal on silicon, Optoelectronics, Computer generated holography, Wavefronts, 3D image reconstruction, Spatial light modulators, Image registration, Optical simulations

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Proceedings Article | 10 September 2004 Paper

Technique for modeling diffractive multiphase holographic elements

Ruslan Lymarenko, Oksana Budnyk

Proceedings Volume 5457, (2004) https://doi.org/10.1117/12.545291

KEYWORDS: Diffraction, Holograms, Chemical elements, Computer generated holography, Computer simulations, Algorithm development, Spatial light modulators, Reconstruction algorithms, Holography, Diffraction gratings

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Proceedings Article | 3 December 2003 Paper

New method of diffraction modeling on liquid crystal amplitude-phase screen with square cell for synthesis of wavefront in 3D image visualization system

Ruslan Lymarenko, Oksana Budnyk, V. Sporik, Andrey Budnyk

Proceedings Volume 5257, (2003) https://doi.org/10.1117/12.545814

KEYWORDS: Diffraction, Algorithm development, Holograms, Liquid crystals, Computer simulations, Wavefronts, Holography, Image visualization, 3D displays, Chemical elements

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The possibility of using a new method of the wave equation solution for computer modeling of diffraction on a liquid crystal amplitude phase mask, which consists of squared cell, for a wavefront reconstruction, structured light beam generation and image composition was considered. The method is based on a new integral approach to modeling the plane wave diffraction on an arbitrary two dimensional aperture by investigation of the singular wave component as informative part of diffraction field. It was shown that the result of diffraction on arbitrary aperture being treated as a discrete sum of elementary unit cell waves and diffracted field can be presented via orthogonal wave functions that play a role of eigenmodes as plane waves in free space. Developed on the basis of proposed integral representation the effective algorithm is useful for providing analytical studying and numerical modeling the aperture diffracted field and allows eliciting features of spatial behavior. The specific form of the convolution kernel that describes the diffraction with taking into account the size of cell allows alternative reconstruction procedure of a diffraction pattern. Application of new procedure to practical diffraction related phenomena may improve the processing efficiency without creating any artifacts associated with the diffraction field. The extension of new method of modeling diffraction on liquid crystal panel and possibilities of its practical application to information display are considered. The result of theoretical study and computer modeling the diffraction on a discrete matrix of square elements in near field with Unit Cell Wave concept applied to arbitrary surface description was represented. Conclusions regarding the possibilities to represent the arbitrary fields by using the discrete matrix of squared cells are arrived at. The technique for optical coding an adaptive optical hidden image in holographic elements has been proposed. A structure of a system that seems promising to produce a like hologram and method of operation directly images a pattern, which is previously calculated using a computer and displayed on the liquid crystal panel was explained. It was discussed the method of complex amplitude phase field distribution modeling in screen plane for three-DI scene synthesis as well as capabilities and characteristics of amplitude phase liquid crystal display for dynamic image visualization by using the "wavegram". This technique and algorithm for an aperture - synthesized image of three-dimensional objects can be applied to holographic screen technology development, which may have ever-growing use in many applied areas of systems for three-dimensional information visualization.

Proceedings Article | 30 May 2003 Paper

Multifrequency laser beam use in an interferometer vibration measuring system

Oksana Budnyk, Ruslan Lymarenko

Proceedings Volume 5144, (2003) https://doi.org/10.1117/12.500282

KEYWORDS: Laser resonators, Interferometers, Coherence (optics), Resonators, Semiconductor lasers, Acousto-optics, Nondestructive evaluation, Heterodyning, Modulation, Interferometry

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