Prof. Tomasz Szoplik Profile

Prof. Tomasz Szoplik

Full Professor of Optics at Univ of Warsaw

SPIE Involvement:

Publications (63)

SPIE Conference Volume | June 22, 2017

Metamaterials XI

PROCEEDINGS ARTICLE | May 16, 2017

General rules for incorporating noble metal nanoparticles in organic solar cells

Proc. SPIE. 10227, Metamaterials XI

KEYWORDS: Plasmonics, Photovoltaics, Refractive index, Finite-difference time-domain method, Organic photovoltaics, Nanoparticles, Metals, Solar cells, Germanium, Silver, Aluminum, Absorption

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SPIE Conference Volume | May 19, 2015

Metamaterials X

PROCEEDINGS ARTICLE | May 5, 2015

Enhancement of light absorption in polyazomethines due to plasmon excitation on randomly distributed metal nanoparticles

Proc. SPIE. 9502, Metamaterials X

KEYWORDS: Refractive index, Finite-difference time-domain method, Scattering, Nanoparticles, Polymers, Metals, Solar cells, Silver, Aluminum, Absorption

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In photovoltaic devices, metal nanoparticles embedded in a semiconductor layer allow the enhancement of solar-toelectric energy conversion efficiency due to enhanced light absorption via a prolonged optical path, enhanced electric fields near the metallic inclusions, direct injection of hot electrons, or local heating. Here we pursue the first two avenues. In the first, light scattered at an angle beyond the critical angle for reflection is coupled into the semiconductor layer and confined within such planar waveguide up to possible exciton generation. In the second, light is trapped by the excitation of localized surface plasmons on metal nanoparticles leading to enhanced near-field plasmon-exciton coupling at the peak of the plasmon resonance. We report on results of a numerical experiment on light absorption in polymer- (fullerene derivative) blends, using the 3D FDTD method, where exact optical parameters of the materials involved are taken from our recent measurements. In simulations we investigate light absorption in randomly distributed metal nanoparticles dispersed in polyazomethine-(fullerene derivative) blends, which serve as active layers in bulkheterojunction polymer solar cells. In the study Ag and Al nanoparticles of different diameters and fill factors are diffused in two air-stable aromatic polyazomethines with different chemical structures (abbreviated S9POF and S15POF) mixed with phenyl-C₆₁-butyric acid methyl ester (PCBM) or [6,6]-phenyl-C₇₁-butyric acid methyl ester (PC₇₁BM). The mixtures are spin coated on a 100 nm thick Al layer deposited on a fused silica substrate. Optical constants of the active layers are taken from spectroscopic ellipsometry and reflectance measurements using a rotating analyzer type ellipsometer with auto-retarder performed in the wavelength range from 225 nm to 2200 nm. The permittivities of Ag and Al particles of diameters from 20 to 60 nm are assumed to be equal to those measured on 100 to 200 nm thick metal films.

PROCEEDINGS ARTICLE | May 2, 2014

Permittivity, specific resistivity and surface roughness of silver nanolayers for plasmonic applications

Proc. SPIE. 9125, Metamaterials IX

KEYWORDS: Plasmonics, Refractive index, Silica, Scattering, Metals, Germanium, Nickel, Silver, Surface roughness, Sapphire

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PROCEEDINGS ARTICLE | June 10, 2013

Fabrication of plasmonic structures on LN2 cooled substrates

Proc. SPIE. 8882, ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III

KEYWORDS: Plasmonics, Multilayers, Silica, Metals, Germanium, Silver, Surface roughness, Atomic force microscopy, Sapphire, Temperature metrology

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SPIE Conference Volume | May 15, 2013

Metamaterials VIII

PROCEEDINGS ARTICLE | April 15, 2013

Resolution of near-field to near-field imaging with silver nanolayer

Proc. SPIE. 8771, Metamaterials VIII

KEYWORDS: Plasmonics, Silica, Germanium, Silver, Image resolution, Chromium, Near field scanning optical microscopy, Near field, Sapphire, Near field optics

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PROCEEDINGS ARTICLE | May 1, 2012

Concentrator of magnetic field of light

Proc. SPIE. 8423, Metamaterials VII

KEYWORDS: Metamaterials, Solar concentrators, Metals, Dielectrics, Silver, Coating, Magnetism, Near field scanning optical microscopy, Near field, Aluminum

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PROCEEDINGS ARTICLE | May 19, 2011

Bi-metal coated aperture SNOM probes

Proc. SPIE. 8070, Metamaterials VI

KEYWORDS: Gold, Plasmons, Metals, Skin, Copper, Interfaces, Silver, Coating, Near field scanning optical microscopy, Aluminum

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PROCEEDINGS ARTICLE | May 18, 2011

Magnetic probe for material characterization at optical frequencies

Proc. SPIE. 8070, Metamaterials VI

KEYWORDS: Metamaterials, Plasmonics, Plasmons, Metals, Dielectrics, Silver, Magnetism, Near field scanning optical microscopy, Near field, Near field optics

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PROCEEDINGS ARTICLE | May 18, 2011

Optimization of transmission and focusing properties of plasmonic nanolenses

Proc. SPIE. 8070, Metamaterials VI

KEYWORDS: Plasmonics, Plasmons, Refractive index, Lenses, Metals, Dielectrics, Silver, Free space, Constructive interference, Wave propagation

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PROCEEDINGS ARTICLE | May 18, 2011

Fabrication of corrugated probes for scanning near-field optical microscopy

Proc. SPIE. 8070, Metamaterials VI

KEYWORDS: Refractive index, Silica, Fiber Bragg gratings, Etching, Ultraviolet radiation, Interfaces, Optical microscopy, Coating, Scanning electron microscopy, Near field scanning optical microscopy

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SPIE Conference Volume | May 4, 2011

Metamaterials VI

PROCEEDINGS ARTICLE | December 15, 2010

Performance of SNOM probes with one groove at core: cladding interface

Proc. SPIE. 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Gold, Plasmons, Finite-difference time-domain method, Cladding, Metals, Copper, Interfaces, Coating, Near field scanning optical microscopy, Aluminum

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PROCEEDINGS ARTICLE | December 15, 2010

Plasmonic nanolenses made of noble metals focusing into far-field

Proc. SPIE. 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Gold, Optical fibers, Plasmonics, Cladding, Metals, Copper, Dielectrics, Silver, Aluminum, Absorption

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PROCEEDINGS ARTICLE | April 29, 2010

Influence of fabrication accuracies of metal-dielectric layered flat lenses on their imaging properties

Proc. SPIE. 7711, Metamaterials V

KEYWORDS: Point spread functions, Multilayers, Titanium dioxide, Silica, Lenses, Metals, Error analysis, Dielectrics, Silver, Superlenses

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PROCEEDINGS ARTICLE | April 29, 2010

Optimisation of a plasmonic nanolens: increase of transmission and focal length

Proc. SPIE. 7711, Metamaterials V

KEYWORDS: Plasmonics, Plasmons, Diffraction, Finite-difference time-domain method, Waveguides, Lenses, Cladding, Metals, Dielectrics, Silver

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PROCEEDINGS ARTICLE | December 31, 2009

Super-resolving metallo-dielectric flat lens

Proc. SPIE. 7388, Ninth International Conference on Correlation Optics

KEYWORDS: Plasmonics, Diffraction, Point spread functions, Super resolution, Polarization, Metals, Dielectrics, Silver, Wave propagation, Near field optics

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PROCEEDINGS ARTICLE | May 12, 2009

Dielectric-metal-dielectric nanotip for SNOM

Proc. SPIE. 7353, Metamaterials IV

KEYWORDS: Plasmons, Refractive index, Finite-difference time-domain method, Cladding, Metals, Dielectrics, Interfaces, Silver, Coating, Near field scanning optical microscopy

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PROCEEDINGS ARTICLE | May 12, 2009

Focusing of radially polarized light with corrugated silver nanolayer

Proc. SPIE. 7353, Metamaterials IV

KEYWORDS: Plasmons, Surface plasmons, Finite-difference time-domain method, Polarization, Metals, Silver, Wave propagation, Erbium, Nano optics, Near field optics

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PROCEEDINGS ARTICLE | May 12, 2009

Metal-dielectric superlens with ultra-flat phase of the modulation transfer function

Proc. SPIE. 7353, Metamaterials IV

KEYWORDS: Diffraction, Point spread functions, Finite-difference time-domain method, Spatial frequencies, Dielectrics, Image resolution, Phase shift keying, Wave propagation, Solids, Modulation transfer functions

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SPIE Conference Volume | May 7, 2009

Metamaterials IV

PROCEEDINGS ARTICLE | November 20, 2008

High resolution SNOM probes

Proc. SPIE. 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Plasmons, Refractive index, Metals, Skin, Dielectrics, Interfaces, Silver, Coating, Near field scanning optical microscopy, Aluminum

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PROCEEDINGS ARTICLE | November 20, 2008

Trade-off analysis of superresolution and transparency in metal-dielectric nanolayered superlens

Proc. SPIE. 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Point spread functions, Multilayers, Transparency, Super resolution, Dielectrics, Silver, Image resolution, Near field, Wave propagation, Modulation transfer functions

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PROCEEDINGS ARTICLE | May 6, 2008

Enhanced energy throughput in corrugated tapered metal-coated SNOM probes

Proc. SPIE. 6987, Metamaterials III

KEYWORDS: Point spread functions, Surface plasmons, Metals, Dielectrics, Interfaces, Silver, Coating, Image resolution, Near field scanning optical microscopy, Superlenses

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PROCEEDINGS ARTICLE | April 22, 2008

Beam shaping with nanooptical devices

Proc. SPIE. 7008, Eighth International Conference on Correlation Optics

KEYWORDS: Plasmons, Surface plasmons, Waveguides, Metals, Interfaces, Silver, Near field scanning optical microscopy, Beam shaping, Light wave propagation, Radio propagation

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PROCEEDINGS ARTICLE | May 4, 2007

Dispersion effects in light pulses refracted from right- to left-handed media

Proc. SPIE. 6581, Metamaterials II

KEYWORDS: Metamaterials, Gaussian beams, Dispersion, Interfaces, Magnetism, Wave propagation, Refraction, Optical simulations, Negative refraction

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SPIE Conference Volume | May 3, 2007

Metamaterials II

PROCEEDINGS ARTICLE | April 9, 2007

Two-dimensional metal-glass photonic crystal

Proc. SPIE. 6608, Lightguides and Their Applications III

KEYWORDS: Photonic crystal fibers, Statistical analysis, Metals, Glasses, Crystals, Silver, Photonic crystals, Negative refraction, Tin, Nanowires

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PROCEEDINGS ARTICLE | December 6, 2006

Metamaterials: composite materials with unnatural electromagnetic properties

Proc. SPIE. 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Waveguides, Metals, Composites, Dielectrics, Magnetism, Photonic crystals, Electromagnetic radiation, Negative refraction, Electromagnetism, Radio propagation

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PROCEEDINGS ARTICLE | June 14, 2006

Numerical investigation of energy transport along chains of silver nanorods and nanoplates

Proc. SPIE. 6254, Seventh International Conference on Correlation Optics

KEYWORDS: Plasmons, Gaussian beams, Waveguides, Signal attenuation, Metals, Dielectrics, Electrons, Silver, Radio propagation, Nanorods

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PROCEEDINGS ARTICLE | April 20, 2006

Plasmon waveguides on silver nanoelements

Proc. SPIE. 6195, Nanophotonics

KEYWORDS: Plasmons, Refractive index, Finite-difference time-domain method, Gaussian beams, Waveguides, Signal attenuation, Metals, Dielectrics, Silver, Light wave propagation

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PROCEEDINGS ARTICLE | October 14, 2005

Simulation and analysis of dynamic heating in the ultrafast aircraft thermometer measurements

Proc. SPIE. 5981, Optics in Atmospheric Propagation and Adaptive Systems VIII

KEYWORDS: Ultrafast phenomena, Ultrafast measurement systems, Sensors, Particles, Diffusion, Numerical simulations, Clouds, Thermal effects, Fluid dynamics, Temperature metrology

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PROCEEDINGS ARTICLE | September 28, 2005

Simulation of resonant behavior and negative refraction of metal nanowire composites

Proc. SPIE. 5955, Metamaterials

KEYWORDS: Metamaterials, Plasmons, Finite-difference time-domain method, Gaussian beams, Signal attenuation, Magnetism, Terahertz radiation, Negative refraction, Phase shifts, Nanowires

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A metal-in-dielectric metamaterial structure different from that composed of split-ring-resonators and wire units was proposed. The metamaterial layer is composed of randomly distributed parallel pairs of nanowires of subwavelength size that form electromagnetically active units. It was predicted that the metamaterial should exhibit macroscopic negative refraction. In a recent paper fabrication of the metamaterial in the form of periodic array of parallel golden nanorods with trapezoidal cross section was reported and a negative refractive index of n = -0.3 was observed at a wavelength 1.5 μm (200 THz). In this paper we simulate response of a single pair of nanowires to near-infrared illumination and observe surface plasmon resonances using FDTD method. We simulate light propagation through the metamaterial slab made of one, two and three layers. In each layer the nanowires cover 10% of the surface. In simulations made for a single layer medium, negative refraction is observed for wavelengths from 1.55 to 2.1 μm, with Δλ/λ ≈ 0.3. When the number of layers increases, the range of negatively refracted wavelengths becomes narrower. For a narrow range of wavelengths that are close to the resonant frequency the intensity transmission of three layers reaches −7dB for the angle of incidence of 10°. Then layers with two orientations of nanowires are considered. In the first stack of layers all nanowires are oriented in parallel. This configuration assures plasmon resonances for both the electric and magnetic components of electromagnetic wave in all layers. In the second stack, nanowires in two subsequent layers are oriented perpendicularly. In the second layer, the plasmon resonance for the electric component of light is due to the oblique incidence of light. For a small angle of incidence of a near infrared narrow Gaussian beam we calculate two characteristics: the attenuation vs. wavelength and the lateral shift of the beam on the plane-parallel slab vs. wavelength. For a narrow range of wavelengths simulations show negative refraction of a beam incident the plane of the nanowires and a corresponding shift in the far field.

PROCEEDINGS ARTICLE | September 28, 2005

Analysis of translation invariant metallic or double-negative material structures

Proc. SPIE. 5955, Metamaterials

KEYWORDS: Metamaterials, Refractive index, Waveguides, Cladding, Dispersion, Metals, Dielectrics, Photonic crystals, Wave propagation, Photonics

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SPIE Conference Volume | September 26, 2005

Metamaterials

PROCEEDINGS ARTICLE | November 11, 2004

Optimization of the atmospheric temperature field measurements

Proc. SPIE. 5572, Optics in Atmospheric Propagation and Adaptive Systems VII

KEYWORDS: Sensors, Resistance, Clouds, Turbulence, Spatial resolution, Aerodynamics, Atmospheric propagation, Geophysics, Atmospheric optics, Temperature metrology

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Small-scale inhomogeneities of the atmospheric temperature field are caused by air turbulence and result in refractive index fluctuations, which in turn influence the propagation of optical beams. Understanding small density fluctuations in the atmosphere is important for the free-space laser communication and for high-resolution imaging through the atmosphere. The ultra-fast aircraft resistance thermometer constructed in the Institute of Geophysics, Warsaw University, measures the temperature of cloudless air and of warm clouds with 10 kHz sampling frequency. During a flight at the speed of 100 m/s, at low altitudes up to 2 km, this corresponds to the spatial resolution of the order of one centimeter. This resolution is sufficient for studying small density fluctuations in the atmospheric boundary layer. A streamlined shield protects the sensing wire of the thermometer from cloud droplets and other small particles suspended in the air but introduce aerodynamic disturbances in the form of vortices. The thermometer records the resulting fluctuations of temperature as noise. The shield sucks air and water collected on its surface through the suction slits. This suction also suppresses the disturbances. In this paper we analyze how the temperature measurements are influenced by: (i) turbulence generated behind the shield placed in front of the sensing wire; (ii) suction of air through the shield slits; (iii) cloud droplets of various space distributions, masses and velocities. We have carried out the 2D numerical simulations of the time-dependent, incompressible, viscous flow (the Navier-Stokes equation) around the shield placed in a uniform stream. We solved the particle path equations for an ensamble of droplets in the Stokes approximation. All the simulations are oriented toward optimization of the shield shape in order to (i) reduce noise in measurements at low and high altitudes and (ii) protect the sensing wire against ice crystals in flights at high altitudes.

PROCEEDINGS ARTICLE | November 4, 2004

Optical implementations of threshold decomposition and morphological operations with dual-rail processing

Proc. SPIE. 5556, Photonic Devices and Algorithms for Computing VI

KEYWORDS: Transceivers, Logic, Image processing, Digital filtering, Optoelectronics, Photonics, Image filtering, Array processing, Binary data, Optical arrays

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PROCEEDINGS ARTICLE | September 15, 2004

Double-core photonic crystal fiber with square lattice

Proc. SPIE. 5450, Photonic Crystal Materials and Nanostructures

KEYWORDS: Photonic crystal fibers, Finite-difference time-domain method, Polarization, Dispersion, Glasses, Crystals, Photonic crystals, Structured optical fibers, Solids, Radio propagation

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PROCEEDINGS ARTICLE | September 8, 2004

Comparing characteristics and prospects of fabrication of multicomponent photonic crystal fibers with different lattice structures

Proc. SPIE. 5576, Lightguides and their Applications II

KEYWORDS: Refractive index, Photonic crystal fibers, Dispersion, Capillaries, Glasses, Crystals, Manufacturing, Photonic crystals, Structured optical fibers, Refraction

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PROCEEDINGS ARTICLE | September 8, 2004

Highly birefringent photonic crystal fibers with a square lattice

Proc. SPIE. 5576, Lightguides and their Applications II

KEYWORDS: Optical fibers, Modeling, Photonic crystal fibers, Polarization, Birefringence, Sensors, Crystals, Physics, Photonic crystals, Structured optical fibers

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PROCEEDINGS ARTICLE | September 8, 2004

Properties of a double-core photonic crystal fiber with a square lattice

Proc. SPIE. 5576, Lightguides and their Applications II

KEYWORDS: Refractive index, Photonic crystal fibers, Waveguides, Dispersion, Capillaries, Crystals, Manufacturing, Photonic crystals, Structured optical fibers, Fiber couplers

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PROCEEDINGS ARTICLE | August 16, 2004

Polymer-based pixel matrix display in MOEMS technology

Proc. SPIE. 5455, MEMS, MOEMS, and Micromachining

KEYWORDS: Light emitting diodes, Switching, Polymethylmethacrylate, Electrodes, Polymers, Laser ablation, LCDs, Projection systems, Microopto electromechanical systems, Information visualization

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PROCEEDINGS ARTICLE | February 6, 2004

Visualization of small density fluctuations of the atmosphere with spatial frequency filters

Proc. SPIE. 5237, Optics in Atmospheric Propagation and Adaptive Systems VI

KEYWORDS: Ultrafast phenomena, Optical filters, Visualization, Spatial frequencies, Spatial filters, Resistance, Linear filtering, Turbulence, Phase shifts, Protactinium

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PROCEEDINGS ARTICLE | December 31, 2003

Optimized visualization of phase objects with semiderivative real filters

Proc. SPIE. 5182, Wave-Optical Systems Engineering II

KEYWORDS: Optical filters, Modulation, Visualization, Spatial frequencies, Fourier transforms, Phase shift keying, Linear filtering, Image filtering, Transmittance, Phase shifts

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PROCEEDINGS ARTICLE | November 21, 2003

Visualization of phase objects with real semiderivative and schlieren filters: a comparison

Proc. SPIE. 5259, 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Diffraction, Optical filters, Modulation, Visualization, Imaging systems, Spatial frequencies, Phase shift keying, Image filtering, Transmittance, Phase shifts

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PROCEEDINGS ARTICLE | November 21, 2003

Global gray-level deformation removal in images

Proc. SPIE. 5259, 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics

KEYWORDS: Image processing, Photography, Image resolution, Linear filtering, Computer programming, Gaussian filters, Image filtering, Algorithm development, C++, Nonlinear filtering

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PROCEEDINGS ARTICLE | March 13, 2003

Contrast control for intensity deformation removal in grayscale and color images

Proc. SPIE. 4885, Image and Signal Processing for Remote Sensing VIII

KEYWORDS: Cameras, Image processing, Photography, Computer programming, Image filtering, Image enhancement, Image contrast enhancement, Algorithm development, C++, RGB color model

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PROCEEDINGS ARTICLE | November 30, 2001

Photonic morphological image processing

Proc. SPIE. 10302, Optoelectronic Information Processing: Optics for Information Systems: A Critical Review

KEYWORDS: Transceivers, Image processing, Optoelectronics, Binary data

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PROCEEDINGS ARTICLE | January 19, 2001

Semiautomatic preparation of a 3D terrain model based on hand-drawn topographical maps

Proc. SPIE. 4170, Image and Signal Processing for Remote Sensing VI

KEYWORDS: Lithium, Image processing, Remote sensing, 3D modeling, Signal processing, Digital Light Processing

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PROCEEDINGS ARTICLE | September 24, 1999

Demonstrator system for mathematical morphology operations on gray-level images

Proc. SPIE. 3900, 3rd International Conference on Optical Information Processing

KEYWORDS: Transceivers, Optical components, Logic, Image processing, Spatial light modulators, Vertical cavity surface emitting lasers, Signal generators, Binary data, Optical arrays, Mathematical morphology

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PROCEEDINGS ARTICLE | May 22, 1998

Compression of images using morphological subband decomposition

Proc. SPIE. 3490, Optics in Computing '98

KEYWORDS: Surface plasmons, Image compression, Image processing, Linear filtering, Image analysis, Signal processing, Image filtering, Chemical elements, Binary data, Mathematical morphology

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PROCEEDINGS ARTICLE | May 22, 1998

Fast optical thresholding with an optical thyristor array

Proc. SPIE. 3490, Optics in Computing '98

KEYWORDS: GRIN lenses, Logic, Switches, Switching, Spatial light modulators, Optoelectronics, Vertical cavity surface emitting lasers, Imaging arrays, Binary data, Optical arrays

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SPIE Journal Paper | September 1, 1996

Distributed kinoforms in optical security applications

Stepien, Pawel , Gajda, Remigiusz , Szoplik, Tomasz

OE Vol. 35 Issue 09

KEYWORDS: Computer generated holography, Holograms, Binary data, Holography, Fourier transforms, Visible radiation, Kinematics, Diffraction gratings, 3D image reconstruction, Optics manufacturing

PROCEEDINGS ARTICLE | September 1, 1996

Optoelectronic morphological processors

Proc. SPIE. 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology

KEYWORDS: Image processing, Digital filtering, Modulators, Optoelectronics, Image filtering, Convolution, Analog electronics, Nonlinear filtering, Binary data, Mathematical morphology

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PROCEEDINGS ARTICLE | March 15, 1996

Computer-generated optically variable devices containing hidden information

Proc. SPIE. 2659, Optical Security and Counterfeit Deterrence Techniques

KEYWORDS: Optical components, Holograms, Holography, Data hiding, Fourier transforms, Kinematics, Computer generated holography, Chemical elements, Binary data, Computer security

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PROCEEDINGS ARTICLE | March 15, 1996

Criteria on which a judgement of optically variable security marks may be based

Proc. SPIE. 2659, Optical Security and Counterfeit Deterrence Techniques

KEYWORDS: Diffraction, Holograms, Holography, 3D image reconstruction, Digital holography, Optical properties, Stereo holograms, Volume holography, Computer security, Diffraction gratings

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PROCEEDINGS ARTICLE | February 5, 1996

Mathematical morphology and rank-order filtering texture analysis in medical imaging

Proc. SPIE. 2730, Second Iberoamerican Meeting on Optics

KEYWORDS: Radio optics, Surgery, Image segmentation, Image processing, Radiography, Bone, Image filtering, Image enhancement, Nonlinear filtering, Mathematical morphology

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PROCEEDINGS ARTICLE | August 28, 1995

Accuracy of operations in a programmable morphological optoelectronic processor

Proc. SPIE. 2565, Optical Implementation of Information Processing

KEYWORDS: Diffraction, Image processing, Digital filtering, Spatial light modulators, Optoelectronics, Image filtering, Charge-coupled devices, Convolution, Binary data, Frame grabbers

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PROCEEDINGS ARTICLE | January 19, 1995

Nonlinear filtering of images in optical-digital processors

Proc. SPIE. 2363, 5th International Workshop on Digital Image Processing and Computer Graphics (DIP-94)

KEYWORDS: Optical filters, Transparency, Image processing, Digital filtering, Spatial light modulators, Image filtering, Convolution, Nonlinear filtering, Optical correlators, Binary data

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PROCEEDINGS ARTICLE | October 1, 1991

Elliptical coordinate transformed phase-only filter for shift and scale invariant pattern recognition

Proc. SPIE. 1574, Intl Colloquium on Diffractive Optical Elements

KEYWORDS: Optical filters, Diffractive optical elements, Spatial frequencies, Pattern recognition, Fourier transforms, Linear filtering, Computer generated holography, Target recognition, Optical correlators, Phase only filters

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