Prof. Marek Zajac Profile

Prof. Marek Zajac

Associate Professor at Wroclaw Univ of Technology

SPIE Involvement:

Author

Publications (29)

Proceedings Article | 28 September 2016 Paper

A technique of experimental and numerical analysis of influence of defects in the intraocular lens on the retinal image quality

Malwina Geniusz, Marek Zając

Proceedings Volume 9971, 997125 (2016) https://doi.org/10.1117/12.2238082

KEYWORDS: Image quality, Eye models, Eye, Zemax, Numerical analysis, Light scattering, Modulation transfer functions, Image analysis, Retina, Cornea

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Intraocular lens (IOL) is an artificial lens implanted into the eye in order to restore correct vision after the removal of natural lens cloudy due to cataract. The IOL prolonged stay in the eyeball causes the creation of different changes on the surface and inside the implant mainly in form of small-size local defects such as vacuoles and calcium deposites. Their presence worsens the imaging properties of the eye mainly due to occurence of scattered light thus deteriorating the vision quality of patients after cataract surgery. It is very difficult to study influence the effects of these changes on image quality in real patients. To avoid these difficulties two other possibilities were chosen: the analysis of the image obtained in an optomechanical eye model with artificially aged IOL as well as numerical calculation of the image characteristics while the eye lens is burdened with adequately modeled defects. In experiments the optomechanical model of an eye consisting of a glass “cornea”, chamber filled with liquid where the IOL under investigation was inserted and a high resulution CCC detector serving as a “retina” was used. The Modulation Transfer Function (MTF) of such “eye” was evaluated on the basis of image of an edge. Experiments show that there is significant connection between ageing defects and decrease in MTF parameters. Numerical part was performed with a computer programme for optical imaging analysis (OpticStudio Professional, Zemax Professional from Radiant Zemax, LLC). On the basis of Atchison eye model with lens burdened with defects Modulation Transfer Functio was calculated. Particular parameters of defects used in a numerical model were based on own measurements. Numerical simulation also show significant connection between ageing defects and decrease of MTF parameters. With this technique the influence of types, density and distribution of local defect in the IOL on the retinal image quality can be evaluated quickly without the need of performing very difficult and even dangereous experiments on real human patients.

Proceedings Article | 18 December 2012 Paper

Evaluation of intraocular lens implant location in the eyeball basing on the Purkinje images

A. Jóźwik, D. Siedlecki, M. Zając

Proceedings Volume 8697, 86970O (2012) https://doi.org/10.1117/12.2009985

KEYWORDS: Eye, Fiber optic illuminators, Eye models, CCD cameras, Crystals, Image analysis, Image quality, Light emitting diodes, Spherical lenses, Error analysis

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Proceedings Article | 20 November 2008 Paper

Physical model of human eye with implantable intraocular lenses

Agnieszka Barcik, Jerzy Nowak, Damian Siedlecki, Marek Zając, Józef Zarówny

Proceedings Volume 7141, 71411A (2008) https://doi.org/10.1117/12.822391

KEYWORDS: Eye, Eye models, Modulation transfer functions, Image analysis, Image quality, Cornea, Liquids, Stars, Intraocular lenses, Sensors

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Proceedings Article | 13 July 2007 Paper

Retinal image quality with the different types of intraocular lenses including new idea of the hybrid IOLs

D. Siedlecki, M. Zając, J. Nowak

Proceedings Volume 6633, 663329 (2007) https://doi.org/10.1117/12.728358

KEYWORDS: Eye, Chromatic aberrations, Image quality, Eye models, Silicon, Point spread functions, Polymethylmethacrylate, Modulation transfer functions, Crystals, Intraocular lenses

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Proceedings Article | 12 April 2007 Paper

Characteristics of the retinal images of the eye optical systems with implanted intraocular lenses

Damian Siedlecki, Marek Zając, Jerzy Nowak

Proceedings Volume 6609, 66091C (2007) https://doi.org/10.1117/12.739678

KEYWORDS: Eye, Eye models, Chromatic aberrations, Silicon, Polymethylmethacrylate, Crystals, Image quality, Monochromatic aberrations, Point spread functions, Modulation transfer functions

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Proceedings Article | 12 April 2007 Paper

Retinal images in the human eye with implanted intraocular lens

Marek Zając, Damian Siedlecki, Jerzy Nowak

Proceedings Volume 6609, 66091D (2007) https://doi.org/10.1117/12.739679

KEYWORDS: Eye, Chromatic aberrations, Eye models, Image quality, Diffractive optical elements, Crystals, Opacity, Point spread functions, Colorimetry, Polymethylmethacrylate

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Proceedings Article | 12 April 2007 Paper

Vision screening in school children in Strzelin County

Marek Zając

Proceedings Volume 6609, 66091N (2007) https://doi.org/10.1117/12.739732

KEYWORDS: Visualization, Color vision, Eye, Eyeglasses, Polarization, Monochromatic aberrations, Refraction, Color blindness, Head, Diagnostics

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Proceedings Article | 6 December 2006 Paper

Correction of field aberrations in a hybrid triplet objective

Marek Zając, Jerzy Nowak

Proceedings Volume 5945, 594513 (2006) https://doi.org/10.1117/12.638944

KEYWORDS: Objectives, Glasses, Monochromatic aberrations, Lens design, Diffractive optical elements, Chromatic aberrations, Spherical lenses, Chemical elements, Colorimetry, Fluorine

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SPIE Journal Paper | 1 September 2006 Open Access

Placement of a crystalline lens and intraocular lens: retinal image quality

Damian Siedlecki, Jerzy Nowak, Marek Zajac

JBO, Vol. 11, Issue 05, 054012, (September 2006) https://doi.org/10.1117/12.10.1117/1.2358959

KEYWORDS: Crystals, Eye models, Eye, Image quality, Chromatic aberrations, Polymethylmethacrylate, Modulation transfer functions, Tolerancing, Gradient-index optics, Image quality standards

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Proceedings Article | 21 November 2003 Paper

Simple achromatic hybrid lens

Marek Zajac, Jerzy Nowak

Proceedings Volume 5259, (2003) https://doi.org/10.1117/12.545108

KEYWORDS: Objectives, Glasses, Diffractive optical elements, Monochromatic aberrations, Aberration correction, Chemical elements, Chromatic aberrations, Physics, Optical components, Spherical lenses

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Proceedings Article | 21 November 2003 Paper

Hybrid achromatic spectacle lens

Marek Zajac

Proceedings Volume 5259, (2003) https://doi.org/10.1117/12.545111

KEYWORDS: Monochromatic aberrations, Eyeglasses, Glasses, Chromatic aberrations, Lens design, Aberration correction, Spherical lenses, Physics, Optical imaging, Optical components

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Proceedings Article | 21 November 2003 Paper

Measurement of contrast sensitivity function in laser light

Katarzyna Sarnowska-Habrat, Boguslawa Dubik, Marek Zajac

Proceedings Volume 5259, (2003) https://doi.org/10.1117/12.545159

KEYWORDS: Spatial frequencies, Eye, Contrast sensitivity, Optical testing, Optical transfer functions, Image quality, Retina, Visualization, Refraction, Image transmission

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Proceedings Article | 4 May 2001 Paper

Visual resolution in incoherent and coherent light: preliminary investigation

Katarzyna Sarnowska-Habrat, Boguslawa Dubik, Marek Zajac

Proceedings Volume 4241, (2001) https://doi.org/10.1117/12.431513

KEYWORDS: Visualization, Spatial frequencies, Spatial resolution, Interferometers, Optical filters, Lamps, Optical testing, Glasses, Human vision and color perception, Color vision

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Proceedings Article | 7 March 2001 Paper

Measurements of accommodation amplitude in polychromatic light

Katarzyna Sarnowska-Habrat, Boguslawa Dubik, Marek Zajac

Proceedings Volume 4356, (2001) https://doi.org/10.1117/12.417856

KEYWORDS: Eye, Visualization, Ronchi rulings, Speckle, Image analysis, Optical filters, Optical testing, Retina, Signal detection, Signal processing

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Proceedings Article | 6 April 2000 Paper

Computer-based tester for visual acuity measurements

Katarzyna Sarnowska-Habrat, Marek Zajac, Boguslawa Dubik

Proceedings Volume 4001, (2000) https://doi.org/10.1117/12.381496

KEYWORDS: Visualization, Signal processing, Eye, Signal detection, Ophthalmology, Biophysics, Visual system, Refraction, Physics, Brain

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Proceedings Article | 14 July 1999 Paper

Design methodology of a hybrid lens

Jerzy Nowak, Marek Zajac

Proceedings Volume 3820, (1999) https://doi.org/10.1117/12.353102

KEYWORDS: Monochromatic aberrations, Glasses, Lens design, Point spread functions, Diffraction, Chromatic aberrations, Spherical lenses, Refraction, Colorimetry, Distortion

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Proceedings Article | 14 July 1999 Paper

Aspects of visual acuity measurement

Boguslawa Dubik, Marek Zajac

Proceedings Volume 3820, (1999) https://doi.org/10.1117/12.353092

KEYWORDS: Visualization, Target recognition, Analytical research, Eye, Target detection, Error analysis, Process control, Data conversion, Image quality, Quality measurement

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Proceedings Article | 1 January 1998 Paper

Measurement of wavefront aberrations of diffractive imaging elements

Marek Zajac, Boguslawa Dubik

Proceedings Volume 3320, (1998) https://doi.org/10.1117/12.301344

KEYWORDS: Wavefronts, Interferometers, Wavefront aberrations, Holography, Holographic interferometry, Shearing interferometers, Diffraction, Optical components, Interferometry, Optical spheres

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Proceedings Article | 1 January 1998 Paper

Correction of aperture aberrations of hybrid lens

Marek Zajac, Jerzy Nowak

Proceedings Volume 3320, (1998) https://doi.org/10.1117/12.301343

KEYWORDS: Monochromatic aberrations, Aberration correction, Glasses, Holography, Spherical lenses, Image quality, Manufacturing, Refractive index, Optical components, Wavefronts

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Proceedings Article | 23 August 1996 Paper

Hybrid imaging element: possibilites of aberration correction

Leon Magiera, Jerzy Nowak, Marek Zajac

Proceedings Volume 2774, (1996) https://doi.org/10.1117/12.246663

KEYWORDS: Monochromatic aberrations, Glasses, Spherical lenses, Spatial frequencies, Imaging systems, Aberration correction, Holography, Chemical elements, Optical components, Manufacturing

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Proceedings Article | 11 August 1995 Paper

Aplanatic correction of a hybrid lens

Slawomir Koth, Jerzy Nowak, Marek Zajac

Proceedings Volume 2537, (1995) https://doi.org/10.1117/12.216396

KEYWORDS: Monochromatic aberrations, Spherical lenses, Spatial frequencies, Holography, Surface finishing, Refractive index, Optical imaging, Chemical elements, Optical components, Manufacturing

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Proceedings Article | 12 October 1994 Paper

Evaluation of hybrid lens quality based on point spread function calculation

Jan Masajada, Jerzy Nowak, Marek Zajac

Proceedings Volume 2169, (1994) https://doi.org/10.1117/12.190219

KEYWORDS: Image quality, Diffraction, Point spread functions, Computing systems, Holograms, Image analysis, Glasses, Numerical analysis, Holography, Lead

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Proceedings Article | 12 October 1994 Paper

Third order aberrations of a hybrid lens

Boguslawa Dubik, Slawomir Koth, Marek Zajac

Proceedings Volume 2169, (1994) https://doi.org/10.1117/12.190218

KEYWORDS: Monochromatic aberrations, Chromatic aberrations, Spherical lenses, Glasses, Lens design, Refractive index, Ray tracing, Distortion, Palladium, Aberration correction

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Proceedings Article | 15 April 1993 Paper

Imaging quality of Fourier-transforming diffractive lens

Marek Zajac, Jerzy Nowak

Proceedings Volume 1780, 178014 (1993) https://doi.org/10.1117/12.142835

KEYWORDS: Monochromatic aberrations, Holography, Spherical lenses, Distortion, Image processing, Transparency, Fourier transforms

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Proceedings Article | 5 January 1993 Paper

Influence of recording material on image quality of diffractive lens

Marek Zajac

Proceedings Volume 1718, (1993) https://doi.org/10.1117/12.138562

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SPIE Journal Paper | 1 March 1992

Aberrations of holographic lenses in image quality evaluation

Boguslawa Dubik, Jan Masajada, Jerzy Nowak, Marek Zajac

OE, Vol. 31, Issue 03, (March 1992) https://doi.org/10.1117/12.10.1117/12.56104

KEYWORDS: Monochromatic aberrations, Diffraction, Holography, Distortion, Image quality, Lenses, Aberration correction, Image processing, Spherical lenses, Point spread functions

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Proceedings Article | 1 October 1991 Paper

Investigation of imaging quality of Fourier holographic lens

Marek Zajac, Jerzy Nowak

Proceedings Volume 1574, (1991) https://doi.org/10.1117/12.50101

KEYWORDS: Monochromatic aberrations, Spatial frequencies, Holography, Spectrum analysis, Spherical lenses, Distortion, Imaging systems, Diffractive optical elements, Fourier transforms, Lens design

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Proceedings Article | 1 October 1991 Paper

Sphero-chromatic aberration correction of single holo-lens used as a spectral device

Boguslawa Dubik, Marek Zajac

Proceedings Volume 1574, (1991) https://doi.org/10.1117/12.50104

KEYWORDS: Monochromators, Holographic optical elements, Monochromatic aberrations, Diffractive optical elements, Holography, Spectroscopy, Photography, Spectroscopes, Chromatic aberrations, Molybdenum

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Proceedings Article | 1 September 1991 Paper

Effect of coma correction on the imaging quality of holographic lenses

Marek Zajac, Jerzy Nowak

Proceedings Volume 1507, (1991) https://doi.org/10.1117/12.47082

KEYWORDS: Monochromatic aberrations, Holographic optical elements, Holography, Lenses, Spherical lenses, Aberration theory, Numerical modeling, Diffraction, Image processing, Aberration correction

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