Dr. Karl Schulmeister Profile

Dr. Karl Schulmeister

at Seibersdorf Labor GmbH

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 20 March 2015 Paper

Near infrared radiation damage mechanism in the lens

Per Söderberg, Nooshin Talebizadeh, Konstantin Galichanin, Martin Kronschläger, Karl Schulmeister, Zhaohua Yu

Proceedings Volume 9307, 930717 (2015) https://doi.org/10.1117/12.2086661

KEYWORDS: Light scattering, In vivo imaging, Eye, Near infrared, Temperature metrology, Absorption, Iris, Fiber lasers, Collimation, Tissues

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SPIE Journal Paper | 20 January 2015 Open Access

Temperature-controlled in vivo ocular exposure to 1090-nm radiation suggests that near-infrared radiation cataract is thermally induced

Zhaohua Yu, Karl Schulmeister, Nooshin Talebizadeh, Martin Kronschläger, Per Söderberg

JBO, Vol. 20, Issue 01, 015003, (January 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.1.015003

KEYWORDS: Eye, Temperature metrology, In vivo imaging, Light scattering, Cornea, Lenses, Scatter measurement, Eye models, Infrared radiation, Data modeling

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SPIE Journal Paper | 16 October 2014 Open Access

Ocular temperature elevation induced by threshold in vivo exposure to 1090-nm infrared radiation and associated heat diffusion

Zhaohua Yu, Karl Schulmeister, Nooshin Talebizadeh, Martin Kronschläger, Per Söderberg

JBO, Vol. 19, Issue 10, 105008, (October 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.10.105008

KEYWORDS: Temperature metrology, Eye, Sclera, Optic nerve, In vivo imaging, Light scattering, Retina, Infrared radiation, Cornea, Sensors

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Proceedings Article | 23 February 2009 Paper

Photochemical effects in the lens from near infrared radiation?

Per Söderberg, Riyadh Al-Saqry, Karl Schulmeister, Konstantin Gallichanin, Martin Kronschläger, Zhaohua Yu

Proceedings Volume 7163, 716311 (2009) https://doi.org/10.1117/12.816848

KEYWORDS: Light scattering, In vivo imaging, Near infrared, Eye, Crystals, Cornea, Thermal effects, Retina, Optical testing, Continuous wave operation

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SPIE Journal Paper | 1 September 2008 Open Access

Ex vivo and computer model study on retinal thermal laser-induced damage in the visible wavelength range

Karl Schulmeister, Johannes Husinsky, Bernhard Seiser, Florian Edthofer, Beate Fekete, Letizia Farmer, David Lund

JBO, Vol. 13, Issue 05, 054038, (September 2008) https://doi.org/10.1117/12.10.1117/1.2982526

KEYWORDS: Laser damage threshold, Data modeling, Computer simulations, Retina, Thermal modeling, In vivo imaging, Pulsed laser operation, Injuries, Sensors, Laser induced damage

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Proceedings Article | 11 February 2008 Paper

Retinal thermal laser damage thresholds for different beam profiles and scanned exposure

Karl Schulmeister, Reinhard Gilber, Bernhard Seiser, Florian Edthofer, Johannes Husinsky, Beate Fekete, Letizia Farmer

Proceedings Volume 6844, 68441L (2008) https://doi.org/10.1117/12.768671

KEYWORDS: Safety, Laser damage threshold, Retina, Computer simulations, Image analysis, Data modeling, Gaussian beams, Laser safety, Beam shaping, Eye

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Proceedings Article | 26 March 2007 Paper

Retinal thermal damage threshold studies for multiple pulses

Karl Schulmeister, Bernhard Seiser, Florian Edthofer, Johannes Husinsky, Letizia Farmer

Proceedings Volume 6426, 642626 (2007) https://doi.org/10.1117/12.702354

KEYWORDS: Laser damage threshold, Data modeling, Computer simulations, Pulsed laser operation, Thermal modeling, Safety, Retina, Electroluminescence, Standards development, Laser optics

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SPIE Journal Paper | 1 March 2007 Open Access

Variation of laser-induced retinal injury thresholds with retinal irradiated area: 0.1-s duration, 514-nm exposures

David Lund, Peter Edsall, Bruce Stuck, Karl Schulmeister

JBO, Vol. 12, Issue 02, 024023, (March 2007) https://doi.org/10.1117/12.10.1117/1.2714810

KEYWORDS: Injuries, Eye, Retina, Laser damage threshold, Argon ion lasers, Collimation, Data modeling, Macula, Laser safety, Wavefronts

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Proceedings Article | 1 March 2006 Paper

Ex-plant retinal laser induced threshold studies in the millisecond time regime

Karl Schulmeister, Johannes Husinsky, Bernhard Seiser, Florian Edthofer, Helga Tuschl, David Lund

Proceedings Volume 6084, 60841E (2006) https://doi.org/10.1117/12.662811

KEYWORDS: Laser damage threshold, Data modeling, In vitro testing, Computer simulations, Retina, Thermal modeling, Pulsed laser operation, Safety, Eye, Scattering

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Proceedings Article | 23 February 2006 Paper

Comparison of different beam diameter definitions to characterize thermal damage of the eye

Karl Schulmeister, Reinhard Gilber, Florian Edthofer, Bernhard Seiser, Georg Vees

Proceedings Volume 6101, 61011A (2006) https://doi.org/10.1117/12.649233

KEYWORDS: Gaussian beams, Eye, Laser damage threshold, Laser safety, Standards development, Resonators, Retina, Laser beam propagation, Image analysis, Beam propagation method

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Proceedings Article | 18 April 2005 Paper

Laser-induced retinal injury thresholds: variation with retinal irradiated areas

David Lund, Karl Schulmeister, Bernhard Seiser, Florian Edthofer

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.608417

KEYWORDS: Data modeling, Thermal modeling, Injuries, Retina, Eye, Laser damage threshold, Cornea, Tissues, Medical research, Computer simulations

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Proceedings Article | 18 April 2005 Paper

The dependence of the apparent source on exposure position

Karl Schulmeister, Sandra Althanus, Ulfried Grabner, Georg Veiss

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.608423

KEYWORDS: Eye, Light emitting diodes, Charge-coupled devices, Safety, Wavefronts, Retina, Neodymium, Laser beam propagation, Gaussian beams, Hazard analysis

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Proceedings Article | 18 April 2005 Paper

Criteria for the determination of the 'thermal' retinal spot diameter

Karl Schulmeister, Bernhard Seiser, Florian Edthofer, Ulfried Grabner, Georg Veiss

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.608421

KEYWORDS: Gaussian beams, Laser safety, Resonators, Standards development, Thermal modeling, Data modeling, Eye, Laser damage threshold, Hazard analysis, Retina

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Proceedings Article | 17 May 2001 Paper

Implications of using ED-50 and probit analysis in comparing retinal injury threshold data

David Sliney, John Mellerio, Karl Schulmeister

Proceedings Volume 4246, (2001) https://doi.org/10.1117/12.426711

KEYWORDS: Injuries, Safety, Eye, Biological research, Retina, Image quality, Laser damage threshold, Laser safety, Error analysis, Gas lasers

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Proceedings Article | 17 May 2001 Paper

Concepts in dosimetry related to laser safety and optical-radiation hazard evaluation

Karl Schulmeister

Proceedings Volume 4246, (2001) https://doi.org/10.1117/12.426709

KEYWORDS: Retina, Sensors, Eye, Laser safety, Electroluminescence, Skin, Cornea, Radio optics, Standards development, Radiometry

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Proceedings Article | 17 May 2001 Paper

Modeling of uncertainty associated with dose-response curves as applied for probabilistic risk assessment in laser safety

Karl Schulmeister, Gerald Sonneck, Herbert Hoedlmoser, Frank Rattay, John Mellerio, David Sliney

Proceedings Volume 4246, (2001) https://doi.org/10.1117/12.426713

KEYWORDS: Injuries, Absorption, Eye models, Laser damage threshold, Statistical analysis, Laser safety, Monte Carlo methods, Retina, Mathematical modeling, Pulsed laser operation

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In laser safety, dose-response curves describe the probability for ocular injury as a function of ocular energy, and are often used to quantify the risk for ocular injury given a certain level of exposure to laser radiation. In principal, a dose-response curve describes the biological variation of the individual thresholds in a population. In laser safety, a log-normal cumulative distribution is generally assumed for the dose-response curve, for instance when Probit analysis is performed. The lognormal distribution is defined by two parameters, the median, called ED50, and the slope. When animal experiments are performed to obtain dose-response curves for laser induced injury, experimental uncertainty such as focussing errors as well as variability within the group of experimental animals, such as inter-individual variability of absorption of the ocular media, can influence the shape of the dose-response curve. We present simulations of uncertainties and variabilities that show that the log-normal dose-response curve as obtained in a animal experiments can grossly overestimate the probability for ocular damage for small doses. It is argued that the intrinsic slope for an individual’s dose-response curve is rather steep, even for retinal injury, however, the dose-response curve for a group or population can be broader when there is inter-individual variability of parameters which influence the threshold. The quantitative results of the simulation of the grouping of individual dose-response curves can serve as basis to correct potentially biased dose-response curves as well as to characterize the uncertainty associated with the ED50 and the slope of the dose-response curve. A probabilistic risk analysis model, which accounts for these uncertainties by using Monte-Carlo simulation, was developed for retinal laser injuries from pulsed lasers with wavelengths from 200 nm to 20 µm, and the interpretation of the results are discussed on the basis of example calculations.

Proceedings Article | 31 January 2001 Paper

Multimedia concept for laser safety trainin meeting the individual user's requirements

Roland Brandenburg, Karl Schulmeister, Darrell Seeley, Harald Bauer, Peter Koger

Proceedings Volume 4156, (2001) https://doi.org/10.1117/12.413735

KEYWORDS: Laser safety, Multimedia, Video, Laser applications, Standards development, Modes of laser operation, Laser safety equipment, Compact discs, Surgery, Navigation systems

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Showing 5 of 17 publications

Conference Committee Involvement (4)

Laser and Noncoherent Light Ocular Effects

20 January 2008 | San Jose, California, United States

Laser and Noncoherent Light Ocular Effects

21 January 2007 | San Jose, California, United States

Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment

23 January 2005 | San Jose, CA, United States

Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment

26 January 2003 | San Jose, CA, United States

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