A5060103436- Ocular and Laser Science Research
- Advanced Optical Sensing Technologies
- Laser Material Processing Techniques
- Retinal Development and Disorders
- Visual perception and processing mechanisms
- Connexins and lens biology
- Skin Protection and Aging
- Impact of Light on Environment and Health
- Infrared Thermography in Medicine
- Circadian rhythm and melatonin
- Thermoregulation and physiological responses
- Traumatic Ocular and Foreign Body Injuries
- Laser Design and Applications
- Semiconductor Lasers and Optical Devices
- Welding Techniques and Residual Stresses
- Air Quality and Health Impacts
- Contact Dermatitis and Allergies
- Indoor Air Quality and Microbial Exposure
- Infrared Target Detection Methodologies
- Psychological and Temporal Perspectives Research
- Color Science and Applications
- Systemic Sclerosis and Related Diseases
- Health, Environment, Cognitive Aging
- Spectroscopy and Laser Applications
- Advanced Optical Imaging Technologies
Seibersdorf Laboratories (Austria)
2013-2024
Robert Bosch (Germany)
2017-2020
Public Health England
2019
SimulConsult
2019
Barco (Belgium)
2017
Schott (Germany)
2017
Technical University of Munich
2017
Beiersdorf (Germany)
2013
Allgemeine Unfallversicherungsanstalt
1997-2013
Austrian Institute of Technology
2002-2009
* ICNIRP, c/o BfS—G. Ziegelberger, Ingolstaedter Landstr. 1, 85764 Oberschleissheim, Germany. For correspondence contact G. Ziegelberger at the above address, or email [email protected]. (Manuscript accepted 3 February 2010)
The derivations of human exposure limits for laser radiation rely heavily upon experimental ocular injury studies. are derived by committees ophthalmic experts through a review all available threshold data and an understanding mechanisms laser/tissue interaction. A major point discussion in this derivation process relates to the level uncertainty injury. An indication slope transformed dose-response curve, or "probit plot" data. most cited on probit plot is that represents 50% probability...
Excised bovine eyes are used as models for threshold determination of 532-nm laser-induced thermal damage the retina in pulse duration regime 100 micros to 2 s varying laser spot size diameters. The thresholds determined by fluorescence viability staining compare well with prediction an extended Thompson-Gerstman computer model. Both published Rhesus monkey data. A previously unknown variation dependence is seen different durations, which allows a more complete understanding retinal damage....
Background/Purpose: Disseminated granuloma annulare is a benign granulomatous skin disease of unknown etiology. Recently, UVA1 (340–400 nm) phototherapy has been found effective in small series four patients. The purpose this two‐center study was to determine the rate and duration clinical response larger cohort 20 patients with disseminated annulare. Methods: Twenty long‐standing, stable (median 42 months, 95% CI 23–105) underwent phototherapy. Sixteen were treated high‐dose regimen single...
The retinal injury threshold dose for laser exposure varies as a function of the irradiated area on retina. Zuclich reported thresholds laser-induced from 532 nm, nanosecond-duration exposures that varied square diameter We report data 0.1-s-duration to 514-nm, argon irradiation. Thresholds macular at 24 h are 1.05, 1.40, 1.77, 3.58, 8.60, and 18.6 mJ irradiance diameters 20, 69, 136, 281, 562, 1081 µm, respectively. These vary area. relationship between is duration. this experiment show...
Laser etching of transparent conducting films fluorine-doped tin oxide and indium-tin has been investigated using an excimer laser at 248 nm. The etch depth per pulse as a function fluence was measured compared with the predictions explicit finite difference thermal model. Direct patterning these demonstrated. sheet resistance 50-μm-wide channel formed by ablation value for original film.
Abstract The acceptance and usability of personal protection against solar UV radiation was evaluated in a field study with group tinsmiths Austria. protective measures (PPM) tested involved four categories: shirts, headwear, sunglasses topically applied sunscreens; at least six different products per category were tested. Recommendations for the “ideal” shirt, pair topical sunscreen are given based on data from questionnaires, i.e., point view workers, independently actual physical level...
A computer model was developed for calculating the intraocular energy producing a thermally induced retinal threshold lesion upon exposure to optical radiation. The parameters were adjusted best fit levels reported in literature in-vivo, with nonhuman primates at wavelengths between 413 and 1338 nm, durations 100 μs 50 min, various spot sizes exposures paramacular or macular sites. Comparison of calculated thresholds all consistent experimental results published over past years shows good...
The damage mechanism for near-infrared radiation (IRR) induced cataract is unclear. Both a photochemical and thermal were suggested. current paper aims to elucidate effect based on investigation of irradiance-exposure time reciprocity. Groups 20 rats unilaterally exposed 96-W/cm2 IRR at 1090 nm within the dilated pupil accumulating 57, 103, 198, 344 kJ/cm2, respectively. Temperature was recorded limbus eye. Seven days after exposure, lenses macroscopically imaged light scattering...
Laser exposure limits as promulgated by the International Commission on Non-Ionizing Radiation Protection are compared to relevant experimental animal injury data for cornea and lens in nanosecond microsecond pulse duration regime both ultraviolet (UV) infrared spectral ranges. In UV range, thermal photochemical damage mechanisms compete thresholds must be carefully distinguished a function of wavelength duration. The with levels inferred from CO2 radiation it is shown that reduction factors...
Excised bovine retinas were used as model for threshold determination of laser induced thermal damage in the pulse regime 1 ms to 655 a range spot size diameters. The thresholds determined by fluorescence viability staining compare very well with prediction models. Both models published and new Rhesus monkey data. A distinctive dependence on diameter different duration was found which indicates that current (ICNIRP, ANSI IEC) exposure limits large spots can be increased this regime. time...