First-Order Model of Thermal Lensing in a Virtual Eye
TEXAS UNIV AT SAN ANTONIO
Pagination or Media Count:
An ABCD beam-propagation method was used to build a first-order mathematical model of a thermal lens effect from a near-infrared laser beam in water and ocular media. The model was found to fit experimental z-x scan data best when the thermo-optic coefficient dndT of liquid water at 292 K was -4.46x10-5 K-1. The physiological parameters of the human eye were simulated in a simple eye model using this fitted dndT value. Conservative model simulations for 1150 and 1318 nm laser radiation include parameter sets used in experimental ocular exposures performed by Zuchlich, et al., to illustrate the transient response of the thermal lens approaching the limits of the retinal damage thresholds for equivalent laser radiation sources.
- Anatomy and Physiology