
Proceedings Paper
Visualization of thermal lensing induced image distortion using Zemax ray tracing and BTEC thermal modelingFormat | Member Price | Non-Member Price |
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Paper Abstract
In recent years, several studies have been investigating the impact of thermal lensing in ocular media on the
visual function. These studies have shown that when near-infrared (NIR) laser energy (1319 nm) is introduced
to a human eye, the heating of the eye can be sufficient to alter the index of refraction of the media leading
to transient changes in the visible wavefront through an effect known as thermal lensing, while remaining at
a safe level. One of the main limitations of experimentation with human subjects, however, is the reliance on
a subject’s description of the effect, which can vary greatly between individuals. Therefore, a computational
model was needed that could accurately represent the changes of an image as a function of changes in the index
of refraction. First, to model changes in the index of refraction throughout the eye, a computational thermal
propagation model was used. These data were used to generate a comprehensive ray tracing model of the human
eye using Zemax ( Radiant Zemax Inc, Redmond WA) via a gradient lens surface. Using this model, several
different targets have been analyzed which made it possible to calculate real-world visual acuity so that the effect
of changes in the index of refraction could be related back to changes in the image of a visual scene.
Paper Details
Date Published: 15 February 2013
PDF: 9 pages
Proc. SPIE 8579, Optical Interactions with Tissue and Cells XXIV, 85790K (15 February 2013); doi: 10.1117/12.2001168
Published in SPIE Proceedings Vol. 8579:
Optical Interactions with Tissue and Cells XXIV
E. Duco Jansen; Robert J. Thomas, Editor(s)
PDF: 9 pages
Proc. SPIE 8579, Optical Interactions with Tissue and Cells XXIV, 85790K (15 February 2013); doi: 10.1117/12.2001168
Show Author Affiliations
Erica L. Towle, NRC Research Associate Program (United States)
Univ. of Texas at Austin (United States)
Clifton D. Clark III, Fort Hays State Univ. (United States)
TASC, Inc. (United States)
Michelle T. Aaron, Air Force Research Lab. (United States)
Univ. of Texas at Austin (United States)
Clifton D. Clark III, Fort Hays State Univ. (United States)
TASC, Inc. (United States)
Michelle T. Aaron, Air Force Research Lab. (United States)
Andrew K. Dunn, The Univ. of Texas at Austin (United States)
Ashley J. Welch, Univ. of Texas at Austin (United States)
Robert J. Thomas, Air Force Research Lab. (United States)
Ashley J. Welch, Univ. of Texas at Austin (United States)
Robert J. Thomas, Air Force Research Lab. (United States)
Published in SPIE Proceedings Vol. 8579:
Optical Interactions with Tissue and Cells XXIV
E. Duco Jansen; Robert J. Thomas, Editor(s)
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