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Optical Engineering

Physical problems of excimer laser cornea ablation
Author(s): Zsolt Bor; Bela Hopp; Bela Racz; Gabor Szabo; Zsuzsanna Marton; Imola Ratkay; Judit Mohay; Ildiko Sueveges; Agnes Fuest
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Paper Abstract

ArF excimer laser ablation of corneal tissues (in vitro, pig) is investigated. Scanning electron microscopic analysis shows that the spatial resolution of the ablation is better than 1 μm. The etching rate and etched depth is found to be proportional to the logarithm of the laser fluence and the number of shots, respectively. To investigate the dynamic processes a laser-based, ultrafast photographic arrangement was constructed having a temporal resolution of 1 ns. The maximum speed of the shock wave generated during ablation is found to be as high as 4000 m/s. The ejection of the ablation plume with plume-front velocities in the range of 600 m/s is also observed. A new type of surface wave generated by the recoil forces of the ablated material is found. The amplitude of this surface wave can be as high as 0.4 mm.

Paper Details

Date Published: 1 October 1993
PDF: 6 pages
Opt. Eng. 32(10) doi: 10.1117/12.145357
Published in: Optical Engineering Volume 32, Issue 10
Show Author Affiliations
Zsolt Bor, JATE Univ. (Hungary)
Bela Hopp, JATE Univ. (Hungary)
Bela Racz, Jate Univ. (Hungary)
Gabor Szabo, Jate Univ. (Hungary)
Zsuzsanna Marton, Jate Univ. (Hungary)
Imola Ratkay, Szent-Gyorgyi Medical Univ. (Hungary)
Judit Mohay, Szent-Gyorgyi Medical Univ. (Hungary)
Ildiko Sueveges, Semmelweiss Medical Univ. (Hungary)
Agnes Fuest, Semmelweiss Medical Univ. (Hungary)


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