Temperature monitoring by infrared radiation measurements during ArF excimer laser ablation with cornea

Miya Ishihara; Tsunenori Arai; Shunichi Sato; Hironori Nakano; Minoru Obara; Makoto Kikuchi

doi:10.1117/12.350017

14 June 1999 Temperature monitoring by infrared radiation measurements during ArF excimer laser ablation with cornea

Miya Ishihara, Tsunenori Arai, Shunichi Sato, Hironori Nakano, Minoru Obara, Makoto Kikuchi

Proceedings Volume 3601, Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical; (1999) https://doi.org/10.1117/12.350017
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

Abstract

We measured infrared thermal radiation from porcine cornea during various fluences ArF excimer laser ablations with 1 microsecond(s) rise time. To obtain absolute temperature by means of Stefan-Boltzman law of radiation, we carried out a collection efficiency and detective sensitivity by a pre-experiment using panel heater. We measured the time course of the thermal radiation intensity with various laser fluences. We studied the relation between the peak cornea temperature during the ablation and irradiation fluences. We found the ablation situations, i.e., sub-ablation threshold, normal thermal ablation, and over-heated ablation, may be judged by both of the measured temperature transient waveforms and peak temperature. The boundary fluences corresponding to normal thermal ablation were 90 and 160 mJ/cm². Our fast remote temperature monitoring during cornea ablation might be useful to control ablation quality/quantity of the cornea ArF laser ablation, that is PRK.

Citation Download Citation

Miya Ishihara, Tsunenori Arai, Shunichi Sato, Hironori Nakano, Minoru Obara, and Makoto Kikuchi "Temperature monitoring by infrared radiation measurements during ArF excimer laser ablation with cornea", Proc. SPIE 3601, Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical, (14 June 1999); https://doi.org/10.1117/12.350017

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