We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm2. The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.
|出版ステータス||Published - 2000|
|イベント||Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical - San Jose, CA, USA|
継続期間: 2000 1月 22 → 2000 1月 27
ASJC Scopus subject areas
- コンピュータ サイエンスの応用