Dynamic behavior of photoablation products of corneal tissue in the mid-IR: a study with FELIX
Dynamic behavior of photoablation products of corneal tissue in the mid-IR: a study with FELIX
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中红外角膜组织光消融产品的动态行为：与 FELIX 的研究
DOI：
10.1007/s003400050595
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
B. Jean
中科院分区：
文献类型：
--
作者：
J. Auerhammer;R. Walker;A. V. D. van der Meer;B. Jean
2.研究了烧蚀云的扩展范围、烧蚀粒子的初始速度和动量、烧蚀阈值、烧蚀质量和粒子尺寸等动力学参数。烧蚀羽流是可见的频闪技术。对于3.1 J/cm 2的注量，从羽流的延伸推导出喷射粒子的平均初始速度为120-400 m/s。使用灵敏的摆锤测量反冲动量，得到的值在0.5和2.0 mm g/s之间。所有测量的性质都与光谱测定的角膜α角膜的吸收系数有关。在蛋白质吸收高的情况下（λ=6.2和6.5 μm），消融质量、速度和反冲动量的行为与α角膜一致。首次观察到了脉冲间烧蚀羽流的变化。这些，以及颗粒大小，不仅取决于吸收系数，而且还取决于主要吸收剂。
2. Dynamic parameters such as the extension of the ablation cloud, the initial velocity and momentum of the ablated particles as well as the ablation threshold, the ablated mass, and the particle size were investigated. The ablation plume was made visible with a stroboscopic technique. For a fluence of 3.1 J/cm2the average initial velocity of the ejected particles was deduced from the extension of the plume to range from 120–400 m/s. Measurements of the recoil momentum using a sensitive pendulum led to values between 0.5 and 2.0 mm g/s. All measured properties were related to the spectroscopically determined absorption coefficient of cornea αcornea. Where absorption due to proteins is high (at λ=6.2 and 6.5 μm), ablated mass, velocity and recoil momentum behave according to αcornea. For the first time, variations of the ablation plume from pulse to pulse were observed. Those, as well as the particle size, not only depend on the absorption coefficient, but also on the predominant absorber.