PHYSICAL PROBLEMS OF EXCIMER-LASER CORNEA ABLATION

被引：17

作者：

BOR, Z

HOPP, B

RACZ, B

SZABO, G

MARTON, Z

RATKAY, I

MOHAY, J

SUVEGES, I

FUST, A

机构：

[1] ST GYORGYI MED UNIV,OPHTHALMOL CLIN,H-6720 SZEGED,HUNGARY

[2] SEMMELWEIS UNIV MED,OPHTHALMOL CLIN,H-1083 BUDAPEST,HUNGARY

来源：

OPTICAL ENGINEERING | 1993年 / 32卷 / 10期

关键词：

EXCIMER LASERS; PHOTOABLATION; CORNEAL SURGERY;

D O I：

10.1117/12.145357

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 mum. 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.

引用

页码：2481 / 2486

页数：6