Femtosecond pulsed laser ablation of polyimide at oblique angles for medical applications.
Femtosecond pulsed laser ablation of polyimide at oblique angles for medical applications.
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DOI：
10.1364/ao.54.007413
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发表时间：
2015-08
期刊：
影响因子：
1.9
通讯作者：
Bibi Safia Haq;H. U. Khan;K. Alam;Mian Mateenullah;Shehnaz Attaullah;I. Zari
中科院分区：
文献类型：
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作者：
Bibi Safia Haq;H. U. Khan;K. Alam;Mian Mateenullah;Shehnaz Attaullah;I. Zari
我们报道了用超短飞秒激光脉冲对聚酰亚胺Kapton HN薄膜进行表面改性的烧蚀结果。测定了75μm厚的聚酰亚胺薄膜在不同垂直和水平入射角度(0°、20°、30°、45°和50°)下的辐照阈值注量。斜角消融的研究是因为在激光手术中发现了这种与眼睛的相互作用，这需要扫描光束，了解这种相互作用对于治疗各种眼病非常重要。在本研究中，聚酰亚胺被认为是角膜雕刻的模型。研究了利用超短飞秒激光脉冲在不对周围环境造成热损害的情况下对样品进行高精度的图案化。描述了入射角与烧蚀阈值注量、阈值能量和束流半径之间的关系。此外，还研究了不同厚度聚酰亚胺的阈值能量和阈值通量。
We report the ablation results for surface modification of polyimide Kapton HN foils using ultrashort femtosecond laser pulses. The modification threshold fluences for 75 μm thick films of polyimide were determined at different incident angles (0°, 20°, 30°, 45°, and 50°) for vertical and horizontal diameters. Ablation at oblique angles was investigated as such interactions are found during laser procedures with the eye that require scanning of the beam and are very important to know for the treatment of various eye diseases. Polyimide, in this study, was considered as a model for corneal sculpting. Use of ultrashort femtosecond laser pulses for high-precision patterning of the sample, without thermal damage to the surroundings, has been investigated. The relationship between the incidence angle with ablation threshold fluence, threshold energy, and beam radius are described. Also, threshold energies and threshold fluences for different thicknesses of polyimide were investigated.