Ultrashort laser ablation of PMMA and intraocular lenses

Serafetinides, AA; Makropoulou, M; Fabrikesi, E; Spyratou, E; Bacharis, C; Thomson, RR; Kar, AK

dc.contributor.author	Serafetinides, AA	en
dc.contributor.author	Makropoulou, M	en
dc.contributor.author	Fabrikesi, E	en
dc.contributor.author	Spyratou, E	en
dc.contributor.author	Bacharis, C	en
dc.contributor.author	Thomson, RR	en
dc.contributor.author	Kar, AK	en
dc.date.accessioned	2014-03-01T01:29:25Z
dc.date.available	2014-03-01T01:29:25Z
dc.date.issued	2008	en
dc.identifier.issn	0947-8396	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19259
dc.subject	Atomic Force Microscope	en
dc.subject	Azo Dye	en
dc.subject	Cataract Surgery	en
dc.subject	High Resolution	en
dc.subject	Laser Ablation	en
dc.subject	Optical Properties	en
dc.subject	Surface Modification	en
dc.subject	Ultrashort Laser Pulse	en
dc.subject	Optical Microscope	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Aberrations	en
dc.subject.other	Ablation	en
dc.subject.other	Azo dyes	en
dc.subject.other	Contact lenses	en
dc.subject.other	Laser ablation	en
dc.subject.other	Laser beams	en
dc.subject.other	Lasers	en
dc.subject.other	Lenses	en
dc.subject.other	Materials properties	en
dc.subject.other	Optical instruments	en
dc.subject.other	Optical properties	en
dc.subject.other	Pulse generators	en
dc.subject.other	Pulsed laser applications	en
dc.subject.other	Pulsed laser deposition	en
dc.subject.other	Semiconducting cadmium telluride	en
dc.subject.other	Surgery	en
dc.subject.other	Ultrashort pulses	en
dc.subject.other	Ablation experiments	en
dc.subject.other	After cataract	en
dc.subject.other	Conventional techniques	en
dc.subject.other	Laser processing	en
dc.subject.other	New materials	en
dc.subject.other	Polymer substrates	en
dc.subject.other	Ultra short laser pulses	en
dc.subject.other	Ultra-short laser ablation	en
dc.subject.other	Intraocular lenses	en
dc.title	Ultrashort laser ablation of PMMA and intraocular lenses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s00339-008-4666-0	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s00339-008-4666-0	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The use of intraocular lenses (IOLs) is the most promising method to restore vision after cataract surgery. Several new materials, techniques, and patterns have been studied for forming and etching IOLs to improve their optical properties and reduce diffractive aberrations. This study is aimed at investigating the use of ultrashort laser pulses to ablate the surface of PMMA and intraocular lenses, and thus provide an alternative to conventional techniques. Ablation experiments were conducted using various polymer substrates (PMMA samples, hydrophobic acrylic IOL, yellow azo dye doped IOL, and hydrophilic acrylic IOL consist of 25% H2O). The irradiation was performed using 100 fs pulses of 800 nm radiation from a regeneratively amplified Ti:sapphire laser system. We investigated the ablation efficiency and the phenomenology of the ablated patterns by probing the ablation depth using a profilometer. The surface modification was examined using a high resolution optical microscope (IOLs) or atomic force microscope-AFM (PMMA samples). It was found that different polymers exhibited different ablation characteristics, a result that we attribute to the differing optical properties of the materials. In particular, it was observed that the topography of the ablation tracks created on the hydrophilic intraocular lenses was smoother in comparison to those created on the PMMA and hydrophobic lens. The yellow doped hydrophobic intraocular lenses show higher ablation efficiency than undoped hydrophobic acrylic lenses. © 2008 Springer-Verlag.	en
heal.publisher	SPRINGER	en
heal.journalName	Applied Physics A: Materials Science and Processing	en
dc.identifier.doi	10.1007/s00339-008-4666-0	en
dc.identifier.isi	ISI:000258524000018	en
dc.identifier.volume	93	en
dc.identifier.issue	1	en
dc.identifier.spage	111	en
dc.identifier.epage	116	en