Efficient and damage-free ultrashort pulsed laser cutting of polymer intraocular lens implants

Journal article
(Original article)


Publication Details

Author(s): Heberle J, Häfner T, Schmidt M
Journal: CIRP Annals - Manufacturing Technology
Publication year: 2018
Volume: 67
Journal issue: 1
Pages range: 197-200
ISSN: 0007-8506
eISSN: 1726-0604
Language: English


Abstract

Ophthalmic intraocular lenses are conventionally machined by diamond tools. A promising alternative approach is contour cutting by ultrashort pulsed laser micromachining. To improve process knowledge, a parametric study of picosecond and femtosecond laser machining of medical grade hydrophilic copolymers and PMMA is carried out. Material removal rates and machining quality with respect to main process parameters are determined. Reasons for chipping and formation of heat affected zones are identified and an optimized process strategy is derived. By choosing a defined pulse overlap, heat accumulation is kept minimal while increasing absorptivity through incubation avoids chipping.


FAU Authors / FAU Editors

Häfner, Tom
Lehrstuhl für Photonische Technologien
Heberle, Johannes
Lehrstuhl für Photonische Technologien
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien


Additional Organisation
Erlangen Graduate School in Advanced Optical Technologies


How to cite

APA:
Heberle, J., Häfner, T., & Schmidt, M. (2018). Efficient and damage-free ultrashort pulsed laser cutting of polymer intraocular lens implants. CIRP Annals - Manufacturing Technology, 67(1), 197-200. https://dx.doi.org/10.1016/j.cirp.2018.04.095

MLA:
Heberle, Johannes, Tom Häfner, and Michael Schmidt. "Efficient and damage-free ultrashort pulsed laser cutting of polymer intraocular lens implants." CIRP Annals - Manufacturing Technology 67.1 (2018): 197-200.

BibTeX: 

Last updated on 2019-05-01 at 23:10