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

Heberle J, Häfner T, Schmidt M (2018)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2018

Journal

CIRP Annals - Manufacturing Technology Elsevier

Book Volume: 67

Pages Range: 197-200

Journal Issue: 1

DOI: 10.1016/j.cirp.2018.04.095

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.

Authors with CRIS profile

Johannes Heberle Lehrstuhl für Photonische Technologien (LPT) Tom Häfner Lehrstuhl für Photonische Technologien (LPT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies (SAOT)

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://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: Download