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High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses
Daniel Sola1,2, Rafael Cases3
1Institut für Fertigungstechnik, Technische Universität Dresden, 01069 Dresden, Germany.
Polymers
|January 24, 2020
Summary
Femtosecond laser pulses precisely inscribed patterns on acrylic intra-ocular lenses (IOL). This study analyzed processing parameters and material changes for advanced IOL fabrication.
Area of Science:
- Materials Science and Engineering
- Optical Engineering
- Biomedical Engineering
Background:
- Acrylic intra-ocular lenses (IOLs) are crucial for vision correction.
- Advanced manufacturing techniques are needed to enhance IOL functionality.
- Femtosecond laser processing offers high precision for micro- and nano-fabrication.
Purpose of the Study:
- To investigate the femtosecond laser processing of acrylic IOLs.
- To analyze the inscription of periodic patterns on and within acrylic substrates.
- To understand the influence of processing parameters on material modifications.
Main Methods:
- Utilized an ultra-compact, air-cooled femtosecond diode laser (250 fs, 520 nm, 63 MHz).
- Employed Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), and micro-Raman Spectroscopy for material analysis.
- Conducted diffractive characterization to assess optical properties.
Main Results:
- Successfully inscribed linear periodic patterns on and inside acrylic substrates.
- Identified correlations between processing parameters, optical absorption, and material changes.
- Quantified compositional and microstructural modifications in laser-processed areas.
- Evaluated changes in refractive index and 1st-order diffractive efficiency.
Conclusions:
- Femtosecond laser processing is a viable method for creating intricate patterns on acrylic IOLs.
- The study provides insights into controlling material properties for customized IOL designs.
- This research contributes to the development of next-generation IOLs with enhanced optical functionalities.
