Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | European Conference on Biomedical Optics, ECBO 2011 |
| Publikationsstatus | Veröffentlicht - 2011 |
| Extern publiziert | Ja |
| Veranstaltung | European Conference on Biomedical Optics, ECBO 2011 - Munich, Deutschland Dauer: 22 Mai 2011 → 26 Mai 2011 |
Publikationsreihe
| Name | Optics InfoBase Conference Papers |
|---|---|
| ISSN (elektronisch) | 2162-2701 |
Abstract
Femtosecond laser induced optical breakdown allows for high-precision cutting of transparent materials with low energy deposit and little peripheral damage for applications in micromachining and minimally invasive medical surgery. Little peripheral damage is especially important for laser incisions in the posterior eye due to the vicinity to the retina. When applying laser pulses through the anterior eye, aberrations are introduced to the wave front, which cause a distortion of the focal volume and an increase in required pulse energy for tissue manipulation through photodisruption. To decrease the pulse energy, aberrations need to be corrected to restore a diffraction limited focus. In this work, the influence of an aberration correction using adaptive optics on the required pulse energy for an optical breakdown was investigated. The aberrations were introduced in an eye model using HEMA as eye tissue substitute and corrected in an optical setup including a deformable mirror and a Hartmann-Shack-Sensor. The laser pulses were focused by a plano-convex lens and the induced impact was compared for the aberrated and the corrected case. The pulse energy required to obtain an effect was reduced when correcting for aberrations. Therefore, adaptive optics can reduce the risk for potential peripheral damage during ophthalmic surgery.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Instrumentierung
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
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European Conference on Biomedical Optics, ECBO 2011. 2011. 80921E (Optics InfoBase Conference Papers).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Focal spot shaping for femtosecond laser pulse photodisruption through turbid media
AU - Hansen, Anja
AU - Ripken, Tammo
AU - Heisterkamp, Alexander
PY - 2011
Y1 - 2011
N2 - Femtosecond laser induced optical breakdown allows for high-precision cutting of transparent materials with low energy deposit and little peripheral damage for applications in micromachining and minimally invasive medical surgery. Little peripheral damage is especially important for laser incisions in the posterior eye due to the vicinity to the retina. When applying laser pulses through the anterior eye, aberrations are introduced to the wave front, which cause a distortion of the focal volume and an increase in required pulse energy for tissue manipulation through photodisruption. To decrease the pulse energy, aberrations need to be corrected to restore a diffraction limited focus. In this work, the influence of an aberration correction using adaptive optics on the required pulse energy for an optical breakdown was investigated. The aberrations were introduced in an eye model using HEMA as eye tissue substitute and corrected in an optical setup including a deformable mirror and a Hartmann-Shack-Sensor. The laser pulses were focused by a plano-convex lens and the induced impact was compared for the aberrated and the corrected case. The pulse energy required to obtain an effect was reduced when correcting for aberrations. Therefore, adaptive optics can reduce the risk for potential peripheral damage during ophthalmic surgery.
AB - Femtosecond laser induced optical breakdown allows for high-precision cutting of transparent materials with low energy deposit and little peripheral damage for applications in micromachining and minimally invasive medical surgery. Little peripheral damage is especially important for laser incisions in the posterior eye due to the vicinity to the retina. When applying laser pulses through the anterior eye, aberrations are introduced to the wave front, which cause a distortion of the focal volume and an increase in required pulse energy for tissue manipulation through photodisruption. To decrease the pulse energy, aberrations need to be corrected to restore a diffraction limited focus. In this work, the influence of an aberration correction using adaptive optics on the required pulse energy for an optical breakdown was investigated. The aberrations were introduced in an eye model using HEMA as eye tissue substitute and corrected in an optical setup including a deformable mirror and a Hartmann-Shack-Sensor. The laser pulses were focused by a plano-convex lens and the induced impact was compared for the aberrated and the corrected case. The pulse energy required to obtain an effect was reduced when correcting for aberrations. Therefore, adaptive optics can reduce the risk for potential peripheral damage during ophthalmic surgery.
KW - Aberrations
KW - Adaptive optics
KW - Femtosecond laser
KW - Laser beam shaping
KW - Laser surgery
KW - Ophthalmology
KW - Optical breakdown
KW - Photodisruption
UR - http://www.scopus.com/inward/record.url?scp=84893530100&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84893530100
SN - 9780819486837
T3 - Optics InfoBase Conference Papers
BT - European Conference on Biomedical Optics, ECBO 2011
T2 - European Conference on Biomedical Optics, ECBO 2011
Y2 - 22 May 2011 through 26 May 2011
ER -