2313724 – Adaptive Optics

Adaptive optics is a technology of correcting the effect of atmospheric turbulence on images of space objects and on laser beams propagating through random and highly aberrated media such as turbulence, tissue, and the inside of the human eye, to name just a few applications. The course will familiarize the students with theoretical basics of light propagation through random media, principles of wavefront sensing and reconstruction, as well as wavefront correction with deformable mirrors. The students will also receive solid introduction to statistical optics, the Kolmogorov theory of turbulence, practical aspects of turbulence simulation and modelling of adaptive optics.

Allgemeine Informationen

Wichtige Informationen
The first lecture will take place on December 3rd.

The students will:

get familiar with Fourier description of imaging through aberrated optical systems and random media,

understand the description of aberrations through Zernike modes,

learn how to analytically compute the effects of turbulence on various optical observables such as image/beam motion, temporal power spectra, Zernike modes, scintillation, etc.,

understand the effect of noise on various quantities and metrics pertinent to the design of adaptive optical systems,

understand the advantages and disadvantages of various schemes for wavefront sensing and correction,

learn how to simulate and design simple adaptive optics systems.
Kursprogramm
1. Theory of turbulence (covariances, structure functions, power spectra, inertial range, dimensional argument of Kolmogorov)
2. Fourier optics (point-spread function, modulation transfer function)
3. Statistical optics (characteristic function, probability density function)
4. Sources and description of aberrations (Zernike polynomials, orthogonality, Marechal criterion)
5. Adaptive optics systems (open- and closed-loop systems, error budgets, tip-tilt correction)
6. Wavefront sensing (Shack-Hartmann wavefront sensor, wavefront reconstruction, wavefront-sensorless AO)
7. Wavefront correction (tip-tilt mirrors, deformable mirrors, piezoelectric effect, microelectromechanical systems, electrostatic actuation)
8. Simulation of adaptive optical systems (analytic vs. end-to-end modelling)
9. Propagation of laser beams through atmospheric turbulence (Gaussian beams, Rytov theory, scintillation index, beam wander)
10. Modelling of free-space optical communication systems (aperture averaging, mean signal-to-noise ratio, false-alarm rate and fade probability, bit error-rate)
Zielgruppe
The students will:

get familiar with Fourier description of imaging through aberrated optical systems and random media,

understand the description of aberrations through Zernike modes,

learn how to analytically compute the effects of turbulence on various optical observables such as image/beam motion, temporal power spectra, Zernike modes, scintillation, etc.,

understand the effect of noise on various quantities and metrics pertinent to the design of adaptive optical systems,

understand the advantages and disadvantages of various schemes for wavefront sensing and correction,

learn how to simulate and design simple adaptive optics systems.

Veranstaltungsdaten

Dozent(en)
Dr. Szymon Gladysz
SWS
2
Credits
3
Start
3. Dez 2024
Ende
18. Feb 2025
Veranstaltungsart
Vorlesung
Ort
Gebäude / Building 30.41 Rudolf-Criegee-Hörsaal https://www.google.de/maps/place/Fritz-Haber-Weg,+76131+Karlsruhe/@49.0123267,8.4127413,18z/data=!3m1!4b1!4m5!3m4!1s0x4797063671c67503:0x457
Termin
Tuesdays / Dienstags, 14:00 - 15:30
Zyklus
wöchtl.

Zusammenfassung

Adaptive optics is a technology of correcting the effect of atmospheric turbulence on images of space objects and on laser beams propagating through random and highly aberrated media such as turbulence, tissue, and the inside of the human eye, to name just a few applications. The course will familiarize the students with theoretical basics of light propagation through random media, principles of wavefront sensing and reconstruction, as well as wavefront correction with deformable mirrors. The students will also receive solid introduction to statistical optics, the Kolmogorov theory of turbulence, practical aspects of turbulence simulation and modelling of adaptive optics.

Allgemein

Sprache
Englisch
Copyright
This work has all rights reserved by the owner.

Kontakt

Name
Dr. Szymon Gladysz
Zuständigkeit
Lecturer
Telefon
+49 7243 992 120
E-Mail
kontakt-adaptive-optik@iosb.fraunhofer.de

Verfügbarkeit

Zugriff
Unbegrenzt – wenn online geschaltet
Aufnahmeverfahren
Sie können diesem Kurs direkt beitreten.
Zeitraum für Beitritte
Unbegrenzt
Veranstaltungszeitraum
3. Dez 2024, 14:00 - 18. Mär 2025, 14:40

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Objekt-ID
3217158