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Optical quality membrane mirror

Seitz, Stefan und Buske, Ivo und Börret , Rainer (2009) Optical quality membrane mirror. Masterarbeit, Hochschule Aalen.

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This thesis describes the development of an optical quality membrane mirror with aberrations smaller than the correction limit of an adaptive optical mirror. The shape is generated by a pressure difference. A small overview about historical and state-of-the-art membrane mirrors is given. Hencky’s respec-tively Campbell’s approximations are the most used theories for describing the deformation of a thin membrane subjected to uniform pressure. The main wavefront error is spherical aberration. Shape correction is possible by varying design-parameters or by using adaptive optical systems. Suitable materials are polyester and polyimide. A solar safety film is used for our membrane mirrors. Mechanical and optical properties were determined with experiments. Because the prototype DLR-AOS per-formed poorly, the influence of the initial tension was analyzed. The component creating this tension was replaced by a more satisfying pellicle frame adjustable in 5 axes. The point spread function im-proved significantly. A flexible experimental setup for measuring the deviation from a reference sphere with interference respectively Shack-Hartmann-sensor was designed. Integration of the adap-tive mirror is prepared. The wavefront deviation is within 10 λ (λ = 633 nm) and very smooth. 6 λ are achievable by adjusting the pellicle frame. The dominant wavefront errors are astigmatism and coma caused by non-ideal boundary conditions

Dokumentart:Hochschulschrift (Masterarbeit)
Titel:Optical quality membrane mirror
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
Buske, IvoIvo.Buske@dlr.deNICHT SPEZIFIZIERT
Datum:31 März 2009
Referierte Publikation:Nein
In Open Access:Nein
In ISI Web of Science:Nein
Stichwörter:membrane mirror, pellicle, aberrations
Institution:Hochschule Aalen
Abteilung:Zentrum für Optische Technologien
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Laserforschung und -technologie (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Physik
Hinterlegt von: Buske, Dr.-Ing. Ivo
Hinterlegt am:07 Dez 2009 12:06
Letzte Änderung:07 Dez 2009 12:06

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