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Compact active high-resolution imaging system

Buske, Ivo und Riede, Wolfgang (2008) Compact active high-resolution imaging system. In: Proceedings of SPIE Europe: Optics/Photonics in Security and Defence 2008. SPIE Europe: Optics/Photonics in Security and Defence 2008, 2008-09-15 - 2008-09-18, Cardiff, GB. (im Druck)

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Kurzfassung

High-resolution telescope systems used for observational tasks require sufficiently large apertures to enhance the spatial resolution. Due to the propagation through turbulent layers of the atmosphere the distorted wavefront implicates a broadening of the imaged spot and hence a loss in optical resolution. The improvement in visual resolution by applying adaptive optics has been successfully demonstrated in a mobile telescope platform. To compensate for the effects of atmospheric turbulence, a closed-loop system was developed with a bandwidth of up to 600 Hz capable to achieve a wavefront correction with a residual wavefront deformation of 50 nm RMS. A reference signal which is probing the wavefront distortion is realized with the help of a coherent laser beam emanating from the object. The developed adaptive optical system is capable of compensating phase distortions in a conjugated plane with time constants of 30 ms. Turbulence was artificially induced along the optical path by a turbulence generator. Measurements of MTF values and Strehl ratio will be presented.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Compact active high-resolution imaging system
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Buske, IvoNICHT SPEZIFIZIERT
Riede, WolfgangNICHT SPEZIFIZIERT
Datum:14 August 2008
Erschienen in:Proceedings of SPIE Europe: Optics/Photonics in Security and Defence 2008
Referierte Publikation:Ja
In ISI Web of Science:Nein
Status:im Druck
Stichwörter:adaptive optics, FSO, free space optical communication, atmospheric turbulence, high resolution imaging
Veranstaltungstitel:SPIE Europe: Optics/Photonics in Security and Defence 2008
Veranstaltungsort:Cardiff, GB
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2008-09-15 - 2008-09-18
Veranstalter :SPIE
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Laserforschung und -technologie
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Physik
Hinterlegt von: Dr.-Ing. Ivo Buske
Hinterlegt am:10 Nov 2008
Letzte Änderung:15 Jan 2010 00:23

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