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Interferometric Characterisation of Path Length Errors Resulting from Mirror Surface Topography with Sub-nm Reproducibility

Kögel, Harald and Gohlke, Martin and Pijnenburg, Joep and Gerardi, Domenico and Schuldt, Thilo and Johann, Ulrich and Braxmaier, Claus and Weise, Dennis (2012) Interferometric Characterisation of Path Length Errors Resulting from Mirror Surface Topography with Sub-nm Reproducibility. 9th LISA Symposium, 21.-25.05.2012, Paris.

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Abstract

We present the results of our experimental characterisation of path length errors, caused by beamwalk over the surface topography of laser mirrors. These path length errors can have a major influence on the accuracy of the LISA measurement instrument in Astrium’s alternative payload concept with In-Field Pointing. Our measurement setup uses a highly sensitive heterodyne interferometer for measuring the path length error amplitudes, generated by the topography of a moving, λ/10 test mirror.

Item URL in elib:https://elib.dlr.de/103446/
Document Type:Conference or Workshop Item (Speech)
Title:Interferometric Characterisation of Path Length Errors Resulting from Mirror Surface Topography with Sub-nm Reproducibility
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kögel, Haraldharald.koegel (at) astrium.eads.netUNSPECIFIED
Gohlke, MartinDLR-RY, BremenUNSPECIFIED
Pijnenburg, Joep3TNO Opto Mechatronics, 2600 AD Delft, The NetherlandsUNSPECIFIED
Gerardi, DomenicoAstrium GmbH–Satellites, 88039 Friedrichshafen, GermanyUNSPECIFIED
Schuldt, ThiloDLR-RY, BremenUNSPECIFIED
Johann, UlrichAstrium FriedrichshafenUNSPECIFIED
Braxmaier, Clausclaus.braxmaier (at) dlr.deUNSPECIFIED
Weise, DennisAstrium GmbH–Satellites, 88039 Friedrichshafen, GermanyUNSPECIFIED
Date:2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:LISA, mirror characterization, heterodyne interferometry, in-field pointing
Event Title:9th LISA Symposium
Event Location:Paris
Event Type:international Conference
Event Dates:21.-25.05.2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systems Enabling Technologies
Deposited By: Hüls, Simone
Deposited On:15 Mar 2016 10:01
Last Modified:15 Mar 2016 10:01

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