Design and Modeling of the Off-Axis Parabolic Deformable (OPD) Mirror Laboratory

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dc.contributor.authorSubedi, Hari
dc.contributor.authorJuanola-Parramon, Roser
dc.contributor.authorGroff, Tyler
dc.date.accessioned2019-10-14T14:30:32Z
dc.date.available2019-10-14T14:30:32Z
dc.date.issued2019-08-12
dc.descriptionSPIE Optics + Photonics; August 11, 2019 - August 15, 2019; San Diego, CA; United Statesen_US
dc.description.abstractCoronagraph-equipped direct imaging missions need an active wavefront control system to cancel out the optical aberrations that degrade the performance of the coronagraphs. A fast steering mirror is used to control Line-of-Sight (LoS) pointing error caused by the telescope jitter. In addition to controlling other low-order aberrations such as astigmatism and coma, high stroke, high actuator density deformable mirrors (DMs) are also used to control the electric field at the required high spatial frequencies. We are designing a testbed to verify a different deformable architecture, where the powered optic in the optical train are controllable and have lower actuator count compared to the existing DMs with flat nominal surfaces. This simplifies the packaging issue for space missions and reduces both cost and risk of having the entire coronagraph instrument's performance depending on one or two high-actuator count DMs. The testbed would also be capable of testing different low-order wavefront sensing algorithms, which focuses in the near-term on a new adaptive Kalman filtering and gradient decent method to estimate the harmonic LoS errors that affect space telescopes. In long run, we would test different machine learning techniques to estimate low-order aberrations and non-linear algorithms for digging the region of high contrast called the dark holes (DH).en_US
dc.description.sponsorshipFinancial Sponsor: NASA Goddard Space Flight Center; 551.F Code 551.F; Greenbelt, MD, United States Meeting Sponsor: International Society for Optical Engineering; Bellingham, WA, United States Contract/Grant/Task Num: 80GSFC17M0002en_US
dc.description.urihttps://ntrs.nasa.gov/search.jsp?R=20190029123en_US
dc.format.extent18 pagesen_US
dc.genrepresentations (communicative events)en_US
dc.identifierdoi:10.13016/m2brch-tzgm
dc.identifier.citationSubedi, Hari; Juanola-Parramon, Roser; Groff, Tyler; Design and Modeling of the Off-Axis Parabolic Deformable (OPD) Mirror Laboratory; NASA Technical Reports Server; https://ntrs.nasa.gov/search.jsp?R=20190029123;en_US
dc.identifier.urihttp://hdl.handle.net/11603/15858
dc.language.isoen_USen_US
dc.publisherSPIEen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)en_US
dc.relation.ispartofUMBC Faculty Collectionen_US
dc.relation.ispartofseriesGSFC-E-DAA-TN;71185
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.subjectABERRATIONen_US
dc.subjectACTUATORSen_US
dc.subjectALGORITHMSen_US
dc.subjectCORONAGRAPHSen_US
dc.subjectDEFORMABLE MIRRORSen_US
dc.subjectERROR ANALYSISen_US
dc.subjectIMAGING TECHNIQUESen_US
dc.subjectLINE OF SIGHTen_US
dc.subjectMACHINE LEARNINGen_US
dc.subjectRISK ASSESSMENTen_US
dc.subjectWAVE FRONTSen_US
dc.subjectSPACE MISSIONSen_US
dc.subjectOPTICSen_US
dc.subjectDETECTORSen_US
dc.titleDesign and Modeling of the Off-Axis Parabolic Deformable (OPD) Mirror Laboratoryen_US
dc.typeTexten_US

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