Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorRamya, M. Anche-
dc.contributor.authorPackham, Chris-
dc.contributor.authorAnupama, G. C-
dc.contributor.authorSankarasubramanian, K-
dc.contributor.authorMaheswar, G-
dc.contributor.authorManoj, P-
dc.identifier.citationProceedings of the SPIE, Vol.10702, pp. 1070298-1- 1070298-9en_US
dc.descriptionRestricted Accessen_US
dc.description.abstractThe Thirty Meter Telescope (TMT) is a proposed future generation telescope which will be located on either Maunakea, Hawaii or La Palma in the Canary islands. A thermal-infrared (TIR) imager and spectrometer (MICHI) combined with an adaptive optics system is being investigated as a possible second-generation instrument for this telescope. MICHI has been designed to also have a polarimetry capability in both imaging and low dispersion spectroscopic modes. Using polarization ray tracing in Zemax, we have estimated the instrumental polarization (IP) and crosstalk introduced at the focus of the near- and mid-infrared imaging system. In our calculations, we find that the IP varies from 1.0-0.54% and 0.54-0.42%, whereas the polarization crosstalk varies between 25-4% and 4-0.7%, in the near and TIR regions respectively at the instrument port of MICHI. These values of IP and crosstalk may cause problems during the high absolute accuracy polarization observations. Here we present the polarization effects for the imaging system of MICHI and it impacts on the polarization observations.en_US
dc.publisherSPIE--The International Society for Optical Engineeringen_US
dc.rights© SPIE--The International Society for Optical Engineering-
dc.subjectInstrumental polarizationen_US
dc.subjectThirty-Meter Telescopeen_US
dc.titleThe estimation of the instrumental polarization and crosstalk at the focus of the mid-infrared imaging system for the Thirty Meter Telescopeen_US
Appears in Collections:IIAP Publications

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.