Image Instabilities and Polarization Crosstalk
We expand on our previous study of the impact of atmospheric seeing on polarization crosstalk, and show how the formalism that was developed in that work can be applied to treat the case of spatial modulators of polarization. Beside formally demonstrating how the problem of crosstalk is fully elimin...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc68b |
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| author | R. Casini A. G. de Wijn |
| author_facet | R. Casini A. G. de Wijn |
| author_sort | R. Casini |
| collection | DOAJ |
| description | We expand on our previous study of the impact of atmospheric seeing on polarization crosstalk, and show how the formalism that was developed in that work can be applied to treat the case of spatial modulators of polarization. Beside formally demonstrating how the problem of crosstalk is fully eliminated in such devices, we also gain insight on the meaning of polarimetric noise of temporal modulation schemes in the limit of very high modulation frequency. We also describe the problem of spectrograph instabilities, and how the spectral gradients that are naturally associated with a line spectrum feed into the problem of polarimetric errors induced by mechanical vibrations, thermal drifts, and pointing jitter. Finally, we show how this formalism can be used to estimate the contribution of polarization crosstalk to the errors on the elements of the 4 × 4 Stokes response matrix, for the purpose of producing realistic error budgets for polarimetric instrumentation. |
| format | Article |
| id | doaj-art-ed4d6397b4264105a4e3506c0766bfda |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-ed4d6397b4264105a4e3506c0766bfda2025-08-20T01:55:38ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01985216710.3847/1538-4357/adc68bImage Instabilities and Polarization CrosstalkR. Casini0https://orcid.org/0000-0001-6990-513XA. G. de Wijn1https://orcid.org/0000-0002-5084-4661HAO , NSF NCAR, P.O. Box 3000, Boulder, CO 80307-3000, USAHAO , NSF NCAR, P.O. Box 3000, Boulder, CO 80307-3000, USAWe expand on our previous study of the impact of atmospheric seeing on polarization crosstalk, and show how the formalism that was developed in that work can be applied to treat the case of spatial modulators of polarization. Beside formally demonstrating how the problem of crosstalk is fully eliminated in such devices, we also gain insight on the meaning of polarimetric noise of temporal modulation schemes in the limit of very high modulation frequency. We also describe the problem of spectrograph instabilities, and how the spectral gradients that are naturally associated with a line spectrum feed into the problem of polarimetric errors induced by mechanical vibrations, thermal drifts, and pointing jitter. Finally, we show how this formalism can be used to estimate the contribution of polarization crosstalk to the errors on the elements of the 4 × 4 Stokes response matrix, for the purpose of producing realistic error budgets for polarimetric instrumentation.https://doi.org/10.3847/1538-4357/adc68bSpectropolarimetry |
| spellingShingle | R. Casini A. G. de Wijn Image Instabilities and Polarization Crosstalk The Astrophysical Journal Spectropolarimetry |
| title | Image Instabilities and Polarization Crosstalk |
| title_full | Image Instabilities and Polarization Crosstalk |
| title_fullStr | Image Instabilities and Polarization Crosstalk |
| title_full_unstemmed | Image Instabilities and Polarization Crosstalk |
| title_short | Image Instabilities and Polarization Crosstalk |
| title_sort | image instabilities and polarization crosstalk |
| topic | Spectropolarimetry |
| url | https://doi.org/10.3847/1538-4357/adc68b |
| work_keys_str_mv | AT rcasini imageinstabilitiesandpolarizationcrosstalk AT agdewijn imageinstabilitiesandpolarizationcrosstalk |