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| technical:description [2025/05/15 11:42] – [(6) Field scanning (OBJ2)] etienne | technical:description [2025/10/07 14:36] (current) – [(8-9) Broadband Imaging (BBI) filter & camera] etienne |
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| Picture of the F1 area with the polarimetric analyser installed. \\ | Picture of the F1 area with the polarimetric analyser installed. \\ |
| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:instrumentation:themis_f1_withpolarimetricanalyser.jpeg"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:instrumentation:themis_f1_withpolarimetricanalyser.jpeg" style="width:60%; height: auto;"></a></html> \\ | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:instrumentation:themis_f1_withpolarimetricanalyser.jpeg"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:instrumentation:themis_f1_withpolarimetricanalyser.jpeg" style="width:60%; height: auto;"></a></html> \\ |
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| ==== (6) Field scanning (OBJ2) ==== | ==== (6) Field scanning (OBJ2) ==== |
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| The OBJ2 movable mirror allow a fine scanning of the field of view one the Sun. This allows to move the field of view on the target without the need to move the telescope (the latter being much less precise). This scanning mirror enables displacement with increment as small as 0.0''. This would however be smaller than the seeing limits even with adaptive optics working. Typical observations uses scanning steps of the range 0.1'' to a few ''. | The OBJ2 movable mirror allow a fine scanning of the field of view one the Sun. This allows to move the field of view on the target without the need to move the telescope (the latter being much less precise). This scanning mirror enables displacement with increment as small as 0.01" arcsec. This would however be smaller than the seeing limits even with adaptive optics working. Typical observations uses scanning steps of the range 0.1" to a few arcseconds. |
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| <html><font color="#ff9900"> Users not performing sit-and-stare observations shall define the scanning properties for their observations. </font></html> | <html><font color="#ff9900"> Users not performing sit-and-stare observations shall define the scanning properties for their observations. </font></html> |
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| Simplified cartoon of THEMIS adaptive optic light-path. \\ | Simplified cartoon of THEMIS adaptive optic light-path. \\ |
| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=:results:gallery:schema:opticalpath_tao.png"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=:results:gallery:schema:opticalpath_tao.png" style="width:80%; height: auto;"></a></html> \\ | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=:science:gallery:schema:opticalpath_tao.png"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=:science:gallery:schema:opticalpath_tao.png" style="width:80%; height: auto;"></a></html> \\ |
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| Views of the BBI camera and its broadband filter. \\ | Views of the BBI camera and its broadband filter. \\ |
| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:instrumentation:bbicamera.jpg"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:instrumentation:bbicamera.jpg" style="width:90%; height: auto;"></a></html> \\ | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:instrumentation:bbicamera.jpg"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:instrumentation:bbicamera.jpg" style="width:90%; height: auto;"></a></html> \\ |
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