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| technical:description [2025/03/24 17:19] – [(14) Spectral cameras] etienne | technical:description [2025/03/24 17:36] (current) – [(14) Spectral cameras] etienne |
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| The THEMIS spectrograph is an essential block of the THEMIS instrumentation that enable the formation of the solar spectrum and its detailed analysis. | The THEMIS spectrograph is an essential block of the THEMIS instrumentation that enable the formation of the solar spectrum and its detailed analysis. |
| MTR2 is the advanced version of the original MulTi-Ray spectrograph of THEMIS. MTR2 enables the production of high-spectral resolution spectrograms simultaneously in different wavelengths. This enables the study of different physical properties of the distinct layers of the solar atmosphere. | MTR2 is the advanced version of the original MulTi-Ray spectrograph of THEMIS. MTR2 enables the production of high-spectral resolution spectrographs simultaneously in different wavelengths. This enables the study of different physical properties of the distinct layers of the solar atmosphere. |
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| <html><font color="#ff9900"> Numerous user options are available here concerning the choice of the combination of spectral lines. </font></html> | <html><font color="#ff9900"> Numerous user options are available here concerning the choice of the combination of spectral lines. </font></html> |
| ==== (14) Spectral cameras ==== | ==== (14) Spectral cameras ==== |
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| At the exit of the spectrograph, several cameras are placed so that to record simultaneously in different wavebands spectral images (lambda,y) . The spectrograms have a typical spectral range of 6-7 Å (0.6-0.7 nm) depending of the wavelength. The spatial direction has an extend of 1' when performing polarised observations, 2' otherwise. When performing polarimetric observations, two spectrograms are fitted on the camera field-of-view, each including the opposite polarimetric state (e.g. I+V and I-V Stokes). | At the exit of the spectrograph, several cameras are placed so that to record spectral images (lambda,y) simultaneously in different wavebands. The spectrographic images have a typical spectral range of 6-7 Å (0.6-0.7 nm) depending of the wavelength. The spatial direction has an extend of 1' when performing polarised observations, 2' otherwise. When performing polarimetric observations, two spectrographs are fitted on the camera field-of-view, each including the opposite polarimetric state (e.g. I+V and I-V Stokes). |
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| <html><font color="#0000ff"> The spectrographic images from the spectral cameras are the main data product of THEMIS MTR2 spectrograph observation mode. </font></html> [[observation:data#context camera| (cf. THEMIS data products)]] | <html><font color="#0000ff"> The spectrographic images from the spectral cameras are the main data product of THEMIS MTR2 spectrograph observation mode. </font></html> [[observation:data#context camera| (cf. THEMIS data products)]] |
