CaII H spectroheliogram

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fulvio.mete
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CaII H spectroheliogram

Post by fulvio.mete »

My last spectroheliogram in CaII H light at 3968 Å, taken with my self-built Hires spectrograph POSS (POrtable Solar Spectrograph) 2 on last April 23 The instrument (photo attached) is a Littrow that I modified in some points to improve the yield of digital spectroheliograms. The instrument, one of the 5 Littrow Hires spectrographs built by me, was dedicated exclusively to the acquisition of spectroheliograms in the UV part of the spectrum.
Fulvio Mete
Attachments
POSS2 web.jpg
POSS2 web.jpg (537.17 KiB) Viewed 654 times
Sun CaII H 22_04_23 single img final  web.jpg
Sun CaII H 22_04_23 single img final web.jpg (383.77 KiB) Viewed 654 times


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Re: CaII H spectroheliogram

Post by highfnum »

very clean
what is diameter and FL of scopes

are you using transmission grating?


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fulvio.mete
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Re: CaII H spectroheliogram

Post by fulvio.mete »

Hi.highfnum.
The configuration of the instrument is Littrow (autocollimating optics) modified by me with an off axis adjustable slit and others modifications.The spectrograph optics is a SW 80/600 ED doublet, while the optics of telescope is a cheap 70/400 Celestron acro refractor.The spectrograph grating is a 2400 g/mm Edmund Optics.
Details of configuration and construction of this instrument and others similar will be find in my book (thread atop this topic of Solar Chat)
Fulvio Mete


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Re: CaII H spectroheliogram

Post by fulvio.mete »

I forget: the grating is a reflective one


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Re: CaII H spectroheliogram

Post by Montana »

Very nice to see the set up and great image :bow :hamster:

Alexandra


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Re: CaII H spectroheliogram

Post by marktownley »

Very nice!


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Re: CaII H spectroheliogram

Post by fulvio.mete »

Thanks , Alexandra and Mark for viewing.


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Re: CaII H spectroheliogram

Post by p_zetner »

Very nice work and the instrument is a beauty!
Cheers.
Peter


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