My newly DIY spectroscope and first light

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Wah
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My newly DIY spectroscope and first light

Post by Wah »

My newly DIY spectroscope and first light

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Re: My newly DIY spectroscope and first light

Post by marktownley »

Very nice! :)


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Re: My newly DIY spectroscope and first light

Post by swisswalter »

Hi Wah

congratulations, looks very neat. Would you please give some more information about the inside of the long bar?


Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

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Re: My newly DIY spectroscope and first light

Post by Wah »

Thank you all, I was following the design of VHIRSS:
http://www.lightfrominfinity.org/VHIRSS/VHIRSS.htm



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Re: My newly DIY spectroscope and first light

Post by swisswalter »

Hi Wah

Ah I see. thank you very much.


Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

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from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)
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Re: My newly DIY spectroscope and first light

Post by Merlin66 »

A long focal length Littrow design.
Very neat....
What are you using for the slit?
Which grating do you use?


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Re: My newly DIY spectroscope and first light

Post by Wah »

I don't know how to make a good metal slit, so I just use a piece of paper to make a temp slit.
I think I will find a metal one and replace current slit.

I got a 30mm x 30mm grating from a China surplus shop and don't have its detail spec, I guess around 600g/mm


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Re: My newly DIY spectroscope and first light

Post by Merlin66 »

Wah,
Surplus Shed sell cheap adjustable slit assemblies....you can also use a couple of pencil sharpener blades mounted on a perforated fridge magnet to make pretty good slits.
Yes, the grating is probably a 600 l/mm.
I have a spreadsheet, SimSpecV4 which will allow to to calculate the outcome with various cameras etc. Drop me an email for a copy.....


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Re: My newly DIY spectroscope and first light

Post by Wah »

Merlin66,

I have been waiting for Surplus Shed slit for several months...
I will try the blades with magnet later.

The collimation for this toy is not so easy, the sharpness of the spectrum lines are not good and not even, I think I will try to use laser light to help collimation later.

Can you send the spreadsheet to [email protected] ?

Thank you!


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Re: My newly DIY spectroscope and first light

Post by Montana »

Well done :bow:

Superb lines :thumbsup:

Alexandra


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