new SHG : full spectrum ready

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DSobserver
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new SHG : full spectrum ready

Post by DSobserver » Fri Aug 05, 2016 10:41 pm

Hi

After some more improvement my new SHG is now seriously taking this week its 1st light

Ha and CAk from 31st of july

Image
Image

Hb and He from 1st of august

Image
Image

still some issue with focus and slit....

Here some picture of my new toy

Image Image

highfnum
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Re: new SHG : full spectrum ready

Post by highfnum » Fri Aug 05, 2016 11:58 pm

Nice

What is white case made of?

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Merlin66
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Re: new SHG : full spectrum ready

Post by Merlin66 » Sat Aug 06, 2016 12:09 am

John,
I think Vincent uses 6mm ply for the housing.
Great results!
What changes did you make to the imaging system??
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

highfnum
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Re: new SHG : full spectrum ready

Post by highfnum » Sat Aug 06, 2016 1:47 pm

Also I Notice That Grating Is Quite A Distance from lens

Is that normal?

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marktownley
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Re: new SHG : full spectrum ready

Post by marktownley » Sat Aug 06, 2016 7:39 pm

Wow! This is very impressive!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: new SHG : full spectrum ready

Post by Merlin66 » Sat Aug 06, 2016 10:19 pm

Vincent's original design is covered in Chapter 9.8 of "Imaging Sunlight"
The spacing between the grating and the optics is due to the choice of a small total angle (between the collimator and the imaging lens) to reduce the anamorphic factor (p 112) of the instrument.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Montana
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Re: new SHG : full spectrum ready

Post by Montana » Mon Aug 08, 2016 10:57 am

WOW!! quite an incredible set of images, what an achievement :bow

Alexandra

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Re: new SHG : full spectrum ready

Post by Wah » Thu Aug 11, 2016 7:24 pm

Let me remove the bands.
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Re: new SHG : full spectrum ready

Post by highfnum » Thu Aug 11, 2016 9:10 pm

very good

Wah! to the rescue !!!

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Montana
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Re: new SHG : full spectrum ready

Post by Montana » Fri Aug 12, 2016 9:27 am

Wow! superb :bow
Alexandra

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