In other threads the use and capabilities of the SHG has been raised.
I thought it would be beneficial to have a dedicated thread to address some of the concerns and future direction of the development of the SHG and associated software.
The time resolution issue I feel can/ could be addressed by the use of fast frame cameras to provide a full disk scan in around 4 secs. A processed, sharpened stack of a few of these exposures would improve the definition and SNR.
Remember the SHG can provide multiple images at various bandwidths - no sweet spot effects and if the spectrograph is pre calibrated in wavelength automatic CWL selection could be added......
Extraction and application of synthetic flats to the spectroheliogram is already a pretty mature technology and future enhancements will speed up the process.
There are software examples of direct SHG imaging which show this potential.
What are the other areas of concern/ improvement which should be considered??
Future developments for the digital SHG
- Merlin66
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Future developments for the digital SHG
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Geremia Forino
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Re: Future developments for the digital SHG
very interesting,
I have the luck to have as a friend Fulvio Mete but, very lazily, do some look at his interesting projects.
I see this like the old Ham Radio SSTV (slow scan television) evolve in the current Ultra High Resolution system.
I have the luck to have as a friend Fulvio Mete but, very lazily, do some look at his interesting projects.
I see this like the old Ham Radio SSTV (slow scan television) evolve in the current Ultra High Resolution system.
- p_zetner
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Re: Future developments for the digital SHG
Hi Ken.
Interesting topic for a thread.
Cheers.
Peter.
Interesting topic for a thread.
Cheers.
Peter.
Last edited by p_zetner on Fri May 27, 2016 2:51 pm, edited 1 time in total.
- Merlin66
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Re: Future developments for the digital SHG
I'm already discussing the design issues of a 3D printed spectrograph with others.
Looking so very promising. The maximum element size is restricted to a 200mm cube.
Looking so very promising. The maximum element size is restricted to a 200mm cube.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Merlin66
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Re: Future developments for the digital SHG
Wah!
Which parts concern you?
Achromatic lenses? Mirrors?
I though guys like Thorlabs and Edmund were a good source.....
Finding good adjustable long (>6mm) slit assemblies I find more of a problem.
Which parts concern you?
Achromatic lenses? Mirrors?
I though guys like Thorlabs and Edmund were a good source.....
Finding good adjustable long (>6mm) slit assemblies I find more of a problem.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer