ROT2 command of IRIS
ROT2 command of IRIS
Hi, Ken Harrison,
I'm Toshio Ohnishi. I'm old amateur Spectrohelioscope maker.
Recently, I made short spectroheliograph. This is not completed yet.
I have some trouble about IRIS of C.Buil.
I using AZW174MM as CCD.I do't know to use ROT2 command.
What can I should do to ROT2 command? ROT command is OK.
Toshio Ohnishi
I'm Toshio Ohnishi. I'm old amateur Spectrohelioscope maker.
Recently, I made short spectroheliograph. This is not completed yet.
I have some trouble about IRIS of C.Buil.
I using AZW174MM as CCD.I do't know to use ROT2 command.
What can I should do to ROT2 command? ROT command is OK.
Toshio Ohnishi
- Attachments
-
- 121205_K.jpg (101.39 KiB) Viewed 8863 times
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Welcome to the group!
I have limited experience with IRIS but will investigate the ROT2 command for you.
I would recommend that you download Wah!'s SLiM (Spectral Line Merge) program from the library section; it's much easier to use and is very effective.
Can you give us more detail of your SHG.
Welcome to the group!
I have limited experience with IRIS but will investigate the ROT2 command for you.
I would recommend that you download Wah!'s SLiM (Spectral Line Merge) program from the library section; it's much easier to use and is very effective.
Can you give us more detail of your 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
- marktownley
- Librarian
- Posts: 42545
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20813 times
- Been thanked: 10485 times
- Contact:
Re: ROT2 command of IRIS
Welcome Toshio! I always admire your SHG images on facebook, glad you found your way here
Mark
Mark
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!
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
welcome Welcome Toshio!
I also saw your recent post on daystar filters FB
Yes a lot of us use Wah! merge program
I also saw your recent post on daystar filters FB
Yes a lot of us use Wah! merge program
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Looking at the command line structure of ROT2.....
Command: ROT2 [IN] [OUT] [XC] [YC] [ANGLE] [NUMBER]
where
[IN] - generic name of the sequence of images to be treated (e.g. Solar_in)
[OUT] - generic name of the rotated images (e.g. Solar_out)
[XC], [YC] - the pixel coordinates of the centre of rotation (e.g. 150, 400)
[ANGLE] - the applied rotation in degrees (e.g. 8)
[NUMBER] - the number of images in the sequence (e.g. 25).
Example
ROT2 Solar_in Solar_out 150 400 8 25
Looking at the command line structure of ROT2.....
Command: ROT2 [IN] [OUT] [XC] [YC] [ANGLE] [NUMBER]
where
[IN] - generic name of the sequence of images to be treated (e.g. Solar_in)
[OUT] - generic name of the rotated images (e.g. Solar_out)
[XC], [YC] - the pixel coordinates of the centre of rotation (e.g. 150, 400)
[ANGLE] - the applied rotation in degrees (e.g. 8)
[NUMBER] - the number of images in the sequence (e.g. 25).
Example
ROT2 Solar_in Solar_out 150 400 8 25
"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
Re: ROT2 command of IRIS
Thank you all.
Telescope 80mm FL=910
Collimator(Camera) 70mm FL=700
Grating 1800L/mm 5000A Brazed
Slit width=20micron
CCD ASI174mm
The SLIM is not work in my windows10.
When I push Merge button,it shows 'System.NullReferenceException'.
Telescope 80mm FL=910
Collimator(Camera) 70mm FL=700
Grating 1800L/mm 5000A Brazed
Slit width=20micron
CCD ASI174mm
The SLIM is not work in my windows10.
When I push Merge button,it shows 'System.NullReferenceException'.
- Attachments
-
- SLIM monitor
- _1320746_KK.jpg (196.11 KiB) Viewed 8815 times
-
- relay lens on the eyepiece folder
- _1320741_KK.jpg (244.19 KiB) Viewed 8815 times
-
- slit
- _1320724_KK.jpg (291.62 KiB) Viewed 8815 times
-
- folded up parts
- _1320721_KK.jpg (328.38 KiB) Viewed 8815 times
-
- telescope and colimator lens
- _1320718_KK.jpg (305 KiB) Viewed 8815 times
-
- CCD and eyepiece
- _1320714_KK.jpg (262.84 KiB) Viewed 8815 times
-
- Overview
- _1320713_KK.jpg (281.4 KiB) Viewed 8815 times
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Hmmm
I think that means your AVI is larger than the 2Gb limit.
You need to use VDub to rope around the line of interest to reduce the file size.
Your SHG looks very impressive!!
Hmmm
I think that means your AVI is larger than the 2Gb limit.
You need to use VDub to rope around the line of interest to reduce the file size.
Your SHG looks very impressive!!
"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
Re: ROT2 command of IRIS
Thank you Ken,
Even if 451MB,I got an error in SliM.
I do'nt understand this error message.
Even if 451MB,I got an error in SliM.
I do'nt understand this error message.
Re: ROT2 command of IRIS
OK !
VDab-> SliM I could make 1 frame!
How can I save this frame?
I'm a beginner in this procedure.
VDab-> SliM I could make 1 frame!
How can I save this frame?
I'm a beginner in this procedure.
Re: ROT2 command of IRIS
I found out the new one in same old.avi folder.
I should become aware of saving method. So sorry!
I should become aware of saving method. So sorry!
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
SliM auto creates a TIFF file with same name as avi that went in - should be in same directory
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
The binocular device is used to facilitate optical axis adjustment.
In order to use it as a spectrohelioscope, a littrow type optical system is not appropriate.
Off-axis light causes distortion.
In order to use it as a spectrohelioscope, a littrow type optical system is not appropriate.
Off-axis light causes distortion.
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
I have a similar set-up using a 100/1300 scope an a 70/900 Littrow 1200 l/m grating spectrograph.
The only distortion is the slant of the absorption lines within the spectrum which is easily fixed. A similar system is used by Fulvio Mete (http://www.lightfrominfinity.org/Hirss% ... scopio.htm)
Do you have other distortions??
I have a similar set-up using a 100/1300 scope an a 70/900 Littrow 1200 l/m grating spectrograph.
The only distortion is the slant of the absorption lines within the spectrum which is easily fixed. A similar system is used by Fulvio Mete (http://www.lightfrominfinity.org/Hirss% ... scopio.htm)
Do you have other distortions??
"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
Re: ROT2 command of IRIS
No, I have not other distortion.
My aim is to make a telescope to observe the sun by my eye.
But I have not succeeded yet.
My aim is to make a telescope to observe the sun by my eye.
But I have not succeeded yet.
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Understood.
Which 20 micron entrance slit do you use - Thorlabs?
A SHS needs vibrating slits or Anderson prisms - see Fred's book (files area of the Yahoo Astronomical Spectroscopy group) or Chapter 11 of "Imaging Sunlight" (http://www.springer.com/gp/book/9783319248721)
Understood.
Which 20 micron entrance slit do you use - Thorlabs?
A SHS needs vibrating slits or Anderson prisms - see Fred's book (files area of the Yahoo Astronomical Spectroscopy group) or Chapter 11 of "Imaging Sunlight" (http://www.springer.com/gp/book/9783319248721)
"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
Re: ROT2 command of IRIS
My Hale vibrating slit made by razor blade.
H-alpha photo by old SHS is as follow.
H-alpha photo by old SHS is as follow.
- Attachments
-
- Today's solar surface
- New1_KC.jpg (171.63 KiB) Viewed 8719 times
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Well done.
It looks like you understand the design requirements.
Look forward to seeing your future results.
Well done.
It looks like you understand the design requirements.
Look forward to seeing your future results.
"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
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
that photo with SHS how was that taken
that's NOT using a merge program - correct?
that's NOT using a merge program - correct?
Re: ROT2 command of IRIS
My old SHS is as follows,
I need not use 'merge' soft.
I need not use 'merge' soft.
- Attachments
-
- last year's h-alpha photo
- solar_2015_02_11.jpg (73.69 KiB) Viewed 8686 times
-
- synthesizer folded Hale slits
- CIMG0305.JPG (7.98 MiB) Viewed 8686 times
-
- Over view
- _1300314_KK.jpg (391.23 KiB) Viewed 8686 times
-
- My old spectrohelioscope design
- SHS.jpg (1.22 MiB) Viewed 8686 times
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
Wow impressive!
So the 2 slits spin around I assume
To build image?
Kind of like mr Hale did way back when
So the 2 slits spin around I assume
To build image?
Kind of like mr Hale did way back when
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
John,
The small pin on the motor in the slot "oscillates" the two slit plates back and forth. See "Imaging Sunlight", sect 11.2.1 for more details.
The small pin on the motor in the slot "oscillates" the two slit plates back and forth. See "Imaging Sunlight", sect 11.2.1 for more details.
"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
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
Very nice results from a very nice SHS. Impressive!
Well done.
Very nice results from a very nice SHS. Impressive!
Well done.
"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
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
John,
Around 30-40 oscillations per second is needed for persistence of vision, p 66-67.
Around 30-40 oscillations per second is needed for persistence of vision, p 66-67.
"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
Re: ROT2 command of IRIS
Maybe,for visual using oscillations is 20-30 per second vibration and for graphical using is 5-10 per second.
For photo it need not make vibrate so fast. Conposite procedure is useful for smoothing.
For photo it need not make vibrate so fast. Conposite procedure is useful for smoothing.
-
- Im an EXPERT!
- Posts: 373
- Joined: Tue May 01, 2012 2:14 am
- Has thanked: 8 times
- Been thanked: 17 times
Re: ROT2 command of IRIS
Hi Merrill55,
I am sorry that the SLiM has some problem to process the avi files because it is using an external library to decode the avi format.
If you use the mono 8bit or 16bit SER file format to capture the video, it should be able to support without problem (I hope)
I was too lazy to implement the code for 16bit SER vertical mode, please make the spectral lines horizontally while using 16bit SER.
Also, using ROI function to reduce the video resolution can help improving the processing speed and also the capturing frame rate.
Thanks!
I am sorry that the SLiM has some problem to process the avi files because it is using an external library to decode the avi format.
If you use the mono 8bit or 16bit SER file format to capture the video, it should be able to support without problem (I hope)
I was too lazy to implement the code for 16bit SER vertical mode, please make the spectral lines horizontally while using 16bit SER.
Also, using ROI function to reduce the video resolution can help improving the processing speed and also the capturing frame rate.
Thanks!
Re: ROT2 command of IRIS
Thanks Wah.
I'm beginner in SHG. So I must learn more about dogital procedure.
ROi is helpful for me.
I tried Vdub and SLim recently.
I Try to more experience about DigitalSpectroheliograph.
Thank you.
I'm beginner in SHG. So I must learn more about dogital procedure.
ROi is helpful for me.
I tried Vdub and SLim recently.
I Try to more experience about DigitalSpectroheliograph.
Thank you.
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
Toshio,
You may find the new book "Imaging Sunlight -using a digital spectroheliograph" useful.
It has a whole chapter on the various processing software currently available and how to use them for the SHG.
You may find the new book "Imaging Sunlight -using a digital spectroheliograph" useful.
It has a whole chapter on the various processing software currently available and how to use them for the 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
Re: ROT2 command of IRIS
Trial h-alpha photo.
Very poor image.
Very poor image.
- Attachments
-
- 2016_12_15
- 08_47_26_Wah.jpg (315.66 KiB) Viewed 7684 times
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
I know one amateur. His name is Takashi Sakae. He is a teacher of high school.
I don't know any other amateur without him.
I don't know any other amateur without him.
- Attachments
-
- rtn2012_0018.pdf
- (2.06 MiB) Downloaded 150 times
-
- h24_05.pdf
- His article in 2012
- (455.93 KiB) Downloaded 173 times
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: ROT2 command of IRIS
John,
Already done!!
I'll look at translating the documents.
Already done!!
I'll look at translating the documents.
"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
Re: ROT2 command of IRIS
My Christmas solar image is as follows;
Somewhat blur image.
Somewhat blur image.
- Attachments
-
- 2016_12_25
- 09_03_29_K_002_K.jpg (169.87 KiB) Viewed 7566 times
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
Re: ROT2 command of IRIS
Merry Christmas all.
Have a nice holy night !!
Toshio (a part of HYLOV P.233)
Have a nice holy night !!
Toshio (a part of HYLOV P.233)
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
Re: ROT2 command of IRIS
Trial h-alpha photo by short SHG. 2016_12_31
- Attachments
-
- 2016_12_31
- 12_19_28_000_OKK.jpg (53.28 KiB) Viewed 7445 times
-
- Way More Fun to Share It!!
- Posts: 2033
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1204 times
- Spectral Joe
- Ohhhhhh My!
- Posts: 120
- Joined: Wed Mar 14, 2012 4:34 am
- Location: Livermore, California
Re: ROT2 command of IRIS
Yes, it's shaping up. I see two immediate issues. First, there's a lot of stray light. This can be due to misplaced reflection traps, but in your case it's likely back reflections from the binoviewer. Second, there is noticeable vignetting in the direction along the slit, usually the result of not having the telescope objective imaged onto the grating. It's a common problem, fixed by using a field lens at the entrance slit. Overall, though. this is a very good start.
Observing the Sun with complex optical systems since 1966, and still haven't burned, melted or damaged anything.
Not blind yet, either!
Light pollution? I only observe the Sun, magnitude -26.74. Pollute that!
Not blind yet, either!
Light pollution? I only observe the Sun, magnitude -26.74. Pollute that!
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
Re: ROT2 command of IRIS
Bartolick;
Yes,I should pay attention to stray light. I recognize it.
Littrow lens cause a strong ghost.(Acromatic lens cause four goast)
The binoviewer cause a strong ghost of the slit shape.
Therefore I block it using red filter (R64) in the lower part of the binoviewer.
When I use other wavelengths, the use of the color filter corresponding to each will be necessary.
The serious problem is not good quality collimator lens which light passes twice.
I must exchange on an apochromatic lens.
Probably I think that the image becomes a little sharper.
Yes,I should pay attention to stray light. I recognize it.
Littrow lens cause a strong ghost.(Acromatic lens cause four goast)
The binoviewer cause a strong ghost of the slit shape.
Therefore I block it using red filter (R64) in the lower part of the binoviewer.
When I use other wavelengths, the use of the color filter corresponding to each will be necessary.
The serious problem is not good quality collimator lens which light passes twice.
I must exchange on an apochromatic lens.
Probably I think that the image becomes a little sharper.
Re: ROT2 command of IRIS
Hi all;
Recent my SHG image.
Low contrast !!
Recent my SHG image.
Low contrast !!
- Attachments
-
- 10_01_48_000_OKKK.jpg (117.4 KiB) Viewed 5797 times
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
- marktownley
- Librarian
- Posts: 42545
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20813 times
- Been thanked: 10485 times
- Contact:
Re: ROT2 command of IRIS
Very good!
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!