Ha Quantum filter PE 0.4Å

this is the main message area for anything solar :)
Post Reply
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4059
Joined: Sun Nov 18, 2012 3:13 pm
Has thanked: 156 times
Been thanked: 893 times

Re: Ha Quantum filter PE 0.4Å

Post by Valery »

marktownley wrote: Mon Aug 13, 2018 3:11 pm
rsfoto wrote: Mon Aug 13, 2018 2:49 pm
About temperature that is the next problem. I saw yesterday that in my area it is taking long time to cool down or nearly it does not cool down. I think I will have to add some fans to cool it down. Yesterday the Quantum remained for a very long time at 6563.0Å and the light was yellow. I had it adjusted to 6562.8Å.

As of now it is cloudy so I will look for some ideas how to add a fan to the Quantum.
That's the problem with Daystars (compared to Solar Spectrum) - no active cooling. My Quark drifts off band with the heat if I leave it a while...
All my Quarks were stayed at the CWL no matter how long I use them for imaging. Even when I leave the telescope for an hour or two being tracking the sun.

Mark, do I understand correctly that if you adjusted your present Quark to the CWL, after a while it will change it's CWL transmission to the red (increased temp) ?


Valery


"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
User avatar
marktownley
Librarian
Librarian
Posts: 42270
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20424 times
Been thanked: 10243 times
Contact:

Re: Ha Quantum filter PE 0.4Å

Post by marktownley »

It only drifts off on the HaT, after several hours Valery, and that has only been this summer when ambient temperatures have been 25c+ outside whilst imaging.


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!
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4059
Joined: Sun Nov 18, 2012 3:13 pm
Has thanked: 156 times
Been thanked: 893 times

Re: Ha Quantum filter PE 0.4Å

Post by Valery »

Rainer,

According to Mark Wagner, who produce Solar Spectrum etalons (very much like DayStar does) the only correct ERF filter for such etalons is at least a red filter. The less unwanted heat from the sun will reach an etalon, the better etalon keeps it's position at a choosed wave length.


Valery
Last edited by Valery on Tue Aug 14, 2018 12:57 pm, edited 1 time in total.


"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4059
Joined: Sun Nov 18, 2012 3:13 pm
Has thanked: 156 times
Been thanked: 893 times

Re: Ha Quantum filter PE 0.4Å

Post by Valery »

marktownley wrote: Mon Aug 13, 2018 3:56 pm It only drifts off on the HaT, after several hours Valery, and that has only been this summer when ambient temperatures have been 25c+ outside whilst imaging.
It is too much drift if outside of H-a ! I have never experienced even +/-0,1A drift
from the position I have choosed for a given tuning. Quark(s) stays perfectly.


Valery


"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
User avatar
marktownley
Librarian
Librarian
Posts: 42270
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20424 times
Been thanked: 10243 times
Contact:

Re: Ha Quantum filter PE 0.4Å

Post by marktownley »

Guess they're all different!


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!
User avatar
rsfoto
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6159
Joined: Mon Jun 18, 2012 8:30 pm
Location: San Luis Potosi, México
Has thanked: 9401 times
Been thanked: 5561 times

Re: Ha Quantum filter PE 0.4Å

Post by rsfoto »

Valery wrote: Mon Aug 13, 2018 3:58 pm Rainer,

According to Mark Wagner, who produce Solar Spectrum etalons (very much like DayStar does) the only correct ERF filter for such etalons is at least a red filter. The less unwanted heat from the sun will reach a etalon, the better etalon keeps it's position at a choosed wave length.

Valery
Hi Valery,

Yes that was my suspicion too. I already added a Fan and so far no problem to reach 6563.8Å. It increased the temperature fomr 6562.8Å to 6563.8Å in 3 minutes 30 seconds Looks like the heater is enough to get it to the required tempertaure. The Observatory at the moment is at about 22°C with closed roof.

Cooling down from 6563.8Å to 6562.8Å took 4 and 30 seconds.

I fouind some Peltier elements here in case that is not enough and maybe in future build a controlled cooler with an Arduino. :idea:

So, if I have some day Sun again :lol: , I can test how effective my cooler is. It is one tiny 40mm PC fan. If that is not enough I can add two more. At the moment there a thick dark grey clouds over the Observatory. :shock:


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
User avatar
rsfoto
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6159
Joined: Mon Jun 18, 2012 8:30 pm
Location: San Luis Potosi, México
Has thanked: 9401 times
Been thanked: 5561 times

Re: Ha Quantum filter PE 0.4Å

Post by rsfoto »

Hi,

Here is my HIgh Tech cooling
IMG_3870_C1.jpg
IMG_3870_C1.jpg (1.51 MiB) Viewed 1258 times
IMG_3871_C1.jpg
IMG_3871_C1.jpg (1.42 MiB) Viewed 1258 times


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
User avatar
rsfoto
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6159
Joined: Mon Jun 18, 2012 8:30 pm
Location: San Luis Potosi, México
Has thanked: 9401 times
Been thanked: 5561 times

Re: Ha Quantum filter PE 0.4Å

Post by rsfoto »

Hi,

I had some holes between thick clouds and fired up the scope. I think I am getting closer and closer. Sky was still not good. A lot of haze.

The imaging started with the Sun at an altitude of 55°. So I have to wait for better skies and then do a lot of imaging.

Takahashi TOA 130 at 4000mm focal length, Quantum 0.4Å and Lumenera Infinity 2-1RM with Lucam Recorder and false colour mask. 37 fps. Had to use Gain for good exposure to the right and therefore they got a bit noisy. This camera is very good with low noise using Gain compared to others.

Perhaps when I have the whole day clear sky I will put on the ASI 1600MM Pro again. Unfortunately the image streaming is not clean. I get a lot of hang ups. The least with FireCapture.

Now I just need to image image and image as much as possible in order to get experience. It is very hard to focus with the image moving like

:seesaw
IMG_3873_C1.jpg
IMG_3873_C1.jpg (1.1 MiB) Viewed 1250 times
2018-08-13_16-56-36-1f_500.jpg
2018-08-13_16-56-36-1f_500.jpg (398.37 KiB) Viewed 1250 times
2018-08-13_16-13-45-1f_500.jpg
2018-08-13_16-13-45-1f_500.jpg (324.53 KiB) Viewed 1250 times
2018-08-13_16-12-47-1f_500.jpg
2018-08-13_16-12-47-1f_500.jpg (229.06 KiB) Viewed 1250 times


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
User avatar
pedro
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 12256
Joined: Sun May 01, 2016 8:26 pm
Location: Portugal
Has thanked: 14 times
Been thanked: 6576 times
Contact:

Re: Ha Quantum filter PE 0.4Å

Post by pedro »

Just read this thread, nice setups. Please keep us posted


Post Reply