First light for the Basler 1920-155um based upon the IMX174

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fjabet
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First light for the Basler 1920-155um based upon the IMX174

Post by fjabet »

Hi all,

Despise a cold, I managed at least to make some test with the new Basler based upon the promising IMX174 Sony CMOS sensor. This large size sensor (1/1.2") boast a full HD resolution at 155fps on USB3 interface with global shutter and quite large pixels of 5,85µm.
I measured the performances and they were even better than the specs :

- It slightly above 12 bits of real dynamic or 74dB or over 5000 grey levels
- more than 33,7Ke- well depth
- a low read out noise of 6,5e- : that is very low considering the 320Mpixel/s throughput and the global shutter mode !

The quantum efficiency is high as well, on par with its CDD counterparts such as the ICX674/694.

Nevertheless the measure are not everything for sensors, especially when Sony embeds some noise processing pipelines, I saw that with the promising IMX035 that was a real disappointement in the end.

Fair seeing this morning and a great weather, so I tested with a HaT 203mm solar telescope and a PST etalon + BF15.

The very narrow interference fringes quickly diseapear with a sligh camera tilt. I use 12dB gain on a range of 48, the base gain is very low. I use some gamma as well as usual.
The throughput was slowdown to 97 fps because of my SATA2 interface on my second SSD.

Some proms :

Image

full : http://astrochonum.com/Astro/solaire/1- ... /prot1.jpg

Image

full : http://astrochonum.com/Astro/solaire/1- ... /prot2.jpg

Sur la surface :

Image
full : http://astrochonum.com/Astro/solaire/1- ... p504-w.jpg

A mosaic, the left part had better conditions
Image
full : http://astrochonum.com/Astro/solaire/1- ... urface.jpg

Frédéric.


[Ce message a été modifié par chonum (Édité le 02-10-2014).]

[Ce message a été modifié par chonum (Édité le 02-10-2014).]
Last edited by fjabet on Thu Oct 02, 2014 12:54 pm, edited 1 time in total.


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GUS
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Re: First light for the Basler 1920-155um based upon the IMX

Post by GUS »

Amazing images, great prom and spicule detail.


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Re: First light for the Basler 1920-155um based upon the IMX

Post by grimble_cornet »

Stunning detail.


.

.



.


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Re: First light for the Basler 1920-155um based upon the IMX

Post by Montana »

Wow!! these are good :bow :bow :bow

Alexandra


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Re: First light for the Basler 1920-155um based upon the IMX

Post by michael.h.f.wilkinson »

I take it you are pleased with the camera ;)

That is an awesome set of close-up images


Solar kit: GP-C8 with Thousand Oaks Solar filter, APM 80mm F/6, Lunt Herschel Wedge, Solar Spectrum 0.3Å H-alpha filter, Beloptic Tri-Band ERF (80mm free aperture), Thousand Oaks 90mm ERF, Coronado SolarMax II 60mm with Double Stack Unit. Lunt straight B1800 Ca-K module.
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Re: First light for the Basler 1920-155um based upon the IMX

Post by Paul »

Wow!, they are excellent!

Paul


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Re: First light for the Basler 1920-155um based upon the IMX

Post by Carbon60 »

Very nice indeed! Looks like a very capable camera.

Stu


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Re: First light for the Basler 1920-155um based upon the IMX

Post by Valery »

Nice! Thanks for sharing with us your findings.

About 18months ago I spoke with an engineer from the PGR about their prospective camera with this chip. And then I came to conclusion that this will be my next camera for solar imaging. Just need to change my instruments for larger scale and larger field.


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Re: First light for the Basler 1920-155um based upon the IMX

Post by Bill Edelen »

Great results...


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Re: First light for the Basler 1920-155um based upon the IMX

Post by edobosz »

Very impressive results I forward to further images.
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Re: First light for the Basler 1920-155um based upon the IMX

Post by MapleRidge »

An excellent set of trial images...looks very promising!

Brian


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Re: First light for the Basler 1920-155um based upon the IMX

Post by swisswalter »

Hi Frédéric

congratulations on the first light


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fjabet
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Re: First light for the Basler 1920-155um based upon the IMX

Post by fjabet »

I regret the CMOSIS square ratio though, this IMX is a pure HDTV 1,6 ratio.
Sensitivity is also a bit on the low side as well when compared with CCD/CMOS deeply depleted sensors, it is not deeply depleted as you can see below :

Image

It is not a big deal for solar imaging though.

Ang images are so clean, the only sensor that gave me this feeling is the EV76C560 from E2V when used in rolling shutter.

Frédéric.


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Re: First light for the Basler 1920-155um based upon the IMX

Post by Valery »

fjabet wrote:
Ang images are so clean, the only sensor that gave me this feeling is the EV76C560 from E2V when used in rolling shutter.

Frédéric.
Why in this case, you do use the icx174 instead of continue to use EV76C560 from E2V ?


Valery.


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Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
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Re: First light for the Basler 1920-155um based upon the IMX

Post by fjabet »

Because it's larger, faster, it is a global shutter, that's quite important for solar imaging, and it has a better dynamic.
But it's more expansive as well (x2) and I think it may not perform as good for planetary imaging.
The E2V is a very good all around performer thanks to its huge QE in the NIR version.


jmreales57

Re: First light for the Basler 1920-155um based upon the IMX

Post by jmreales57 »

Stunning images Frederic
see that to remove the banding caused by certain cameras the tilt,
as you do? There are some mechanical element to do?
you understand what you tilt the plane of the sensor is on the optical axis, is it?
I while back I had problems with banding Lumenera Infinity 2-1 spectrum sunscreen 1 Series 0.3A and solved with pseudoflats but is a nuisance
thanks for your help
a greeting


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Re: First light for the Basler 1920-155um based upon the IMX

Post by fjabet »

Sorry I didn't see your post before. The Basler presents light newton rings, but it's very faint when compared with a CMOSIS for example. I used a tilt adaptor and they are gone once for all. I use flat for dust only if needed. I do make darks but that's quite straight forward.
The Basler doesn't have any chamber glass cover, that means the sensor is directly exposed. That is a good thing for in solar imaging each glass plate brings its own possibility of interference fringes...

Frédéric.


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Re: First light for the Basler 1920-155um based upon the IMX

Post by pedro »

Amazing resolution Frédéric.

Amicalement


jmreales57

Re: First light for the Basler 1920-155um based upon the IMX

Post by jmreales57 »

fjabet wrote:Sorry I didn't see your post before. The Basler presents light newton rings, but it's very faint when compared with a CMOSIS for example. I used a tilt adaptor and they are gone once for all. I use flat for dust only if needed. I do make darks but that's quite straight forward.
The Basler doesn't have any chamber glass cover, that means the sensor is directly exposed. That is a good thing for in solar imaging each glass plate brings its own possibility of interference fringes...

Frédéric.

Thank you very much for the reply
at first my idea was to buy this model GS3 U3-41C6NIR-C-1 "USB 3.0 Grasshopper NIR Camera for the entire sun at 1 meter focus f10
This camera seemed to me very interesting price and sensor format but I discouraged some comments on the banding effect
even so I am optimistic that with the pixel size and focal ratio that is difficult for me to appear newton rings, I'm right?
thanks for your help


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