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#apertus IRC Channel Logs

2018/12/08

Timezone: UTC


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anuejn2
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philippej|away
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01:46
Bertl_oO
off to bed now ... have a good one everyone!
01:46
Bertl_oO
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BAndiT1983|away
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se6astian|away
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RexOrCine
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se6astian
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se6astian|away
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danieeeel
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Bertl_zZ
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09:49
Bertl
morning folks!
09:55
Bertl
off for now ... bbl
09:55
Bertl
changed nick to: Bertl_oO
10:26
se6astian
good news: the 2.8" LCD from https://www.buydisplay.com/ arrived and is 100% compatible with adafruit one we were using
10:27
se6astian
I can't do a real A to B comparision as I can only plug in one LCD at the time but the first impression is that it might actually be a bit better with colors than the adafruit one
10:29
felix_
nice
10:29
se6astian
quick phone picture snap: https://cloud.gerade.org/index.php/apps/gallery/s/ynZeeJXT3pbK6gw#20181208_112111_HDR.jpg
10:29
se6astian
the blue streak gave me a brief shock but its on the cover not the LCD itself :)
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BAndiT1983
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BAndiT1983
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BAndiT1983|away
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BAndiT1983
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BAndiT1983|away
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niteesh
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se6astian
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BAndiT1983
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17:03
sanaris
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BAndiT1983|away
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17:08
sanaris
Hello. If I am looking into digital camera design, I think that there's a lot of available designs. Some of them are open. Does it worth to tinker my own design or available ones are "universal" and "flexible"?
17:09
sanaris
I havn't yet decide whether I want good CCD sensor. And modern cameras are all gone into cheaper CMOS sensors for their designs/
17:09
sanaris
The price of good CCD sensor is just starting from 5 hundreds
17:35
se6astian|away
changed nick to: se6astian
17:36
se6astian
hi sanaris
17:36
se6astian
do you have a specific question we can help you with?
17:37
se6astian
not sure what you mean with "available ones" <- what are your requirements or what do you want to build exactly?
17:43
danieel
sanaris: which CCD do you consider good for your target application?
17:47
sanaris
The current plan is 16-bit large pixel sensor, similar to KAF-1608
17:50
se6astian
what is your target application?
17:50
sanaris
* KAF-16803, which is 9um*9um, 100k electron well with 3 electrons of dark current and 60% effectiveness
17:51
BAndiT1983
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17:52
sanaris
It is the best fit into measurement applications I can find to my budget
17:56
Bertl_oO
what ADC(s) do you plan to use?
17:57
danieel
well KAF* will need a mechanical shutter I believe
18:33
sanaris
I have old unused cameras which can serve one more time as shutter-only devices
18:34
danieel
so this is for a photography project?
18:35
sanaris
I have checked, in one of designs I look into, the converter AD9826 is used to digitize the matrix
18:36
sanaris
Also I checked what Elphel do. They use FPGA's in their schemes.
18:36
danieel
it is not practical to use the vintage timing asics today
18:37
sanaris
First main question is clocking the matrix. Sony used their IC for their own matrices
18:39
RexOrCine|away
changed nick to: RexOrCine
18:39
sanaris
more like accurate measurement then photography, I want optics to accurately measure the incoming light, then cut light spectre with special filter and achieve filtered image
18:40
danieel
long story short.. purchase a used usb ccd camera and focus on the optics and math for evaluations
18:43
sanaris
First may be I will test this with some old CCD found on ebay or smth to understand how is possible to remove unneccessary IR filter and may be this will boost the CCD matrix in wider spectre. But I'm only stuck with old for now before I'm going for costly and modern CCDs
18:43
danieel
the spectral sensitivity is given in the datasheets, would be good to check first before commiting to any purchase
18:45
danieel
for practical uses I would not go with KAF unless some really specific aspect of it makes it the only choice
18:46
sanaris
KAF is the only choice which Mouser gives me. Those are documented and already used in similar (astrophotography) device.
18:47
sanaris
But this goes not like "photography", more like pure imaging.
18:47
danieel
better for lower cost design are the sony CCDs, e.g. ICX493AQA - you can source these pretty cheap from nikon parts
18:47
danieel
there are independent designs to drive these, mainly for astrophoto purposes
18:47
danieel
but it is COLOR, unlike the mono option for KAF
19:00
sanaris
That Sony CCD looks interesting. Why you think that KAF is problematic?
19:04
danieel
its more expensive, and if you do not know what you are doing.. then not he good one to start. Unless you go on with smaller res versions first, to clean your design bugs
19:07
sanaris
From datasheet I see that Sony has good quantum efficiency, but lacks well size.
19:10
sanaris
So the two main camps of sensors are KAI/KAF versus Sony/Fairchild, as I understood from data
19:12
danieel
forgot the Philips/Dalsa/Teledyne path, they make nice medium format ones
19:14
danieel
which country are you from?
19:14
sanaris
from Russian far province
19:14
danieel
then get inspired e.g. here - http://astroccd.org/2015/04/cam84/
19:15
danieel
there seems to be more designs, maybe hes from your region as well
19:18
sanaris
this design is great, but the part I don't understand is USB thingy. May be I go for the Arduino or Raspberry with SDcard
19:18
danieel
there is a cam86 design as well, with a mcu
19:18
danieel
http://astroccd.org/2016/10/cam86/
19:19
danieel
this seems more self-contained, althought I do not know the writing.. judging by the parts on the board
19:23
sanaris
One guy offers cam90 for 200$, but I want to explore what could be done
19:34
sanaris
Thanks. Looks like today is gone. Nigthy
19:35
sanaris
changed nick to: sanaris_sleep
19:36
danieel
np
20:16
niteesh
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se6astian
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