sensor ageing?

[Space Bat]

Hello

Do sensors ccd or cmos age...difficult to get any info on this...but it seems one camera is suffering from more hot pixels...

Does anyone have info on whether sensors do suffer more noise and bad pixels over time.

Thanks

[gkec]

Hello

Do sensors ccd or cmos age...difficult to get any info on this...but it seems one camera is suffering from more hot pixels...

Does anyone have info on whether sensors do suffer more noise and bad pixels over time.

Thanks

In a word yes.  They are like any other semiconductor device in that turning on and off and running them continuously will degrade them over time.  Radiation, which is probably not a particular concern, does degrade semiconductor devices significantly.

I used to work with spacecraft and sensor degradation was a particular concern.  With CCDs they would be screened to find the best device out of a batch of devices.  I have one of the ones that failed!

[Space Bat]

So moving to a CCD could be something where same issue even though spending 3x the outlay

[swag72]

Even though the sensor may end up with more hot pixels over time on it's sensor - These are easily dealt with. I wouldn't use this as a reason to not get a CCD!!

[Space Bat]

I do have PI so am sure such issues can be countered. My worry is the not knowing if a ccd will play up with time....I know the sensor will out live the shutter on a dslr..and if not happy can pick up cheap missed bodies...Just looking for confidence from you guys if buy a ccd I would get many years use without excessive degradation

[ollypenrice]

Even though the sensor may end up with more hot pixels over time on it's sensor - These are easily dealt with. I wouldn't use this as a reason to not get a CCD!!

Exactly the right answer. One of the full frame CCDs we have here has got thousands of hours under its belt and it looks pretty rough. That's the one that did most of the work on our recent 400 hour Orion project. It calibrates out.

Olly

[Stu_2011]

Hi

In my old job I used to run a very specialised metal furnace that heated metals to very hot temperatures (around 6,000 K at times) and we had a fairly decent Sony CCD machine camera that was pointed at the metal for observation. This camera had a tough life and at times was exposed to extreme levels of light and often some pretty high levels of X-Rays dosage. It would also get hot and dusty, was dropped at least once, logged up thousands of hard hours, would be left on for days or even weeks at a time.

When I first got my CPC925 I borrowed this camera and I was amazed that the image was still very good, a few hot pixels but apart from that a pretty clean image. Sensors do degrade with time / exposure but equally they are surprisingly tough things. Don't worry too much about this and just use the camera is my advice.

Thanks

Sent from my iPad using Tapatalk