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Re: CCD saturation [message #63101 is a reply to message #63031]

Tue, 28 October 2008 01:56

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Mon, 27 Oct 2008 06:27:03 -0700 (PDT), pgrigis@gmail.com wrote:

>
>
> Wox wrote:
>> Marshall Perrin wrote:
>>
>>> Shape detection is not the way to go here, versus detecting the level
>>> at which pixels saturate. There should be some characteristic number of
>>> counts per pixel below which you know data is not saturated.
>>
>> Yes, but this only works for the inner part of a saturated spot +
>> streaks. The edges don't have a value of 65535 (it's a 16bit CCD
>> camera) and can in fact have a lower value than non-saturated spots
>> which I want to preserve.
>
> Does the CCD really behaves this way? Seems pretty bad if
> saturation is spread around that way... Are you sure it is not stray
> light?

I'm sure. And yes it's bad and should be avoided (by lowering
acquisition time, putting absorbers in the beam, etc.), but in
automated measurements it can happen you only notice it after the
experiment.

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[Message index]

		CCD saturation By: Wox on Fri, 24 October 2008 02:54
		Re: CCD saturation By: Wout De Nolf on Tue, 28 October 2008 02:42
		Re: CCD saturation By: MichaelT on Wed, 29 October 2008 08:07
		Re: CCD saturation By: Wout De Nolf on Thu, 30 October 2008 01:31
		Re: CCD saturation By: Wout De Nolf on Tue, 28 October 2008 01:56
		Re: CCD saturation By: MichaelT on Mon, 27 October 2008 06:43

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