camera calibration

[Paul Jorden]

Nick,
> Can anyone tell me the technique used to measure the calibration 
> between the number of electrons on the gate of the output FET and ADC 
> counts for a typical CCD Camera?
> 
Gerry Luppino has already told you the best way to do it. The alternative is 
the 'photon-transer curve' technique; this was basically described in:
Mortara & Fowler, 1981, Proc SPIE 290, 28.

We use both techniques, and they agree with each other. The x-ray technique 
works best if you have an x-ray source; the disadvantage is that you need the 
x-ray source inside the CCD camera head, or the other side of a thin 
Beryllium window.
If you want to know more give me a call.

Regards, Paul J
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