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Wed Jun 4 16:57:12 2008
Dark images from cameras (electronics noise measurement)
The attached pdfs are 1 second and 1 millisecond long integrations from the GC650 and GC750 cameras with a cap in place - i.e. no light.
They include the mean and standard deviation values.
The single bright pixel in the 1 second long exposure image for the GC650 seems to be a real effect. Multiple images taken show the same bright pixel (although with slightly varying amplitudes).
The last pdf is a zoom in on the z-axis of the first pdf (i.e. GC650 /w 1 sec exposure time).
I'm not really sure what to make of the mean remaining virtually fixed for the different integration times for both cameras. I guess 0 is simply offset, but doesn't result in any runaway integrations in general. Although there are certainly some stronger pixels in the long exposures when compared to the short exposures.
Its interesting to note the standard deviation actually drops from the long exposure to the short exposure, possibly influenced by certain pixels which seem to grow with time.
The one with the least variation from its "zero" was the 1 millisecond GC750 dark image.
Uploaded Wed Jun 4 18:05:42 2008