This is a plot of 50 pixels from 64 frames. The frames were made with more or less constant illumination
and exposure times varying from 50 mS to 3.25 seconds, in 50 mS increments. Binning was 1x in horizontal
and vertical. The target was a barcode illuminated by a 60 W incandescent bulb, powered by California's
notoriously unstable grid. The wobbles around frame 35 are likely the fridge coming on. The curve at the
left edge is caused by smearing of the image. The shutter was removed for these tests, so the signal from
smear is a larger percentage of the total signal at shorter exposures.
In this plot the vertical axis is signal in ADU, and the horizontal axis is exposure time. Each line represents
a single pixel with exposure time increasing to the right.
The plot below is the group of pixels from all 64 frames, displayed on top of one another. In this plot, the
vertical axis is signal strength in ADU, and the horizontal axis is pixel position on the CCD. Each line represents
one exposure time across the line of pixels.
