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Giving Up for the Night
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- Subject: Giving Up for the Night
- From: Tom Droege <email@example.com>
- Date: Sun, 11 Oct 1998 21:52:04 -0500
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- Resent-Date: Sun, 11 Oct 1998 23:00:23 -0400
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Great progress. I think we almost have a camera. I will have to figure
out how to cool it just a little more. Probably use an old refrigreator
and a water tank to rout the cooling water through. About 10 C cooling
water should do it.
A little pink foam around the CCD and it got just enough colder so that I
could make longer measurements.
I keep trying to do the experiment of making various length dark frames to
try to extrapolate back to a zero length exposure. I almost had it done.
But I keep finding sources of noise pick up. AC noise tends to give three
peaks on a distribution. "Image Scientist" turns out to be a useful tool
to hunt for noise. I keep turning off lights and unplugging soldering
irons and grounding things and the noise keeps going down. So I never get
the experiment done. The electronics is spread all over the work bench,
and is not in a shield box. Not the way to do low noise work.
But folks, there is no doubt, we are going to have a camera good enough for