night vision !?

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Article #22305

#22305

From: Morten Tolboel
Date: Tue, 20 Feb 1990 12:47

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Some time ago I was in the army. We had a demonstration of
a small "night vision"-device. You could attach it to your
helmet and *BINGO* night was turned into day !!! It used
small penlight batteries which worked for quite a long time.

QUESTION: how does this thing work? Is it a very sensitive
CCD camera or what ? (it was a passive system!)
Why is it so damn *EXPENSIVE*  ? (the price we were told was 
$18000 - $20000; no wonder it isn't standard equipment :-)

/Morten Tolboel

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!aplcen!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!think!snorkelwacker!bloom-beacon!eru!luth!sunic!dkuug!iesd!iesd.auc.dk!tolboel
From: tolboel@iesd.auc.dk (Morten Tolboel)
Newsgroups: sci.electronics
Subject: night vision !?
Message-ID: <1990Feb20.124704.13677@iesd.auc.dk>
Date: 20 Feb 90 12:47:04 GMT
Sender: tolboel@iesd.auc.dk (Morten Tolboel)
Reply-To: tolboel@iesd.auc.dk (Morten Tolboel)
Organization: Mathematics & Computer Science, University of Aalborg
Lines: 12