re:Non-visible-light/IR focusing lenses-Si, Ge, ZiSe?

From: stevelu (sp_lussier_at_yahoo-dot-com.no-spam.invalid)
Date: 01/15/05 

Date: 15 Jan 2005 01:30:26 -0600

whoops, that was me. (Share a machine, check the login status-es.)

So, yeah, not much to go on: just the labels on the big metal tube
(which focuses a bit). It is about 14" long, and has three sections:
two end pieces about 5 1/2" in diameter and a longer central tube more
like 6" across. An unlabeled scale with zero at the midline wraps
halfway around one end of the middle section. There is a small
cap/screw/vent that can be removed and a couple of hex wrench
adjustment points.

The official looking/manufacturing label is from OSTI, Optical
Systems and Technology Inc of Bedford Mass, with a serial number
("001"!) and model number.

The key is presumably the clear tape label, which has "B.S. #2-91% R"
on it. That must mean something to someone.

Oh yeah, and the other key may be the spot where a label was removed.
In the right light the letter RAYTHEON can still be made out in the
adhesive.

I found both Astro and Electrical Engineering refs searching under
'chopper infrared [etc]'.

Some sort of high-energy work, I presume.

Okay, I gotta ask, what are the odds this thing is hot? I.E.,
somewhere noticably above the background level in terms of
radioactivity? Assuming the folks who used it weren't nuts and took
reasonable care of their equipment, I mean. My boss suggested
testing it with proximity to a blank roll of film....

Thanks for your help, everyone.

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