------- Forwarded Message Follows -------
Date: Sat, 10 Jun 2000 13:00:54 -0700
Subject: Re: [OM] OK, I had to change the subject line - OT
Date: Sat, 10 Jun 2000 15:51:27 -0400
> Interestingly the fibreoptic glass in the flexible 'scopes is damaged
> by x-rays over time. The endoscopes are usually used under flouroscopy
> so they age by getting darker and darker until either they get re glassed
> or sold off as unserviceable. Some hospitals would have them re-fibred
> even though the cost was high because it came out of a maintenance
> budget instead of out of a capitol equipment budget which has a different
> approval route. Prior to the use of fibre optic scopes they used to use
> solid endoscopes (industrial versions are called borescopes) . The
> contortions required to use these on people was horrible!. For some
> e.n.t. (ear nose and throat) dept use they probably still use solid
> scopes whcih are cheaper,less fragile,smaller and have better optical
> quality.
What kind of quality does an endoscope have, and what kind of optics? Is it
a narrow field-of-view macro lens, or a fisheye lens?
> I have to admit to being another list member who owns an old
> endoscope. (Not Olympus) This unit is a solid unit which only has fibers
for
> the illumination section not the viewing section.
>
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