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rv6n6r(at)comcast.net
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alexpeterson(at)earthlink
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 Posted: Fri Mar 03, 2006 4:56 pm Post subject: borescopes |
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Randall, I would try to find out the number of fibers (pixels) that each
has, or at the very least, have a look through one if they stock them at
their stores. Good scopes of this sort are almost 10x that price. I plan
to buy a used endoscope from a surplus medical equipment supplier here in
town. I believe that I can get a flexible one with a light source for
around $200 or less. The brightness of the light is more important than it
might seem.
Alex Peterson
RV6-A N66AP 721 hours
Maple Grove, MN
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dburton(at)nwlink.com
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| Posted: Sat Mar 04, 2006 7:47 am Post subject: borescopes |
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Good advice from Alex. I think the Harbor Freight borescopes use acrylic
fibers. I may be wrong about that, but it is common on inexpensive scopes
like this. I would at least examine the medical device idea. Take a look
at ebay for endoscope and you should see both rigid and flex scopes. A
medical scope will give you the best optical performance by far, but the
illuminator is a separate component and is an additional expense. It also
is less portable and more complicated to use.
The flexible endoscopes are great. The end articulates through 180 degrees,
controlled by the handpiece, so you can see the entire area you are
interested in, and the insertion tube is often four feet long. It's common
for the sheath, the rubber part of the insertion tube to become damaged.
This must be repaired before it can be used on a patient but would have no
effect on the use you entend. Often the medical facility will decide to
dispose of the scope instead of repairing it, and they end up on ebay. You
also find scopes that have broken fibers which causes dark spots in the
field of view. This is common and a brand new scope will often have a few.
The repair of this is $4000 or so depending on the scope if it gets bad
enough and you can often find a perfect scope that has been disposed of
because this. If you go this route, don't purchase a scope with a cloudy
field of view. There is no repair possible without completely disassembling
the scope and usually replacing parts. I use a rigid scope which has
limitation on what you can see, but has the advantage of fitting through 1/8
inch hole. A flex scope will require more like a 1/2 inch access hole.
Good luck!
---
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gert.v(at)sbcglobal.net
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| Posted: Sat Mar 04, 2006 8:24 am Post subject: borescopes |
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Great advise, i would want to add that if u get a rigid one, get one
with an agled view, rather that straight, this will alllow u to rotate
the borescope and get some means of circumferential view rather than
only straight ahead.
mine has a 30 degree angle at the tip.
Also, as illuminator i bought a single LED flashlight for a few bucks,
took the lens out and made a plastic spacer to fit between the nipple on
the scoop and the inside of the flash light. seems to work quite okay so
far. not as bright as a real illuminator light source, but, a heck of a
lot more transportable.
David Burton wrote:
[quote]
Good advice from Alex. I think the Harbor Freight borescopes use acrylic
fibers. I may be wrong about that, but it is common on inexpensive scopes
like this. I would at least examine the medical device idea. Take a look
at ebay for endoscope and you should see both rigid and flex scopes. A
medical scope will give you the best optical performance by far, but the
illuminator is a separate component and is an additional expense. It also
is less portable and more complicated to use.
The flexible endoscopes are great. The end articulates through 180 degrees,
controlled by the handpiece, so you can see the entire area you are
interested in, and the insertion tube is often four feet long. It's common
for the sheath, the rubber part of the insertion tube to become damaged.
This must be repaired before it can be used on a patient but would have no
effect on the use you entend. Often the medical facility will decide to
dispose of the scope instead of repairing it, and they end up on ebay. You
also find scopes that have broken fibers which causes dark spots in the
field of view. This is common and a brand new scope will often have a few.
The repair of this is $4000 or so depending on the scope if it gets bad
enough and you can often find a perfect scope that has been disposed of
because this. If you go this route, don't purchase a scope with a cloudy
field of view. There is no repair possible without completely disassembling
the scope and usually replacing parts. I use a rigid scope which has
limitation on what you can see, but has the advantage of fitting through 1/8
inch hole. A flex scope will require more like a 1/2 inch access hole.
Good luck!
---
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