I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp end.
And a dome cut from the top of a clear lens LED. Both ground down , finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and white
grid. Any ideas , or a total waste of time. The fibres are coarse 10 thou
diameter , but just giving it a go.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Suggest you cross-post to the wider s.e.* groups. Might get better response
from the engineering population...

Good luck,
--
Al, the usual

Usual Suspect ) writes:
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Suggest you cross-post to the wider s.e.* groups. Might get better response
from the engineering population...


No, not cross-post. He shouldn't have posted a non-repair question in
a repair newsgroup.

Before he posts again, he should read Mark Zenier's guide to the hierarchy,
ftp://ftp.eskimo.com/u/m/mzenier/seguide9706.txt
and then determine the most appropriate newsgroup before he posts again.

There is virtually no reason for someone to cross-post. It's usually
laziness.

Michael

In article , "N Cook" wrote:
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp end.
And a dome cut from the top of a clear lens LED. Both ground down , finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and white
grid. Any ideas , or a total waste of time. The fibres are coarse 10 thou
diameter , but just giving it a go.


I was doing some work here with fibers. I was going to make some couplers for
LEDs. Still in the works. I got something like 50 feet of bundled fibers. They
were just floating so i could do anything i wanted. By epoxying the ends, then finely polishing
the ends, I could get good light transfer, but far from optimum. The process needs
tweaked by be. I also had an assembly made, and the polishing is so much better
than by me. These assemblies have the fibers in not perfect order I'm sure it takes special
layout to be able to keep an image intact. First you need good terminated ends, good lens
conversion, then, good continuity.

greg

N Cook wrote:
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp end.
And a dome cut from the top of a clear lens LED. Both ground down , finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and white
grid. Any ideas , or a total waste of time. The fibres are coarse 10 thou
diameter , but just giving it a go.


You could buy one of these if you had enough work to justify one.
http://www.dartsystems.co.uk/shop/pr...roducts_id=175

How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?

Ron(UK)

Ron(UK) wrote:


How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?

I`m presuming that it`s needed to inspect the positioning of the violins
tone post?

Ron(UK)

Ron(UK) wrote in message
...
N Cook wrote:
I had a go today but failed , any ideas? A violinist, I know, asked
about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of
those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp
end.
And a dome cut from the top of a clear lens LED. Both ground down ,
finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of
focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and
white
grid. Any ideas , or a total waste of time. The fibres are coarse 10
thou
diameter , but just giving it a go.


You could buy one of these if you had enough work to justify one.
http://www.dartsystems.co.uk/shop/pr...roducts_id=175

How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?

Ron(UK)

How small ? without going into 007 territory, do you reckon the lens plus
CCD is (assuming this is separatable and can be extended) for a standard
webcam or CCTV camera.
I did do similar, ages ago, to make a printing microfiche viewer by
extending a standard fax CCD out to under an illuminated fiche viewer

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

"N Cook" wrote in :

Any ideas

Finer fibres maybe. Perhaps even glass ones, not plastic.
Plus better coating to keep them from cross interfering.

N Cook wrote:
Ron(UK) wrote in message
...
N Cook wrote:
I had a go today but failed , any ideas? A violinist, I know, asked
about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of
those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp
end.
And a dome cut from the top of a clear lens LED. Both ground down ,
finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of
focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and
white
grid. Any ideas , or a total waste of time. The fibres are coarse 10
thou
diameter , but just giving it a go.

You could buy one of these if you had enough work to justify one.
http://www.dartsystems.co.uk/shop/pr...roducts_id=175

How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?

Ron(UK)

How small ? without going into 007 territory, do you reckon the lens plus
CCD is (assuming this is separatable and can be extended) for a standard
webcam or CCTV camera.
I did do similar, ages ago, to make a printing microfiche viewer by
extending a standard fax CCD out to under an illuminated fiche viewer


I have a colour camera and lens which the pcb is less than half an inch
across, possibly just small enough to poke through the f hole of a
violin. The lens screws in and out for focusing, and can get pretty
close up, you'd need a strong light source as well, probably a hi
brightness led would do it.

How do professional violin repairers do it?

Ron(UK)

In article , Gary Tait wrote:
"N Cook" wrote in :

Any ideas

Finer fibres maybe. Perhaps even glass ones, not plastic.
Plus better coating to keep them from cross interfering.

I thought myself that plastic would work. I bought a roll of fishing line to experiment.
it does not work at all. Glass or other materials are needed. Also bought some really good
fiber, but it was so expensive I could not get enough coverage. The better fibers are
individually coated. I looked through some light source assemblies, but the fibers don't always form
a correct pattern. You can buy these relatively cheaply, but they are not ideal.

greg

(Michael Black) writes:

Usual Suspect ) writes:
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Suggest you cross-post to the wider s.e.* groups. Might get better response
from the engineering population...


No, not cross-post. He shouldn't have posted a non-repair question in
a repair newsgroup.

Before he posts again, he should read Mark Zenier's guide to the hierarchy,
ftp://ftp.eskimo.com/u/m/mzenier/seguide9706.txt
and then determine the most appropriate newsgroup before he posts again.

There is virtually no reason for someone to cross-post. It's usually
laziness.

Nonetheless, his question is valid and broadening one's experiences can't
hurt.

A totally optical endoscope uses what's called a "coherent optical bundle".
This has 100s of thousands of fibers arranged in exactly the same pattern
at both ends. That's why they cost 10s of thousands of dollars.

Google: "coherent optical bundle" or something like that. Or, "endoscope"
for that matter.

Many newer ones use miniature CCD cameras.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

"Ron(UK)" writes:

Ron(UK) wrote:


How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?

I`m presuming that it`s needed to inspect the positioning of the violins
tone post?

Inspecting the sound post would be one reason, though I guess it could also
be to inspect for internal damage.

Not sure how much better that would be than a small 45 degree mirror though.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

"N Cook" wrote in message
...
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Try a place that sells auto repair tools or mechanics tools.

In article Flw_h.1678$Vi6.978@edtnps82, says...

"N Cook" wrote in message
...
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Try a place that sells auto repair tools or mechanics tools.




Ya know, I bought a spy camera on E-Bay for about 100 bucks CDN. It is
about the size of pezio buzzer, and runs off a 9V battery. It is also
wireless. I was going to put it in a bottle attached to a kite to take
aerial shots at the beach I go to, and then I was going to mount it in
my model train engine, for a forward view.

Check out E-Bay, they are probably still selling them...

- Tim -

In article Flw_h.1678$Vi6.978@edtnps82, says...

"N Cook" wrote in message
...
I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.

Try a place that sells auto repair tools or mechanics tools.




Ya know, I bought a spy camera on E-Bay for about 100 bucks CDN. It is
about the size of piezo buzzer, and runs off a 9V battery. It is also
wireless. I was going to put it in a bottle attached to a kite to take
aerial shots at the beach I go to, and then I was going to mount it in
my model train engine, for a forward view.

Check out E-Bay, they are probably still selling them...

- Tim -

Sam Goldwasser wrote:
"Ron(UK)" writes:

Ron(UK) wrote:

How about something using a miniature camera innards mounted on a mini
gooseneck if it doesn`t have to be steerable?
I`m presuming that it`s needed to inspect the positioning of the violins
tone post?

Inspecting the sound post would be one reason, though I guess it could also
be to inspect for internal damage.

Not sure how much better that would be than a small 45 degree mirror though.

From my vcr repairing days (remember those?) I still have a dentists
mirror taped to a pen light. I guess you you easily mount a small bullet
camera to look at the mirror in the same way or modify some small
optical toy or device.

Ron(UK)

"Tim" wrote in message


Ya know, I bought a spy camera on E-Bay for about 100 bucks CDN. It is
about the size of piezo buzzer, and runs off a 9V battery. It is also
wireless. I was going to put it in a bottle attached to a kite to take
aerial shots at the beach I go to, and then I was going to mount it in
my model train engine, for a forward view.

Check out E-Bay, they are probably still selling them...

What keywords were in your auction title?


--

Reply in group, but if emailing add another
zero, and remove the last word.

"Tim" wrote in message


Ya know, I bought a spy camera on E-Bay for about 100 bucks CDN. It is
about the size of piezo buzzer, and runs off a 9V battery. It is also
wireless. I was going to put it in a bottle attached to a kite to take
aerial shots at the beach I go to, and then I was going to mount it in
my model train engine, for a forward view.

Check out E-Bay, they are probably still selling them...

Like this one?

http://cgi.ebay.com/ws/eBayISAPI.dll...m=200103385953



--

Reply in group, but if emailing add another
zero, and remove the last word.

In article ,
lid says...
"Tim" wrote in message


Ya know, I bought a spy camera on E-Bay for about 100 bucks CDN. It is
about the size of piezo buzzer, and runs off a 9V battery. It is also
wireless. I was going to put it in a bottle attached to a kite to take
aerial shots at the beach I go to, and then I was going to mount it in
my model train engine, for a forward view.

Check out E-Bay, they are probably still selling them...

Like this one?

http://cgi.ebay.com/ws/eBayISAPI.dll...m=200103385953




No, mine was much smaller than that. More like these ones;

http://cgi.ebay.ca/Twin-Wireless-Pin...Spy-Nanny-Cam-
CCTV_W0QQitemZ110122427509QQihZ001QQcategoryZ48632 QQrdZ1QQcmdZViewItem

I see they are much cheaper now, and this particular auction is for a 2
camera setup. My seller was Chai Po Ying.

His email was in May of 2002 anyways

- Tim -

There are some cheap endoscopes on E-Bay US for about $130 USD from a
seller in Tokyo:


HandyScope 351L Tool Endoscope - Borescope - Fiberscope
http://myworld.ebay.com/ebaymotors/tanboman/













N Cook wrote:

I had a go today but failed , any ideas? A violinist, I know, asked about
such an inspection viewer, small and flexible.
My attempt started with a clump of plastic optical fibres from one of those
lamps with a rotating colour wheel and epoxyied into a lump on the lamp end.
And a dome cut from the top of a clear lens LED. Both ground down , finer
grit, until toothpaste on paper. LED , as a fish-eye lens, sort of focused
the sun at about 5mm so focal length 5mm. Tried fixing lens 5mm and then
10mm from the ground fibres surface and blanked off remaining area.
The other free ends of the fibres grouped as they came so not fully 1:1
mapping but no change of image viewing when moving over a black and white
grid. Any ideas , or a total waste of time. The fibres are coarse 10 thou
diameter , but just giving it a go.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/






--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P

"Ron(UK)" wrote in
:


How do professional violin repairers do it?

Ron(UK)
A dentist's mirror.