Free mirror testing

Don't know who out there has seen this:
http://www.wodenoptics.com/freetest.html
Anyone sending in their mirror? My Meade 8" mirror is now about 10 yrs old,
and the Aluminum coating is flaking off from the edges badly, Would this
adversely effect an optical test? I would not have time to get this recoated
and sent to Woden by the Nov cut off time.
Any comments?
Clearskies!
Orion

"Orion" wrote in
:

Don't know who out there has seen this:
http://www.wodenoptics.com/freetest.html

Any comments?

Let's hope they test better than they type :-)

--
Pierre Vandevenne - DataRescue sa/nv - www.datarescue.com
The IDA Pro Disassembler & Debugger - world leader in hostile code analysis
PhotoRescue - advanced data recovery for digital photographic media
latest review: http://www.pcmag.com/article2/0,1759,1590497,00.asp

Orion wrote in message ...
Don't know who out there has seen this:
http://www.wodenoptics.com/freetest.html
Anyone sending in their mirror? My Meade 8" mirror is now about 10 yrs old,
and the Aluminum coating is flaking off from the edges badly, Would this
adversely effect an optical test? I would not have time to get this
recoated
and sent to Woden by the Nov cut off time.
Any comments?
Clearskies!
Orion




what is "Woden Optics" ? Never heard of it . It's not Torus Optics Nova or
Zambuto , or else people would know .
I wouldn't send any object I actually paid for with time or money to just
some unknown website . What if my mirror never makes it back ? What if this
Woden Optics is just some startup that will vanish tomorrow and leave my
mirror in their storage due to not having paid the rent (I'm not assuming
any ill intentions, but things happen with very small companies) ? What
testing is done there, what test equipment, what test method is used ? Could
be the largest and most expensive Zygo or a home made "wooden' Foucault
tester , it's not stated, not shown and not known . And besides, why would a
reputable optician who is busy making money bother with this type of free
work ? Who would benefit ? I just don't see how the economics of this could
work, unless the said optician I'm assuming placed the ad actually would
skew the test results to convince people to have their mirrors refigured by
woden optics . It just looks too risky , I'm looking forward to learning
from other people's experiences before doing such a thing .

best regards,
matt tudor

"Pierre Vandevenne" wrote in message
...
"Orion" wrote in
:

Don't know who out there has seen this:
http://www.wodenoptics.com/freetest.html

Any comments?

Let's hope they test better than they type :-)

Caveat emptor...

--
Jan Owen

To reach me directly, remove the Z, if one appears in my e-mail address...
Latitude: 33.662
Longitude: -112.3272

"Orion" wrote in message
...
Don't know who out there has seen this:
http://www.wodenoptics.com/freetest.html
Anyone sending in their mirror? My Meade 8" mirror is now about 10 yrs
old,
and the Aluminum coating is flaking off from the edges badly, Would this
adversely effect an optical test? I would not have time to get this
recoated
and sent to Woden by the Nov cut off time.
Any comments?
Clearskies!
Orion

It is better to test the mirror uncoated anyway, so you could strip it and
then send it in. Depending on the results, you could then refigure it
before having it coated.

Dennis

testing is done there, what test equipment, what test method is used ?
Could
be the largest and most expensive Zygo or a home made "wooden' Foucault
tester , it's not stated, not shown and not known . And besides, why would
a

The Foucault test is very accurate when done by someone skilled, and the
material out of which it is made has nothing to do with it. Also, the
possession of a Zygo printout is no guarantee that that instrument was
properly used. There may or may not be issues/problems with the mirror test
offer, but I don't think that Foucault/Zygo is one of them.

Dennis

Dennis Woos wrote in message ...
testing is done there, what test equipment, what test method is used ?
Could
be the largest and most expensive Zygo or a home made "wooden' Foucault
tester , it's not stated, not shown and not known . And besides, why
would
a

The Foucault test is very accurate when done by someone skilled, and the
material out of which it is made has nothing to do with it. Also, the
possession of a Zygo printout is no guarantee that that instrument was
properly used. There may or may not be issues/problems with the mirror
test
offer, but I don't think that Foucault/Zygo is one of them.

Dennis



not sure if it was intentional or you simply didn't get my point. I'll
attempt to clarify.
I would not send my optics , pay for shipment and then make a decision , be
it to keep the optics or refigure , based on some unknown parameters, an
unknow test performed by an unknown person with an unknown equipment and
unknown skill level. I couldn't care less that Foucault COULD be very
accurate . So could interferometry . The problem is the UNKNOWN related to
the person who performs the test . Besides, this is for suckers anyway, for
people who are afraid of and have no knowledge for testing their own optics
.. Any respectable ATM-er would rather learn to test optics himself and would
have a few other buddies to double check . I hope I made it clear enough
this time .

best regards,
matt tudor

the person who performs the test . Besides, this is for suckers anyway,
for
people who are afraid of and have no knowledge for testing their own
optics
. Any respectable ATM-er would rather learn to test optics himself and
would
have a few other buddies to double check . I hope I made it clear enough
this time .

Why do you talk about "wooden" Foucault tester if it isn't germane to your
point? In any case, now you say that "Any respectable ATM-er would rather
learn to test optics himself". I don't believe that this offer is aimed at
folks who make their own mirrors, as they will only test commercial mirrors.

In fact, I do think that you raise an issue worth considering, which is the
risk inherent in sending someone a mirror. However, I think that many of us
have incurred the same/similar risk when sending a mirror for coating. I
don't know anything about Woden Optics, but it would certainly be wise to
check them out before sending them anything. Given this, it remains an
interesting and tempting offer, and I would certainly like to know the
results of the tests!

Dennis

"Dennis Woos" wrote in message
...
the person who performs the test . Besides, this is for suckers
anyway,
for
people who are afraid of and have no knowledge for testing their own
optics
. Any respectable ATM-er would rather learn to test optics himself and
would
have a few other buddies to double check . I hope I made it clear
enough
this time .

Why do you talk about "wooden" Foucault tester if it isn't germane to
your
point? In any case, now you say that "Any respectable ATM-er would
rather
learn to test optics himself". I don't believe that this offer is aimed
at
folks who make their own mirrors, as they will only test commercial
mirrors.

In fact, I do think that you raise an issue worth considering, which is
the
risk inherent in sending someone a mirror. However, I think that many
of us
have incurred the same/similar risk when sending a mirror for coating.
I
don't know anything about Woden Optics, but it would certainly be wise
to
check them out before sending them anything. Given this, it remains an
interesting and tempting offer, and I would certainly like to know the
results of the tests!

Dennis


Good! Then, send them YOUR mirror...

--
Jan Owen

To reach me directly, remove the Z, if one appears in my e-mail address...
Latitude: 33.662
Longitude: -112.3272

On Wed, 17 Nov 2004 18:53:14 -0500, "Dennis Woos"
wrote:

It is better to test the mirror uncoated anyway, so you could strip it and
then send it in. Depending on the results, you could then refigure it
before having it coated.

Or strip it and star test uncoated it on a bright star. Newtonian
paraboloids are straight forward enough with the star test.; I
routinely figure my mirrors with an uncoated glass star test.
If at one time, the mirror gave great high power images, no real
need to test it.

Dan Chaffee