Re: [ATM] Ronchi quiz

["Richard Ozer" <rozer@pacbell.net>]

OMG.  I thought my nightmares were bad!

I've seen this only once. It was on a piece of 16" BVC.  I'm racking my 
brain to remember what caused it and I think that it had been polished 
either on a warped surface or under strain.  Then again... I could be 
imagining the cause.  All I know is that we all called it the two-eyed 
mirror..

RO

----- Original Message ----- 
From: "Dale Eason" <atmpob@yahoo.com>
To: <atm@atmlist.net>
Sent: Tuesday, January 31, 2006 8:13 PM
Subject: [ATM] Ronchi quiz


>
> I thought ronchi users might like to take a stab at
> the this image.  It is from a 16 inch mirror in
> progress. It is pollished out.  Can any tell me what
> they think is going on?  I know and will tell you in a
> few days.  I wonder if anyone has ever seen anything
> like it.  The position of the ronchi screen is very
> close to the ROC.
>
> http://home.comcast.net/~doeason/DDavis/ronchi.jpg
>
> A clue is in the file name.  One other on the list
> might recognize the image.
>
> Next is a Foucault image taken at the same ROC.  It
> may help you to interpret the image.  The main purpose
> of the foucault image is to show that it is a mirror
> eventhough it has many faults.
>
> http://home.comcast.net/~doeason/DDavis/foucault1.jpg
>
>
> Dale Eason
>
>
>
>
>
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