Re: [ATM] Astig. due to gravity

["Scott Milligan" <starzkey@charter.net>]

Step one: borrow friendly, but somewhat dim-witted neighbor's chain-saw
Step two: cut hole through living room floor approximately 1 meter wide,
leading to test area in basement of house
Step 3: ditto your master bedroom
Step 4: use same chainsaw to re-enter house after wife locks you out, pick
up divorce papers, conveniently co-located beneath current issue of Sky &
Tel
Step 5: loop to 4 "reality check"
Step 6: break, EOF, "GAME OVER"...

Oops.. I omitted the step where you achieve test results showing lambda/100
figure accuracy on that piece of pie-plate you've been slaving over.

Grins all around,


Scott Milligan 



-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
Russell Jocoy
Sent: Wednesday, March 05, 2008 8:02 PM
To: ATM list
Subject: [ATM] Astig. due to gravity


To all,   Placing a mirror on a test stand "vertically" is traditional. This
is a test of the mirror's surface and an idea of where you need to proceed
to in polishing or figureing, We all know this.
   30 years ago mirror thickness was kind of standard, you know the thicker
the better. This also eliminated complicated supports.  Now we are looking
at thinner disk's propped up as the old thick disk's...what do you get,
droop of the glass, ie, Astigmatism.  Why not support the disk as if you had
mounted it in a scope.. Lean the mirror back with enough support to come
close to PLOP.... Then test..I believe you will see another animal...Just my
thought...Russ
 
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx
_________________________________________________________________
Shed those extra pounds with MSN and The Biggest Loser!
http://biggestloser.msn.com/
_______________________________________________
ATM mailing list http://www.atmlist.net/

_______________________________________________
ATM mailing list http://www.atmlist.net/