[ATM] Carpet pad bump distortion on ultrathin mirror

[Dale Eason <atmpob@yahoo.com>]

I have the mirror resting back about 5 deg.  The
support at top is a 1/2 inch diameter carpet pad
typically used on some mirror cells.  The bottom
supports are pegs. I have turned off any astigmatism
terms so that you can see the effect of the carpet pad
on the 3/8 thick slumped plate glass mirror.

http://home.comcast.net/~doeason/DDavis/carpet_pad_bump.gif


The pad is inside the top edge.  You can also see the
top folding over above the pad.

The magnitude rise is small (65 nm) about 1/5 wave on
the wavefront but you can see what even a little force
from this lightweight mirror resting back at 5 deg can
cause.  Think what it must be when in a more
horizontal position.

Can anyone model similar in PLOP?

Dale Eason

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