[ATM] Additional phase contrast and Foucault images

[Dale Eason <atmpob@yahoo.com>]

Here are more phase contrast images.

This one is my own 8 inch mirror I polished by hand. 
It shows some surface roughness in the Foucault image.

http://home.comcast.net/~doeason/Phase_contrast/8inch.jpg

The next is an 18 inch high quality mirror.  The
Foucault image is very smooth.  The vertical steaks in
the image are due to dust in the Foucault imaging
optics.


There is much dust on this one and the large streak
from about 9 o'clock to 6 o'clock in the phase
contrast image is where some of it was cleaned off by
something rubbing against the mirror.

http://home.comcast.net/~doeason/Phase_contrast/18inchomi.jpg

Dale Eason

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