[ATM] Profilometer : Was spherometer accuracy

[Dominic-Luc Webb <dlwebb@canit.se>]

Typing in "profilometer" in Google image search (7th page), there 
is a picture that looks like a topo map of a mirror. Below is 
the (very lengthy) link. Note that the profilometer seems to 
be used as part of the optical system doing science 
rather than merely as a test device for making a mirror. The 
device shown here uses two mirrors in an interference config to 
detect gravitational waves and ripples in space-time!!! I am 
still trying to figure out how this works and how the gyros fit 
in exactly. I could guess this would draw a lot of interest in 
this group.

Dominic-Luc Webb - see link below

http://images.google.com/imgres?imgurl=http://www.pparc.ac.uk/
frontiers/archive/images/10u03a.jpg&imgrefurl=http://
www.pparc.ac.uk/frontiers/archive/
update.asp%3Fid%3D10U3%26style%3Dupdate&h=200&w=200&sz=6&tbnid=sVPON
218_O3t9M:&tbnh=99&tbnw=99&hl=en&start=137&prev=/
images%3Fq%3Dprofilometer%26start%3D120%26svnum%3D10%26hl%3Den%26lr%
3D%26sa%3DN
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