Re: ATM Metal Mirrors

[Andy Saulietis <iss@pvtnetworks.net>]

Pete Brooks writes,

>Oh, one thought on metal mirrors.  The diamond turning unit at Lawrence
>Livermore labs does some metal mirrors (aluminum, I think) that come out
usable
>straight from the lathe.  Not that the lathe is ordinary, but they can go
good
>work.  IIRC, they did a secondary for the Keck out of aluminum.  There
services
>are available to the well-heeled customer....

This technology is a by product of the "Star Wars" project.
All-metal mirrors are useful for redirecting high power
lasers, the substrate has high conductivity & can be
effectively with liquids & other methods. The thermal
gradients are much reduced so the mirror distorts less as well.

It certainly would make it simpler, for ATM's, to control
the temperature of their optics near ambient air..:)

IIRC the interferometer controlled turning accuracy capability is something
like 1/2 wave surface im ~24" diameter, good for IR but not
visual. It's not be cheap because of the high cost of the tooling
and low quantities needed.

 



   
Andy Saulietis
ISS Enterprises
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e-mail: iss@pvtnetworks.net