Re: [ATM] Re: ATM chinese puzzler

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

This is funny, sort of. It was amazing to me that
there was no feedback at all to the person who was
actually pushing the glass...

Guy

--- "Donald \"Don\" Ware" <mimas@charter.net> wrote:
> About a year ago I needed a mirror with a short RoC
> to demonstrate Foucault
> testing.  I ordered a 6" f/5 1/4 wave PV parabolic
> mirror from a company in
> Tennessee.   It was obviously of Far East origin
> judging by the paper it was
> wrapped in.  The figure was the worst commercial
> mirror I've ever seen.
> 
> Essentially an oblate spheroid with a deep hole in
> the center.  Strehl of 0.05.
> Company allowed me to exchange it, but the second
> one was just as bad.
> Useless for demonstrating Foucault as there was no
> obvious pattern to the zone
> intensities.
> 
> Perhaps the mirrors signaled to go in one direction
> went to M**e, C****n, etc. and
> the ones in the other direction to Tennessee.  That
> way the operators wouldn't
> need to know what the tester's decision was.
> 
> Don Ware
> Hollis, NH
> http://webpages.charter.net/dware1/


=====
Guy  BrandenburgWashington, DChttp://home.earthlink.net/~gfbranden/GFB_Home_Page.html

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