Re: [ATM] Mirror cell ramblings re: thin plate glass3/4-inchx24-inch

["Bob May" <rmay@nethere.com>]

I have trouble doing the Foucault test on benches and
interfrometry is even worse for vibrations.
Then again, if the seperate parts are sturdy enough, you can get
away with it.  I also note that you mention using fast shutter
speeds to get the vibrations out of the interfrograms tho so you
do have some problem with vibrations.  It does help tho to have
nobody walking about vibrating the floor.
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net

----- Original Message -----
From: Dale Eason <atmpob@yahoo.com>
To: <atm@atmlist.net>
Sent: Wednesday, May 28, 2008 2:33 PM
Subject: Re: [ATM] Mirror cell ramblings re: thin plate
glass3/4-inchx24-inch


> Sorry Bob but I have to take exception to that
> generalized statment.  I use two tables and it works
> very well. Actually a table and a tripod.  I have also
> taken Igrams on the second floor of a building and was
> successful because I used a fast shutter to stop the
> vibration.
>
> However air current induced see is much more of a
> problem but that is taken care of by averaging many
> analysis sets.
>
> There are usually ways to address all of the issues.
>
>
> Dale Eason
>
> --- Bob May <rmay@nethere.com> wrote:
>
> >  I'll also note that
> > you do need to
> > have a stable support for the system - no doing the
> > work with the
> > interfrometer on one table and the mirror on another
> > table.
>
>
>
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>

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