Re: [ATM] Bath with GRIN lens

[Dale Eason <atmpob@yahoo.com>]

I have built a bath and used a bath and understand it
pretty well.
The placement of the lens in not critical in relation
to the splitter or the laser.  The whole interfeometer
platform needs to be adjustable so that lens is placed
in front of the mirror focus a few milimeters.  You
adjust this distance until you get the number of
fringes you want.  You can find a lot more info on the
Yahoo interferometry group.  We even have pictures of
the setup.

Dale Eason
--- Bob May <bobmay@nethere.com> wrote:

> One thing that I've not found the answer to on the
> Bath Interfrometer is
> where the focus point for the lens needs to be.  The
> pages that I've seen
> tend not to state where this should be.
> Should the focus of the lens be at the interface of
> the splitter, closer to
> the laser or further from it in the light path
> assuming that the light comes
> from the laser, to the beamsplitter and then to the
> lens.
> Bob May
> bobmay@nethere.com
> http://nav.to/bobmay
> http://bobmay.astronomy.net
> 
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 



		
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