RE: [ATM] Foucault Slit

["Richard Klappal" <klappal@xnet.com>]

Your standard autoparts store should have feeler gauges going down to as low
as you'd need.  I just mic'ed a standard sheet of Office Depot printer paper
(20# weight) at .004 inches.

Your mileage may vary.

Rich


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf
Of Rich Ball
Sent: Sunday, 22 August, 2004 08:30
To: ATM List
Subject: [ATM] Foucault Slit


Is there any common object that can be used to calibrate the slit-width on
the Foucault light source?  Should it be as wide as a the cover on a book of
matches?  (Too wide, I think.) As wide as a standard pin?  As wide as the
shaft of a push-pin?  etc. etc.  How wide is too wide?  I suppose there is
no "too narrow."

Thanks for thoughts on this.

My tester has a slit formed by 2 single-edged razor blades held in place top
and bottom by tinnerman nuts.  It's easy to adjust.  I just don't have clear
idea of what it should be.

--Rich Ball
_______________________________________________
ATM mailing list http://www.atmlist.net/



_______________________________________________
ATM mailing list http://www.atmlist.net/