[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [ATM] convex secondary


On Fri, 4 Mar 2005 08:01:39 -0500 "Jonathan Lavoie"
<atm@lavoielactee.net> writes:
> 
> ----- Original Message ----- 
> From: "Mike Lockwood" <melockwo@uiuc.edu>
> To: <atm@atmlist.net>
> Cc: "Jonathan Lavoie" <atm@lavoielactee.net>
> Sent: Thursday, March 03, 2005 12:07 PM
> Subject: Re: [ATM] convex secondary
> 
> 
> >
> >> I heard of another test for convex but can't remember where. The 
> idea was 
> >> to test from the back through a liquid of similar refraction 
> index that 
> >> is in contact with the back surface, and just do standard 
> foucault 
> >> measurement. Anyone heard of it?
> >

Jonathan, the old ATM Advanced describes this method.  A short article
"Testing Convex Spherical Surfaces" by King starts on page 269 in my 1937
edition.  Included is a list of various liquids and their refractive
indeces.

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