Re: [ATM] Suggestions for a "focus screen" for an optical testbench.

[Jarvis Krumbein <jkoptic@juno.com>]

Thomas, a microscope slide cover glass very fine ground on one side
should do the trick.  The glass is of high quality and very thin.  Use
the finest grind that you can,  600 carbo or finer and make sure the
ground surface is evenly ground.  Have several pieces on hand when doing
this as they break easily but after the first one or two break, you'll
get the hang of it.

Jarvis Krumbein

On Sun, 23 Oct 2005 22:24:27 +1000 "Thomas Janstrom"
<tomjan@ozemail.com.au> writes:
> Vladimir,
> 
> I'm doing it this way, because I have a bunch of near monochromatic
> light sources (at those given lines), a reticule (the pattern to be
> projected and then focused), and a 2m track to mount it all 
> on.<grin>
> 
> I will eventually mount my KE tester on this track, but for now I 
> just
> want to check some lenses with the aim to figuring out what glasses 
> they
> are made from, well at least as close I can get. Hence the need/wish 
> to
> magnify the image formed to get it as sharp as possible....
> 
> Clear Skies, Thomas.
> www.tjanstrom.com
> www.norsewines.com.au 
> 

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