[ATM] Suggestions for a "focus screen" for an optical test bench.

["Thomas Janstrom" <tomjan@ozemail.com.au>]

Hi All,

Just trying to find a suitable material to use as the screen that a lens
under test will focus onto, I'm thinking of using an eye piece to
examine the image formed to find the "exact focal length" at a given
frequency. However I'm stumped for a suitable material that is
translucent, uniform, and thin enough to enable the examination of the
image formed from the rear of the screen....

I will be working at the following lines (just incase this has any
impact on the material to be used): d, C, e, F', and g.

Clear Skies, Thomas.
www.tjanstrom.com
www.norsewines.com.au 

 

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