Re: [ATM] Lens Wedge

["Bob May" <bobmay@nethere.com>]

Interesting that these thoughts about lens wedge are coming up
now.  One of my students is working on a Houghton and the lenses
are about to be started on and the wedge in each of them is about
0.003" in each of them for a 13" lens.  I want the lenses to have
less than a thou of wedge in order to be happy.
The way that I look at it is that with wedge, you can consider
the perfect lens and then add a wedge of that angle and thickness
of 0 at one end into the lignt path at or near the lens and
calculate how much this affects the image.  I just did a quick
check with OpticsLab and, with a .1deg. wedge in the path,
Without any values, you can spot the different colors have been
shifted a bit with that much of a wedge.
Bob May
bobmay at nethere.com
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