From: "Richard F.L.R. Snashall" 
To: atmlist 
Reply-To: "Richard F.L.R. Snashall" 




Bob May wrote:

> glasses at the ends.  Remember that the reflectance occurs when you change
> the refractive index (RI) and is 0 at a 0 change of RI.  Thus, a cemented
> lens set with a cement that has approximately the RI midway between the two
> lenses will have very little reflection in the middle of the lens set - a
> reason why cemented lenses are so desirable for many.

That brings up a question.  In AR coatings, I believe it is a half-wave of
material that gives minimal reflection.  What if you made the cement a
half-wave thick?  Would that reduce the reflections even further?

                Rick S.

> Bob May
> http://nav.to/bobmay
> bobmay{at}nethere.com
> NEW! http://bobmay.astronomy.net
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