Re: [ATM] new folded mirror lens

["John Sherman" <atmer@johnspics.com>]

Hi Arjan,

> These are so thin that you could mount them in a glasses frame.

I suppose you can't get a patent on that idea...

The secondary in a Cass works essentially the same as a Barlow lens in a 
Newt. A slight refocus makes the Barlow work like an eyepiece in a Galilean 
scope. So all it takes is a slight change of curve in the final reflection 
to perfectly accomodate an eyeball. You need parallel light instead of 
focusing light. When you get really good at it, could you make one that 
accomodates my astigmatism?

http://www.safepub.com/Catalog/General/eyemagn.htm for an example.

Thanks,

John




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