Re: [ATM] All Spherical Telescopes

[Delyan Toshev <delyan@trirand.com>]

Bob May wrote:
> Paramythioti-Clave design sounds like an early design where the
> authoss didn't try to minimize the number of elements (may also
> have had a large scope in mind) and the multiple elements were to
> get rid of individual aberrations one at a time.  You'd have to
> go find the basic parameters they were working at to find out why
> they really had so many elements as others have done the basic
> job with 2 or 3 elements, often glued together.

Bob, this sounds logical, but in fact they (Clave, the company) claim 
quite the contrary - that this is quite new design made possible after 
they wrote custom software, which performed some "magical" optimizations 
:-) Please, excuse my irony, but the companies today are quite obsessed 
with secrecy and actually prefer publicly perceived view of their 
technology as "magical" devices :-)
Now, Clave is (or was?) very serious company, but I have not found any 
reasoning for their variant of relay corrector lens. I can understand if 
such lens are being developed for large aperture, but 166mm and 254mm, 
even 460mm are hardly called large apertures.

-- 
Regards,
Delyan
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