RE: [ATM] Banishing the diagonal

["Cord Scholz" <cord@astro-image.com>]

Art, it has already been done:  http://www.astroworks.com/index.html
They suggest to use watercooling, but I wonder wether it's possible to
mitigate the heat problem by using a huge fan that is separated from the
scope - that should instantly destroy any image degrading pockets of warm
air, no?

Cord



-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
artbianconi@blast.net
Sent: Thursday, August 26, 2004 6:40 AM
To: atm@atmlist.net
Subject: [ATM] Banishing the diagonal

Hello Gary,

I've been following this string with interest and it occurs to me that
before too much longer, secondary mirrors will likely all but disappear from
the OTA. 

It's inevitable that as CCD receptors improve their resolution, there will
come a time when you can place one precisely at the focal point of the
primary, capture the entire image and send the signal to a high definition
TV after putting it through software enhancement.

Art

Hello,

I've been considering (from a perspective of almost no 
knowledge) the problem of minimizing the secondary 
obstruction in a standard Newtonian design. Could the 
following work:

Place a lens immediately alongside a much smaller than usual
diagonal so that the cone of light, hitting the diagonal at
approximately focus, would be refocused to a point comfortably
outside the tube.

If this wouldn't work - and I mean "work" in a practical, do-
able, giving comparable results to the standard methods, way, why
not?

Thank you,

Gary Fuchs



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