RE: [ATM] More on my Mak-Cass project

["Thomas" <tomjan@ozemail.com.au>]

Ah yes I see what you mean, they appear to have that shape to keep them
out of the light path, and so long as you keep them out of the wanted
light's path you can make them straight cylinders etc. Do you get what I
mean?

Clear skies,
Thomas Janstrom
http://www.tjanstrom.com
http://www.norsewines.com.au
"Your nobody untill you've been ignored by your seventh cranio-facial
nerve."


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of David Whysong
Sent: Saturday, 26 June 2004 5:56 AM
To: atml
Subject: [ATM] More on my Mak-Cass project


A few basic ideas are on my web site:

http://www.physics.ucsb.edu/~dwhysong/mak/

I'm getting into the hard details now, and I'd like to pose a question
to the list. It might be helpful to look at the following schematic that
was sent to me:

http://www.physics.ucsb.edu/~dwhysong/mak/my_mak.jpg

My question concerns the baffle tubes. In the schematic, they are solid
pieces with triangular cross-sections. I was thinking of making them
simple, straight tubes and adding knife-edge baffles (to the outside of
the primary / inside of the secondary baffle) to stop glancing
reflections from slightly off-axis light sources. But I am worried that
this could backfire and cause ghosting. Any suggestions?

The optics will be quartz, and should hopefully cool quickly. I plan to
have a mostly open rear cell much like the AP Mak-Cass. The focuser will
be external. There will be collimation adjustments for both the primary
and secondary mirrors, while the meniscus will be fixed.

Comments?

-- 
David Whysong
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