[ATM] Fwd: [capitalastronomers] completed mirror figuring

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

--- Guy Brandenburg <gfbrandenburg@yahoo.com> wrote:
> To: capitalastronomers@yahoogroups.com
> From: Guy Brandenburg <gfbrandenburg@yahoo.com>
> Date: Sat, 30 Apr 2005 16:45:55 -0700 (PDT)
> Subject: [capitalastronomers] completed  mirror
> figuring
> 
> Joe Martin finished his 6 inch mirror last night at
> the CCCC/NCA telescope-making workshop. It is
> stunning! The figure, as seen via a Ronchi grating,
> is
> perfect, and couder-mask numerical testing shows it
> to
> be better than one-twelfth wave accuracy on the
> light
> wavefront. He should be, and is, proud.
> Aluminization
> is next week.
> 
> We had not one, not two, not three, but four new
> people to visit last night, including an amateur
> telescope maker from England, who had emailed me a
> few
> weeks earlier, since he wanted to see what amateur
> telescope making was like here in the US and was
> going
> to be in DC for a conference on another topic. We
> also
> had a visitor who had participated for quite some
> time
> in the Chabot telescope-making workshop in Oakland,
> CA. I never had known that Chabot was pronounced
> 'Sha
> - BOE'. At the Chabot, apparently after they work on
> their mirrors on Friday nights, then they go look
> through an amazing 20-inch Brashear **refractor**
> that
> is right next door. And of course, out there, the
> weather is rather seldom like it is here (rainy +
> damp).
> 
> Guy B
> 
> Guy  Brandenburg
> Washington, DC
> My home page:
>
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
> 

Guy  Brandenburg
Washington, DC
My home page:
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
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