[ATM] Mirror cell design for "web-back" lightweight mirror blank

["Nate Jones" <njones@newlintech.com>]

Hello ATM list,

 

After a long break from telescope making (first mirrors made were 10" f/6
and 6" f/5) I recently purchased a 16 inch "web-back" Pyrex blank from
United Lens Co.  I am currently polishing and it is coming along nicely.

 

I realized there may be an issue using a standard mirror cell design as
there are ribs in the back (eight of them) leading to a central ring of
glass, putting the support points under areas that are in the pockets.

 

Has anyone used these blanks, and if so what type of mirror cell was used?

 

Thanks,

--Nate

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