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

[Mark Suchting <masuch@cia.com.au>]

At 07:48 PM 8/15/2004 -0500, Nate Jones wrote:

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

Nate,

This blank should be very rigid as it is full thickness but lightweight. If 
you grind the back ribs nice and flat I'd imagine it would sit on a ring of 
thin rubber on a flat back plate  at the 60- 70% zone and hold a nice 
figure. A 40mm  thick 16" mirror mounts well this way so the thick 16" 
should do even better   And there is always Velcro. My 14"  X  1.5" is held 
in its cell with nothing more than a ring  of 1" Velcro squares at the 60% 
zone. Returns a perfect star test and holds collimation very well.

Mark 

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