Re: [ATM] Over size laps?

[Jarvis Krumbein <jkoptic@juno.com>]

Mark, you might want to direct this question to Mel Bartels.  I seem to
remember that he discussed this at one of the Bellingham Telescope Optics
Workshops several years ago.

Jarvis Krumbein

On Fri, 18 Feb 2005 17:20:36 -0500 Mark Holm <mdholm@telerama.com>
writes:
> A few times, I have read of people using over size polishing laps.  
> At 
> least one source said it is a good way to force a sphere.  I have a 
> 
> mirror pair for a 4.25" scheifspiegler sitting, that I started long 
> ago 
> and never finished.  Getting those reliably to spheres, especially 
> the 
> convex, would be a good thing.
> 
> My question is, how do you get and keep good contact?  Can't do it 
> by 
> the usual pressing methods.
> 
> Mark Holm
> mdholm@telerama.com
> 
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> 
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