Re: [ATM] Thermal Mass - WAS Tees instead of triangles

[Ric Rokosz <radicell2@yahoo.com>]

--- Cary Chleborad <Cary@Chleborads.com> wrote:

>  
> There have been a couple of folks in recent years
> that have been fusing post
> and plate structure systems together.  The advantage
> of such as system is
> one can achieve the cross section of a very thick
> mirror blank at only ~1/3
> the mass of an equally thick solid blank.
>  
>  
> Now, to top it off and make it sound like an
> infomercial:
>  
> It still gets better!!!  A cellular blank is not
> only less massive and cools
> much faster; it ends up being much stiffer than and
> equally thick and solid
> blank.  Furthermore if the cellular blank is made by
> a full casting instead
> of fusing plates and posts the cellular structure
> can be designed to be
> totally self supporting.  The mirror then sits right
> on the collimation
> bolts!!  No more fussing with complex mirror cell
> designs!!
>  
> Now the catch!!!  No one is commercially producing
> cellular mirror blanks -
> yet....

Your last statement is way out of date.People have
done it,come and gone because of various
reasons.Hextek still grinds on,Pegasus now offers
cellulars again,various other manufacturers who don't
hang out on the atm lists such as Schott which are in
a price range way beyond the average atm, etc.There a 
few one man operations that cast a cellular type blank
but you wouldn't believe the cost.

I've talked and debated with some people on making
cellulars commericaly and as a business plan the cost
to setup and get them out the door is risky given the
small market and the need to recoup the high
production costs.

The issue of mirror cells for cellulars isn't as
simple as you make out.

Ric
 
 cellulars since 1983


		
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