Re: ATM pitch mold, opinions needed

[Kevin Whitefire <chaosopher23@yahoo.com>]

I didn't get any zonal aberrations.  No holes, no flat
spots.  I got the turned-out horn of a hyperbola
averaging -1.7 through the whole figure.  I guess I
overparabolized from the start, using a parabolizing
stroke when I started polishing.

>From now on, I start with a spherizing stroke and then
parabolize.

Kevin

--- Bob May <bobmay@nethere.com> wrote:
> 
> Another way to play that game!  Now we will be
> having people cast dollops of
> pitch and pour them onto the tool and heat them up.
> That is a neat idea for making the lap tho and it
> probably helps a lot
> making the grooves random which will help decrease
> the zoning of a mirror
> surface.
> Bob May
> http://nav.to/bobmay
> bobmay@nethere.com
> NEW! http://bobmay.astronomy.net
> 
> 
> 


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/