Re: [ATM] Schmit corrector grinding

[Dominic-Luc Webb <dlwebb@canit.se>]

I would be interested in your sources of info on this topic,
if this is possible. I enjoy reading on this subject and
once in a while find people have used sources I was not
aware of.

500 grit sound close to what I use. The curve on these
correctors is usually very small. Consider one of my
Schmidt designs using rather strong curve (primary is
310 mm F/1.55):

http://www.canit.se/~dlwebb/catadioptric/310schmidt/schcorr.jpg

You will notice the deepest point in the corrector is only 80
microns less than the highest point (axis). Design uses 6 mm
glass, which is readily available where I am and design can
tolerate a little less thickness. I went for 600 grit assuming
this would get me my curve quickly without removing excessive
glass.

Is the other side of your corrector flat or are you splitting
the curve between the two sides?

Dominic-Luc Webb

_______________________________________________
ATM mailing list http://www.atmlist.net/