[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [ATM] Foucault Test Analysis Question

Hello,

if you didnt' use very small laps for figuring, or didn't apply the same
parabolizing stroke (same overhang) all the time, there is no much chance to
introduce serious narrow zones into a 6" mirror. So the measurements at the 4
zones should be a very good approximation of the real overall figure.

If you want to test it to death, you could make a second mask, with offset
zone positions in respect to the first one and could compare the results.


Stathis Kafalis
www.stathis-firstlight.de
Mirror Making Material in Europe:
http://www.stathis-firstlight.de/spiegelschleifen/materialeng.htm

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