ATM: Continue Polishing or Back to Fine Grinding?

[Adam Rosenberg <adamr@synopsys.COM>]

All,

My 10" F/6 mirror seems to have a fair sized ledge on the outter zone which
has been confirmed by foucault and ronchi tests.  I see ~.85" of variation
from my 1st zone measurement to my 5th zone measurement.  Is this something
that can be tackled with continued polishing (I've been trying for a long
time now) or should I bite the bullet and drop back to fine grinding?
Progress seems slow or non-existant with polishing and my gut feeling is
that I'll save a ton of effort if I  invest a short time in fine grinding.

Thanks,

Adam R.
Adam E. Rosenberg                 Applications Consultant for IBM
adamr@synopsys.com                Synopsys, Inc.
(973) 335-8800 x218               Morris Corporate Center III
(973) 257-1117 fax                400 Interpace Parkway
120 Character text message:         Bldg. D
2017380570@mobile.att.net         Parsippany, NJ 07054

For customer support try Synopsys on the Web @ www.synopsys.com
or consider SOLVIT

Support Center       : (800) 245-8005 or mailto:support_center@synopsys.com
Logic Modeling/Eaglei: (800) 445-1888 or mailto:sw-support@synopsys.com
VCS                  : (800) 837-4564 or mailto:support@chronologic.com
VERA                 : (650) 584-5612 or mailto:vera-support@synopsys.com
Motive               : (800) 245-8005 or mailto:mtv-support@qdt.com
ATM/SONET/SDH Telecom Workbenches: [atm or sonet or sdh]@synopsys.com
==========================================================================