Re: ATM sixteen inch: bubble trouble?

["Michael J. Coslo" <mjc5@psu.edu>]

>I have some type of small flaw in the mirror's figure and I think it's due
>to a small bubble (1/32 inch or smaller) that's very close to the mirror
>surface.  .just my luck!  Also, this flaw is not in the area where the
>secondary mirror would shadow it. . .darn!

        I have a small bubble of around the same size that made it to the
surface of my mirror. It is around half the diameter exposed. You learn to
live with it. I just look at it as my built in reference mark, since it
shows up big time on the test stand.

        It really isn't that much of a problem, once you get over the
dissappointment of having a flaw that you cant get rid if. I did have to
use a toothpick to remove  whatever grit or polish was caught in it while
rinsing the mirror.

        - Mike -