Re: ATM Seeing double...looks like the main mirror :/

[Chuck Broward <broward@afn.org>]

At 10:06 PM 8/12/01 +1200, you wrote:
>
>Thanks to everyone who replied with trouble shooting methods. I tested
>the secondary mirror with my expanded laser collimator beam and could
>see no interference fringes other than those normally present. Nor were
>there any bumps or ripples that I could see. 
>
>I then turned to the primary mirror which is soft silicone fixed into
>the mirror cell I made (3 points).  Rotating the entire cell and then
>recollimating resulted in the double image rotating also.....though 90
>degrees as you may have guessed.  


Hi,
Now rotate the mirror within the cell!  I would not discount the
probablility that the mirror-cell combination is the double image producer!
  Reason I say that is that we have a club scope that behaved much the same
way, and it appears that the mirror cell is stressing the
primary---producing enough astigmatism to almost look like a double image.

Good luck, don't give up yet!

Chuck in HOT north Florida, USA
Chuck Broward   Melrose, Florida
352-475-1014        352-392-1051