Quote:
Originally Posted by mental4astro
Surface specs 1/8 wave or better.
Cheers
Alex.
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Hi again Alex ,
That 1/8 surface spec could be interpreted as 1/4 wavefront giving a Strehl ratio of .82 or the Rayleigh limit , not a top mirror .
Now is saying that I might be getting it wrong' but Id'e be be looking for a .92 or above Sterhl ratio mirror .
Have heard a perfect 1.0 Strehl mirror is not possible .
Regards
Bobby.