Re: [ATM] Polishing questions - stop polishing, keep polishing, or go back to fine grinding?

["tony gondola" <acgna@comcast.net>]

The only thing I can think of is that a large pit population will cause a 
general reduction in contrast. Not by changing the diffraction pattern but 
simply by scattering light throughout the field. The thing is, you'd have to 
have a truly vast number of them before you could scatter enough light to be 
generally noticeable. A single 0.1mm pit for every square mm of the surface 
is still only 1% of the total surface area. The actual reduction in contrast 
would be less.

Tony




----- Original Message ----- 
From: "Vladimir Galogaza" <vladimir.galogaza@zg.htnet.hr>
To: "ATM List" <atm@atmlist.net>
Sent: Tuesday, May 16, 2006 4:23 AM
Subject: Re: [ATM] Polishing questions - stop polishing, keep polishing,or 
go back to fine grinding?


> Ultimate test for figuring is star test (beside interferometry perhaps).
> Is there something equivalent for testing quality of polish.
> How will insufficiently polished surface affect image in scope.
> I mean not obviously bad polish but polish that looks good to some
> and not so good to others like the case addressed by  this thread.
>
> Regards
> Vladimir.
>
>
>
>
> -- 
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.1.392 / Virus Database: 268.5.6/340 - Release Date: 15.5.2006
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/ 

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