Subject: 3 lp/mm =.098mm ?
Date: 2006-11-09 20:34:54
From: Don Lopp

Hi John and Mike

An example- How can 3 lp/mm =.098mm, as Mike Davis has suggeted ?

Best regards,

DON

Subject: Re: 3 lp/mm =.098mm ?
Date: 2006-11-10 10:33:45
From: Michael K. Davis

Hi Don,

At 07:05 PM 11/9/2006, you wrote:

>An example- How can 3 lp/mm =.098mm, as Mike Davis has suggeted ?

You, too, have fallen victim to my failure to emphasize that the desired
resolution figures I used are the resolutions we hope to see after
magnification in the viewer.

The reciprocal of 3 lp/mm is 0.333mm, but if we divide that by 3.39 (the
magnification imposed by a 75mm viewer focused at Infinity), we get 0.098mm.

So, a desired resolution of 3 lp/mm, as seen in the viewer after
magnification, requires an on-film maximum permissible CoC diameter of 0.098mm.

Mike Davis