Re: ATM ronchi mayday...

["'rjf@skyhackers.org'" <rjf@skyhackers.org>]

On Wed, Oct 11, 2000 at 01:08:25PM -0700, Randy Johnson wrote:
> <http://www.stellafane.com/atm/atm_foucault_tester/atm_tester_plans_2.htm#Ro
> nchiScreen> which is billed as 100 LPI screen when the scaling is such that
> you print a 2" square screen.  I've printed at the prescribed scaling and
> the count of black lines in a half inch width is 25 lines.  This is telling

Needless to say, I did indeed print my grating from the Stellaphane
site, and it appears to be wrong -- although stuff like this is
_highly_ dependent on how you print it. I used paintshop pro to print
mine, and it was still wrong :(

rjf&