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Re: [OM] analog and digital

Subject: Re: [OM] analog and digital
From: George Sears <gwsears@xxxxxxxxxxx>
Date: Fri, 27 Sep 2002 21:47:18 -0400
Is that some arithmetic or what?

GeoW
:g


> >The number 12 is 1000 times the rms (root mean square) variation in
> >the
> measured density, >so what they are saying is that the average density
> is 1.000 and the standard deviation >around that is 0.012 in density
> units (the base ten logarithm of the transmittance), for a >48-micron
> aperture.
> 
> >So, translating into a language somewhat closer to English, the
> >average
> transmittance is >0.10 (that is, 10%), and 680f the density samples
> fall in the range 0.1028 to 0.0973 >(10.3% to 9.73%) transmittance.
> 


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