Jasen Betts wrote in a message to Roy J. Tellason:



 RJT>> I wonder what sort of resolution you could get with binary data
 RJT>> on fine-grained B&W film

 JB>> it'd be better than TV .... maybe 100 bits per milimetre-hmmm
 JB>> that's only 2540 dpi... maybe much more.

 RJT> You sound pretty optimistic here.  If you ever do get to playing
 RJT> with the idea I'd be interested in hearing how it turns out

 JB> theorecically.... when you said "you" I didn't take it personally
 JB> :) ISTR "imagesetter"s get 2400 dpi for photo-etching offset
 JB> printing plates.

Yeah,  but not using 8mm film!

 JB> fine-grained film can resolve points in the order of the wavelength
 JB> of visible light that's how holograms work.

 JB> as for how to record holographic images-I 'm not shure. but that'd
 JB> be the way to do it... it gives redundant coding - you'd not lose
 JB> data to a small scratch on the media.....

I seem to remember something about two beams,  one direct and one
reflected,  but it's been a long time...

Last time I was in this "museum of holography" (and not all that
impressed with it) was back in 1978!

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