Hi Roy.

09-Oct-03 12:06:16, Roy J. Tellason wrote to Jasen Betts

 RJT> Yeah,  but not using 8mm film!

why not?  2400 dpi is 2400 dpi... it doesn't matter about th size of the
media.
on 8mm file that'd be about 800x600... or less since there's space lost
for the drive sprockets.

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

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

yeah, the same beam split and sent via two paths...

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

Getting an illusion of three dimensionality is neat, but the definition and
colour reproduction often aren't very good. and the need for the hologram
to be in the line of sight to see the 3d image preclude some more
interesting applications :)

what I was thingking was to use holography to record the data instead of
optically imaging the LCD, that's mean that on playback blemishes on
the film wouldn't be as significant to the sensor.

it'd probably need a pulse laser to do that though... too many moving parts
and thefore too much vibration to use a continuous beam.

 -=> Bye <=-

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