Quote:
Originally Posted by old_tv_nut
I have never seen an explanation of the Eidophor that clearly explained how moving images were not smeared. The beam wrote on the oil, charging it and deforming the surface, and there was a slow rotation past a smoothing bar, but how was each picture erased when the next was written? Why didn't the image persist and rotate slowly out of view with the rotating oil? Was there some mechanism that discharged the oil quickly (within a 60th of a second)?
|
It has a shutter mechanism just like a normal motion picture film projector. The shutter only lets light in briefly enough that the frame is properly registered. I think the description of "slowly rotating" is a bit confusing. Think along the lines of a zoetrope type device. Everything is moving, but because of the optical path design you don't actually see the inherent mechanical motion, only the viewed subject motion.