Re[2]: digitising arm

Thanks Jon,

Yeah, that's the one! I hadn't kept up with them. Good stuff then,
probably BETTER now (back then, I thought a 512 x 512 plasma display was
high resolution!). Although I did kinda like the sparks! No arms,
probably still have to stay out of the acoustical "shadows". Still I'd
like to see one!

Alan


Jon Elson wrote:

>
> Alan Marconett KM6VV wrote:
>
> > Terry, Ballendo, list,
> >
> > About twenty+ years ago, we had "sonic digitizers" (2D) for use in
> > Radiation Therapy Treatment planning. PHD's would trace tumors an
> > patient outlines into a compute to compute the treatment plans. It was
> > made by SAC, Scientific American C.. ???, anyway, they also made 3D
> > versions, and used a stylus which created a spark that could be heard by
> > the "linear microphones" along each axis. Not an arm, but might be an
> > interesting approach.
>
> That's Scientific Accessories Corp., still in business as of 1-2 years ago.
> They now DO have a 3-D version of this, without the nasty sparks, too.
> I think they have something with different technology with an arm and
> a stylus. It probably has better accuracy and resolution than the ultrasonic
> devices.
>
> Jon
>