[rescue] Vector Plotters

Dave McGuire mcguire at neurotica.com
Mon Oct 5 14:37:54 CDT 2015

On 10/05/2015 12:56 PM, Justin Haynes wrote:
> 2. In raster displays, lines look smooth, but I'd guess the line is still
> being created with many discrete movements, and they blend together for a
> similar reason as the pen on a plotter does - the electron beam cannot
> change directly quickly enough to make such tiny jagged edges.  Do raster
> displays exist which can accomplish an actual straight line?

  [you meant vector displays, as indicated in your subsequent email]

  This is because the ones you're thinking of were driven by digital
systems via a D/A converter.  So, discrete steps.  Moving the electron
beam isn't the limitation...electrons have very little mass; it's
trivial to move an electron beam VERY VERY QUICKLY.  Look at super-fast
analog oscilloscopes like the Tektronix 7104.


Dave McGuire, AK4HZ
New Kensington, PA

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