Re: New XY Monitors

you got the right concept here..

and yes... galvo's capable of keeping up with a CRT, is currently unatainable...

galvo's are the currently the "best bang for the buck" for both performance and
speed...
still they are mechanical.. and energy needed to change direction takes time and alot
of power (generating alot of heat)
a game like asteroids, running at 60 fps with the fastest know galvo's and a usable
scan angle is not possible but it's close...
I know, we've done it :) but we had to run it thru a emulator... because of
acceleration and anchor points (hold the DAC's at a end point to wait for the scanners
to catch up), removing vectors less than 3-4 points away... removing excessive
blank vectors... we were able to running at 30-35 FPS

will piezo work not a chance... they can't obtain a consistant repeatable position

with lamps work no... do much divergence... and you have to move a much larger mirror

If someone would design a DSP amplifier that reacted based on the position of the
galvo... and also removed excessive invisible lines.. there is a change we could plug
a laser projector into the monitor output of a vector game...

laser cost... single color highpower Laser Diodes a 30-50mw 650nm TTL or analog
modulated diode will work up to about a 4 to 5 foot screen... no problem... about
$350

Galvo's about $1000... amplifier probably at least another $1000-$1500 (Today's
amplifiers cost on average $500-750 per channel)

Later,

Rob

Rodger Boots wrote:

> I was thinking the "laser bouncing off of galvos" method, but the problems there
> are getting the costs down.
>
> So then I says to myself "self, how about using very small earphone elements or
> piezo transducers VERY close to the laser so they don't have to move much to get a
> LOT of deflection?", but the lasers are still too expensive.
>
> So then, though it's a messy approach, I wondered about using arc lamps for the
> three colors. Doing high speed modulation should be a nightmare, but let's just
> see where this thought goes. How much are those arc headlights they use on some
> cars?
>
> The whole downside to all of this, though, is the lack of persistence that CRT
> phosphors give you. On the "bright" side, though, explosions could light up the
> room!!!
>
> Zonn wrote:
>
> > On Sat, 11 Nov 2000 15:27:14 -0600, Rodger Boots <rlboots@cedar-rapids.net>
> > wrote:
> >
> > >It's simple! Get rid of the CRT!!
> >
> > Ok Rodger, I'll bite...
> >
> > What would you suggest in the place of the CRT? Laser projections? LCD
> > displays? Plasma Displays? One of those new flat screen TV displays that work
> > similar to Plasma Displays?
> >
> > -Zonn
> > >
> > >
> > >Phillip Eaton wrote:
> > >
> > >> I'm sure there is a way around it, but this is just what I was told by the
> > >> man from Hantarex. They have to have type approval for the volumes that they
> > >> make.
> > >>
> > >> > -----Original Message-----
> > >> > From: owner-vectorlist@synthcom.com
> > >> > [mailto:owner-vectorlist@synthcom.com]On Behalf Of solarfox@texas.net
> > >> > Sent: 11 November 2000 19:38
> > >> > To: vectorlist@synthcom.com
> > >> > Subject: Re: VECTOR: New XY Monitors
> > >> >
> > >> >
> > >> > On Sat, 11 Nov 2000 11:47:29 EST, you wrote:
> > >> >
> > >> > >> If I were to make some XY monitor get well kits that require
> > >> > mucking around
> > >> > >> with the tube and stuff, then I'm liable for any damage you cause to
> > >> > >> yourself. It doesn't matter what I get you to sign to say I'm
> > >> > not liable,
> > >> >
> > >> > >I don't think this is necessarilly true. I remember reading one
> > >> > court case
> > >> > >where some idiot tried to sue Sharp because they got juiced
> > >> > trying to adjust
> > >> > >a monitor with an uninsulated screwdriver. As long as the
> > >> > monitor has the
> > >> > >appropriate warnings (and as long as the manufacturer has a
> > >> > decent legal
> > >> > >dept.) they should be covered. The analogy the Sharp defense
> > >> > used was "This
> > >> > >case gets thrown out of court if the plaintiff got burned on a
> > >> > hot stove..."
> > >> >
> > >> >
> > >> > Indeed - there must be _some_ way around this; otherwise, magazines
> > >> > like Radio-Electronics wouldn't dare publish articles on building tesla
> > >> > coils, plasma-ball "lightning" displays, and the like...
> >
> > ---------------------------------------------------------------------------
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> > ** message body to vectorlist-request@synthcom.com. Please direct other
> > ** questions, comments, or problems to neil@synthcom.com.
>
> --
> Windows:
>
> 32 bit graphical interface for a
> 16 bit patch for an
> 8 bit operating system written for a
> 4 bit processor by a
> 2 bit company that can't stand
> 1 bit of competition.
>
> ---------------------------------------------------------------------------
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Received on Fri Nov 17 19:10:23 2000