Re: New XY Monitors

Call me naive, but I was going to get the light source VERY near the galvos (no more than 1/4") and the galvos VERY close to each other (1/2" maximum). This would allow the
galvo surfaces to be very VERY small (can you say minimum inertia?) and wouldn't be conventional mirrors at all. By keeping inertia low and movements very small I was
hoping to use either piezo transducers or those mini-headphone speakers. Problem there is finding some with high enough reflectivity.

Scanning power would be quite low, simple amplifier with no heatsinks. Possibly (wishful thinking would be more like it) drivable from the game board without any amplifier
at all.

The lamp drivers would be scarier, but I had some interesting ideas for doing that.

At the present time, a low-cost LASER diode could probably handle the red. But the <$20 red LASER sounds good, the green beam would be over $300 and blue just isn't
available.

And there still is the problem with the screen having no persistence.

Now making a vector monitor in the form of a GOGGLE is a whole different story. Here LEDs would work. Entire goggle could be done for possibly under $100.

Robert Mudryk wrote:

> the galvo's in a old Laser player is known as a GAL-2 seen sold on ebay every once and awhile... best case... you could scan a single letter.. if it was large
> enough... a GAL-2 is rated at 300 points per second, or about 4-5 vectors per frame... nice for making pretty patterns in laser though :)
>
> peter jones wrote:
>
> > -----Original Message-----
> > From: Rodger Boots <rlboots@cedar-rapids.net>
> > To: vectorlist@synthcom.com
> > Date: Thu, 16 Nov 2000 14:54:42 -0600
> > Subject: Re: VECTOR: New XY Monitors
> >
> > > 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!!!
> > >
> > I was going to try and play asteroids once using a laser-diode from a pen running past 2 galvo's from an old phillips laser-player but never got around to building it.
> >
> > it was only to project a small 10-30 inch image but it was just an idea to test the galvo-speed.
> >
> > L8r.
> >
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