Re:Making a DIY text laser projector
by ansible on Thursday February 07, 2019 @05:09PM
(#19109098)
There's issues with doing this with a laser.
The vector display used on Asteroids actually steered the beam to form each individual line, and could do it fast enough to draw all the objects on the screen at a decent refresh rate. Steering the electron beam is fast because that is all electronic.
If you wanted to do a laser vector display, that's difficult because you'd be physically moving something (the laser or the mirror). Doing that fast is super difficult.
You could create a laser raster display (as in the linked blog post), but that won't look or work the same as a vector display.
The vector display used on Asteroids actually steered the beam to form each individual line, and could do it fast enough to draw all the objects on the screen at a decent refresh rate. Steering the electron beam is fast because that is all electronic.
If you wanted to do a laser vector display, that's difficult because you'd be physically moving something (the laser or the mirror). Doing that fast is super difficult.
You could create a laser raster display (as in the linked blog post), but that won't look or work the same as a vector display.