Comments on: Television Image Enlarged By Revolving Spiral Mirror (Dec, 1936)

By: jayessell

jayessell — Mon, 19 Oct 2009 15:57:14 +0000

Mirror TV’s UK….
Check out the Alexandra Palace Television Society at YouTube.
Several retrospectivies on the Birth of Electronic Television.
Also at YouTube, several mechanical TVs actually running.
(Wheel big. Picture small.)

By: Mirror TV's uk

Mirror TV's uk — Mon, 19 Oct 2009 11:59:35 +0000

Mechanical tv’s are wicked – I am so tempted to recreate one of these now

By: jayessell

jayessell — Sat, 09 Jun 2007 17:27:24 +0000

I had a similar idea for projection TV using lasers.
In the same manner as the rotating mirror in a laserprinter, the beam would be swept across the screen by two perpendicular rotating mirrors.
Modern digital electronics should be able to sync the vertical and horizontal mirror motors.
Even better if a frame buffer would hold the image to be displayed and the projector read the part of the image the mirrors were pointing at.

Of course, this would demand uneconomically powerful Red (easy) Green (expensive) and Blue (not sure they exist) semiconductor laser diodes, and a system of dicromic mirrors to reassemble the three beams into one beam.
(The process used in 3 tube color cameras, only in reverse.)

Unweildy for video, I suspect it could be used for text, like that clock with the oscillating wand.

http://www.ptsco.net/Products/.....oductID=10

By: Kryten007

Kryten007 — Sat, 09 Jun 2007 02:32:10 +0000

Yes! Huzzah for mechanical TV!!!