Mini version of Scophony - its do-able
Posted: Thu Feb 04, 2016 2:21 am
Of all the mechanical TV systems the one that intrigued me the most was the Scophony TV system. 400 lines and 24 inch screen, not bad for 1938, in fact not bad for now.
I was toying with the idea of making a small system based on the twin mirror drum system used in the Scophony, but limiting the screen size to say 6 x 8 cms with 60 lines. The purpose would not be to copy all the optics Etc of the original but use the main concept of 2 mirror drums to make a compact televisor.
A laser diode pointer could be used as the light source and avoid the lenses, as this would not need focusing if one accept a spot size of around 1mm this would give a 6 x 8 cm display for 60 lines.
First problem would be the high speed line scanner - desperately looking for a polygon mirror to do this, but nothing yet, they use these in laser printers and copiers, but most have the motor embedded on the PCB. The motor could be a hard disk motor, these run up to 15000 RPM and are synchronous, and I have many faulty hard discs.
Any info for any parts going cheap (laser diodes, polygon mirrors Etc) would be most welcome
I was toying with the idea of making a small system based on the twin mirror drum system used in the Scophony, but limiting the screen size to say 6 x 8 cms with 60 lines. The purpose would not be to copy all the optics Etc of the original but use the main concept of 2 mirror drums to make a compact televisor.
A laser diode pointer could be used as the light source and avoid the lenses, as this would not need focusing if one accept a spot size of around 1mm this would give a 6 x 8 cm display for 60 lines.
First problem would be the high speed line scanner - desperately looking for a polygon mirror to do this, but nothing yet, they use these in laser printers and copiers, but most have the motor embedded on the PCB. The motor could be a hard disk motor, these run up to 15000 RPM and are synchronous, and I have many faulty hard discs.
Any info for any parts going cheap (laser diodes, polygon mirrors Etc) would be most welcome