Early Electronic Television
Ardenne Flying Spot Scanner
Manfred von Ardenne, a German television engineer, began experimenting with CRT receivers in 1930. Using mechanical scanners, he produced good quality images using CRTs.
Here is an early image, from December, 1930 |
By April 1931, the picture quality was much improved |
In April of 1931 von Ardenne had made a flying spot film scanner. It produced a 60 line picture, using a horizontal scan rate of 1500 Hz. and a vertical scan rate of 25 Hz. An 8000 volt power supply was used on the CRT.
The scanner, with the CRT and raster visible |
A closeup of the film mechanism |
The neck of the CRT, showing the deflection plates |
A picture from the screen |
A block diagram. Notice that the scanner is connected directly to the
monitor CRT. The signal was not broadcast.
Here is a block diagram of a scanner with sync pulses added to the
video, for possible broadcast.