This information is ©
The Hunterian Museum and Art Gallery, University of Glasgow 2017
Televisor Scanning Disc
DES BAIRD,John,Logie circa 1925 Hastings, East Sussex, England DES after NIPKOW,Paul,Julius,Gottlieb,Doctor. 1884 Germany. MANU BAIRD,John,Logie circa 1925 Hastings, East Sussex,
330mm dia x 1mm
Radial incised markings
The Baird television system was electromechanical in nature. To transmit an image, a light source was focussed onto the scanning disc (interrupter) which was driven by a motor. The light passing through the disc illuminated the object in numerous vertical strips, every tenth of a second. This light was reflected from the object to a photo-electric cell. The output from the cell was then transmitted to the receiver, which was coupled to a neon glow lamp, the light from which was passed through a condensing lens and then another disc. It was then directed to a screen where the image was constructed. This disc has a row of thirty six radial slots cut in its circumference. This example is not a Nipkow disc .
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