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Opto Voice ZEISS Stasi
Opto-electronic voice transceiver
- this page is a stub
Oder was the name of a never-released optical light-based communication
device (German: Lichtsprechgerät), developed by Carl Zeiss in Jena (DDR)
for the repressive East-German intelligence service MfS (Stasi).
It was intended as the successor to the
JO-4.02 (Große Dahme), and had a larger
primary mirror, as a result of which the operational range would be longer.
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The image on the right shows the primary mirror of the device, which has a
diameter of 195 mm. It is clearly a prototype, as the surface does not yet
have its infrared coating. It has a fairly shorty
focal length of 340 mm and an opening ratio of 1:1.7. It is likely that
a secondary convex mirror was used to extend the focal length.
Many thanks to Karsten Hansky [1] for allowing us to photograph the
prototype primary mirror of the 'Oder' device.
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- Karsten Hansky, Primary mirror for Lichtsprechgerät 'Oder'
Personal correspondence, September 2023.
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© Crypto Museum. Created: Wednesday 20 September 2023. Last changed: Thursday, 21 September 2023 - 16:34 CET.
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