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Opto-electronic voice transceiver
- this page is a stub
Lichtsprechgerät 80, abbreviated Li.Spr.80, was a free-space optical
communication device, manufactured from 1940 onwards by Carl Zeiss Jena 1
(Germany) for use by the German Armed Forces.
It uses visible and infrared (IR) light for voice communication
(telephony) over distances of up to 10 kilometres. A complete setup consists
of a tripod with a dual-lens optical system, and a separate amplifier/power
supply unit (PSU) that is connected to the optics via a 2 metre cable.
The device has two 80 mm lenses that focus the light in such a way, that
it projects a 1 metre spot at a distance of 1 km.
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During WWII, Carl Zeiss Jena was identified with the manufacturer code
'blc'.
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Device Optical communication device Purpose Covert voice communication Model Li.Spr. 80 Manufacturer Carl Zeiss Jena (blc) Country Germany Year 1940 User Wermacht (Germany, WWII) Modulation A1, A3 Output Headphones Source 4W glowlamp with prism and focussing optics Valves 5 × RV2P800 Power 2V, 1.5V, 50V, 60V Dimensions 430 × 320 × 170 mm
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© Crypto Museum. Created: Wednesday 20 September 2023. Last changed: Wednesday, 20 September 2023 - 16:49 CET.
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