FIELD: optics.
SUBSTANCE: video device to transmit given direction from one horizon to another comprises one horizon unit with lens and photodetector, and unit with prism of BR-180 type installed on other horizon. At that, light sources are placed around lens so that their image reflected from prism is projected onto photodetector. At that, during rotation of prism turns images of light sources, which determines direction angle.
EFFECT: technical result consists in design simplification.
1 cl, 1 dwg
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