Message transmission system
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United States of America Patent
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-
Aug 25, 1992
Grant Date -
N/A
app pub date -
Nov 30, 1990
filing date -
Dec 1, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A message transmission system is operative for transmitting, over a short range, information emitted by at least one transmitter to one or more receivers, the transmitter being situated in a semi-hemispherical field above the receivers. Each receiver has optics for focusing the semi-hemispherical field on multiple detector elements of an array placed in the focal plane of the optics. The elements are responsive to the transmitted signal.
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