Device for receiving electromagnetic signals with an energy correction means
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Jan 31, 1996
filing date -
Feb 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A receiver device is intended to detect a beam of electromagnetic entry signals of a known geometry, arriving at a variable entry angle of incidence. It comprises an optical lens, comprising at least one aspherical surface capable of correcting the geometry of an incident beam according to a correction formula chosen in accordance with the entry angle of incidence, for transforming it into an incident beam and applying it to a quadratic detector. This tends to suppress the divergences of the energy received by the detector cording to the angle of incidence, and makes it possible to render substantially constant the signal-to-noise ratio of the detection and the detected signal, irrespective of the entry angle of incidence of the incident entry beam.
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