Method of detecting sources of coherent radiation and a device utilising the method
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United States of America Patent
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Issued Date -
Jan 29, 2009
app pub date -
Dec 8, 2005
filing date -
Jan 11, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a method of detecting sources of coherent radiation, which is achieved by depicting, simultaneously or at times close to each other, that part of the environment which is of interest by a radiation sensor, on the one hand with a vortex mask in front of the sensor (FIG. 2) and, on the other, without such a vortex mask (FIG. 1), and by subtracting the sensor signal from the measurement with a vortex mask from the one without such a mask, and determining the presence of a source of coherent radiation if the differential signal exceeds a predetermined threshold value. The invention also comprises a device using the method.
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