Method and apparatus for distinguishing actual sparse events fro

Details Method and apparatus for distinguishing actual sparse events fro Method and apparatus for distinguishing actual sparse events fro

1998-06-05

2000-12-12

Lee, John R.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250216, H01J 4014

Patent

active

061602515

ABSTRACT:
Remote sensing method and apparatus wherein sparse optical events are distinguished from false events. "Ghost" images of actual optical phenomena are generated using an optical beam splitter and optics configured to direct split beams to a single sensor or segmented sensor. True optical signals are distinguished from false signals or noise based on whether the ghost image is presence or absent. The invention obviates the need for dual sensor systems to effect a false target detection capability, thus significantly reducing system complexity and cost.

REFERENCES:
patent: 5880838 (1999-03-01), Marx et al.
Eustace L. Dereniak, Devon G. Crowe, Optical Radiation Detectors, Introduction to Detector Physics and Nomenclature, John Wiley and Sons, pp. 36-59, 1984.
Douglas Isbell and William A. Steigerwald, Polar Spacecraft Images Support Theory of Interplanetary Snowballs Spraying Earth's Upper Atmosphere, ftp.hq.nasa.gov/pub/pao/pressrel/2997/97-112, May 1997.

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