Accession Number:

AD0331366

Title:

IMPROVED BACKGROUND DISCRIMINATION

Descriptive Note:

Corporate Author:

MITHRAS CAMBRIDGE MA

Report Date:

1962-06-01

Pagination or Media Count:

1.0

Abstract:

Research is concerned with infrared systems of extreme sensitivity by the development of a new and novel technique for effective discrimination between a target and its background. Unlike conventional systems which depend on some properties of an ever-changing background for effective space filtering, the new infrared system concentrates on the finite properties of a target. A system was constructed which utilizes the point target properties of a invariance under magnification and b invariance under rotation to reject the variations in system output signal which are introduced solely by the background. A model of this discrimination system was tested in the spectral region of 2 to 3 microns. System focal length is 100 mm with an effective f-number of approximately 1.5. The use of variable magnification and variable rotation resulted in improvements in system SN of at least one order of magnitude. Author

Subject Categories:

  • Infrared Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE