Accession Number:

ADD019681

Title:

Lidar Detection Using Shadow Enhancement

Descriptive Note:

Patent, Filed 18 Mar 1998, patented 23 Nov 1999

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1999-11-23

Pagination or Media Count:

4.0

Abstract:

A method is presented for detecting a body at sea. A lidar system provided onboard an aircraft transmits radiation at a wavelength in the bluegreen region of the energy spectrum towards the surface of the sea. The lidar system is tuned to receive return reflections occurring over a specified wave-length range. A shaped area located near the body is designed to inhibit any return reflections that would be detectable by the lidar system. The shaped area defines a shape that is abnormal for the area of the sea being searched and defines a size that is larger than the body. The presence of the body is indicated by a null return corresponding to the shape and size of the shaped area.

Subject Categories:

  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE