Accession Number : ADA327583

Title :   Quarterly Report, Passive Ranging with Incoherent Systems.

Descriptive Note : Quarterly rept.,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Cathey, W. T. ; Dowski, Edward R., Jr. ; FitzGerrell, Alan

PDF Url : ADA327583

Report Date : 10 NOV 1995

Pagination or Media Count : 5

Abstract : Recent research has concentrated on two main issues. The first concerns high-accuracy passive ranging with a moving unaltered single-aperture system. Such passive ranging systems could be used as passive low-level altimeters. The second point concerns use combined optical and digital systems for aberration control. We have earlier demonstrated use of optical/digital systems for insensitivity to misfocus, or second-order aberrations. We show that this same technique can also be used to compensate for chromatic aberration, astigmatism, thermal effects, and spherical aberration. An important reason for controlling aberrations through combination of optics and digital processing is the possibility of making low precision (i.e. low cost) optical systems that perform as high-precision (i.e. high cost) systems.

Descriptors :   *OPTICAL EQUIPMENT, *RANGE FINDING, PASSIVE SYSTEMS, OPTICAL IMAGES, OPTICAL PROCESSING, WAVEFRONTS, DIGITAL FILTERS.

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE