Accession Number:

AD0640262

Title:

RADAR HOLOGRAMS,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB CORONA CALIF

Report Date:

1966-09-30

Pagination or Media Count:

21.0

Abstract:

Optical experiments and mathematical analysis of radar patterns have shown that radar holograms which are not affected by vibration can be obtained by the following method 1 A scanning radar receiver--possibly airborne--or an array of such receivers is used to produce a map that shows the intensities of radar signals 2 a pattern of concentric black and white bands is developed--possibly by a computer--in which the width of each band is proportional to the cube root of its respective radar signal intensity 3 the photographically reduced pattern is made into a transparency which is the hologram and 4 the hologram is illuminated by coherent light to provide images of the objects that caused the original radar signal distribution. This method produces holograms which are superior to Fresnel holograms, in that vibration is not a factor and, because exact gray scales are not required, to Fraunhofer holograms. Author

Subject Categories:

  • Lasers and Masers
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE