THE USE OF HOLOGRAPHIC SUBTRACTION IN THE OPTICAL PROCESSNG OF RECONNAISSANCE DATA.
Abstract
A technique is designed to subtract an undesired portion of an image from a given optical scene. A wave reconstructed from a hologram is shifted in phase by pi radians relative to the wave originally stored; thus, if two nearly-identical images of an input plane, one derived from a hologram and the other a direct image, are superimposed upon each other at a viewing screen, the identical portions of the images are canceled, and the difference between the two is displayed. The method has been verified experimentally for both binary and continuous-tone transparencies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 23, 1969
- Accession Number
- AD0701327
Entities
People
- B. J. Thompson
- J. F. Bryant
- K. Bromley
- M. A. Monahan
Organizations
- Naval Information Warfare Systems Command