With Manned Vehicle Patents (Class 352/132)
  • Patent number: 3958871
    Abstract: A method of making and utilizing a composite three layer specially polari motion target film for gunnery practice in which two vectograph films of 90.degree. variance in polarization and a black and white film comprise the composite film and are prepared by image transfer from a normal color movie film of a real world scene including background and target areas made with the target areas painted a color uncommon to the colors in the background. The method includes filtering out background and target areas respectively in image transfer to the respective vectograph films and in utilizing a filter rendering an appropriate gray value to the uncommon color target areas in the image transfer to the black and white film to cause the uncommon color targets to blend in with the background properly in the image obtained from the composite film. The result obtained is a complete motion picture film plus target areas, visible and invisible, of 90.degree.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: May 25, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gottfried R. Rosendahl, Windell N. Mohon