Accession Number : ADD003351

Title :   A Point-Source Slide Projection System Having a Large Zoom Ratio.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Pietsch,Roy

Report Date : 16 Aug 1976

Pagination or Media Count : 11

Abstract : The patent application discloses a variable magnification ('zoom') slide projection system that provides useful optical zoom ratios of the order of 100:1 and greater. The optical system uses a coherent point-source, a moving slide (i.e., a data input transparency), Fourier transforming and inverse Fourier transforming optical elements, phase-error correcting optical elements, and output image plane/viewing screen.

Descriptors :   *Optical images, *Magnifiers, *Optical equipment, *Patent applications, Display systems, Lenses, Reflectors, Image processing, Fourier transformation

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE