Accession Number : ADD000697

Title :   An Optical System for 360 degree Annular Image Transfer.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Rosendahl,Gottfried R

Report Date : 08 Apr 1974

Pagination or Media Count : 15

Abstract : The patent application relates to the field of optics and more particularly to a wide angle image transfer system capable of transforming images up to 360 degrees wide in conjunction with the taking or projection of pictures. An optical system is described for 360 degrees image transfer in which spaced primary and secondary hyperbolically surfaced mirrors are combined with a refractive lens system and are held in spaced relation by a transparent envelope having inner and outer surfaces generated from the near focal point of the primary mirror to avoid ray pass through distortion. The mirrors are so spaced and concentrically arranged that the entrance pupil of the lens system coincides with the near focal point of the primary mirror, which is centrally apertured to form an aperture stop (diaphragm), and the near focal point of the secondary mirror approximates the apex of the primary mirror, the far focal points of the mirrors coinciding to form a confocal set of mirrors.

Descriptors :   *Display systems, *Mirrors, *Optical equipment, Patents, Projection, Reflectors, Camera lenses, Training devices, Wide angles

Subject Categories : Humanities and History
      Photography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE