USA As Represented by Secretary of the Navy

Gottfried R Rosendahl

Wiley V Dykes

Denis R Breglia

Windell N Mohon

Frank J Oharek

Robert J Entwistle

An optical system for 360.degree. image transfer in which spaced primary 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 image impairing aberrations, and in which 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 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. The refractive lens system, in turn, consists of four lens groups, the first lens group of which bends chief rays of image forming light approximately parallel to an optical axis and corrects for field curvature, the second lens group of which corrects for primary and secondary color, the third lens group of which bends the chief rays towards an image plane and provides additional field curvature and secondary color correction, and the fourth lens group of which provides additional secondary color correction and renders the chief rays incident upon the image plane at an angle of approximately 90.degree..

Lens system for panoramic imagery

A stabilized viewing system is disclosed as having a telescope for viewing n object by an observer when the object is remotely located from the observer, a camera for timely photographing a succession of pictures of the object on a film that is processed immediately prior to exposure of the object of the film by a processing fluid which causes a positive image to be produced on the film after exposure of the object on the film which may be viewed by the observer immediately thereafter, a unique movable linkage-type servomechanism connected between the telescope and the camera for enabling one or the other to be selected as desired by the observer, in order that he may either view the object directly or the filmed image thereof, and a magnifying eyepiece disposed in such manner with respect to the telescope and the film of the camera that either one or the other may be observed in magnified form.

Stabilized scene viewing system

An optical image generation and projection system is disclosed as including light relay type image generator for transforming an invisible electronic signal into a visible amplitude modulated image having interferential contrasts on an oil layer and a light source and lens system associated therewith in such manner as to project the optical image generated thereby onto a projection screen.

Television projector system

An optical system for 360.degree. image transfer in which spaced primary 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, and in which 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.

Optical system for 360.degree. annular image transfer

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. out of phase polarization, which targets are distinguishable by a polarizing filter and light receiver and hit indicator circuit provided on a weapon to be aimed at the target.

Growing community of inventors

Winter Park, FL, United States of America

Gottfried R Rosendahl