Television viewer
OwnerLuis W. Alvarezinventor
Life of this patent
Estimating the term…
Abstract
A viewing system for use with a cathode ray tube display comprising an objective lens which focuses the display image onto a limited light diverging screen having orthogonally arranged lenticular lenses on its opposite planar surfaces and which diverts the projected light to produce an image of maximum brightness in a hypothetical ellipse having a major dimension of six inches and minor dimension of two inches at a viewing distance of sixteen inches.
Claims12
A viewing system for use by a single viewer of a single electronic display comprising a projection lens having an aperture, a limited, light diverging screen viewed by the viewer, the screen having a Fresnel lens means incorporated therein with a front face and a rear face which optically faces the projection lens, wherein the projection lens projects the light image from the single electronic display onto the Fresnel lens means, the Fresnel lens means comprising a first set of parallel, straight lens Fresnel lens elements on the rear face and a second set of parallel, straight line Fresnel lens elements on the front face which are arranged orthogonal to the first elements, at least some of said first and second elements being contoured to act as a combined simple field lens for focusing an image of the projection lens aperture at an exit pupil located at a predetermined viewing distance from the screen while simultaneously spreading the image over an oval shaped area having predetermined minor and major axial dimensions and which is contained in a plane, parallel to the screen and located at the predetermined viewing distance from the screen, with substantially all of the light image passing through the projection lens hitting the exit pupil.
Dependencies are inferred from the claim text.