Stereoscopic viewing equipment

Claim 1

A stereoscopic viewing instrument comprising a movable screen on to which are projected the imAges of a stereoscopic pair of photographs and picture restituting means positioned between the photographs and an observer providing stereoscopic vision to the observer of the images thrown on said screen, which screen is movable, parallel and perpendicular to a fixed plane, to permit observation, study and photography of the different parts of the subject to which the stereoscopic pair relates, imagetransmitting means being interposed between the fields of view of the respective eyes of the observer and the movable screen and being capable of transmitting the images thrown on said screen to the observer when the latter occupies a position independent of that of said screen, said image-transmitting means being a flexible light-wave guide formed by a bundle of transparent fibers of which one end is fast with the movable screen and receives on its terminal section the images thrown on said screen and of which the other end has its terminal section viewed by the observer, said picture restituting means including a device for alternately occluding the projections of the two photographs of the stereoscopic pair and also including a device which comprises: an enclosure into which is inserted that end of the light-wave guide to which the images are transmitted, a disc rotated in synchronism with said alternate occlusions and embodying two equal respectively transparent and reflecting sectors, said disc being so disposed in said enclosure as to alternately deflect or transmit the light beam from said lightwave guide, and two systems formed respectively of a mirror and an eye-piece which are capable of directing the deflected or transmitted beams into the observer''s respective fields of view.