Abstract: In a 3D motion picture projection system using polarized light, a light source and a reflector for imaging a convergent beam of light onto a film gate, a film with right and left stereo images at the gate, and means for projecting, polarizing and overlapping said stereo images onto a metallized screen; the improvement comprising an optical device for pre-polarizing the convergent light beam, a double refracting crystal located to transmit the convergent light beam, whereby two adjacent orthogonally polarized images, respectively vertical and horizontal, are placed onto the said right and left stereo images at the film gate with substantially no light loss; and polarized viewers having orthogonally polarized filters with their polarizing axes respectively vertical and horizontal, worn by the observer to separate the 3D images, whereby the light efficiency of the system is doubled.

Abstract: A stereoscopic optical system for use in a camera to simultaneously photograph two separated views of a three-dimensional scene with lenticular type film and a viewing system by which the stereo pairs recorded on the lenticular film can be projected and combined on a screen so that they can be seen in proper stereo relief with spectacles having orthogonally polarized lenses. The stereoscopic optical system comprises a dual optical path for providing the two separated views of the scene. The two separated views of the scene are optically encoded through the use of orthogonal polarizers and are then combined to travel along a single system optical path through the use of a polarizing beamsplitter. An objective taking lens images the combined encoded scene views through an apertured polarizing mask which spatially separates the two separate views so that each travels along separate paths to the film.

Abstract: A stereoscopic lens system for simultaneously recording left and right images on longitudinally displaced half-frames of a motion picture film. Left and right images are formed by a pair of adjustable receiving lenses horizontally spaced by the average human interocular distance and vertically spaced by an amount corresponding to the half-frame displacement. Images formed by the receiving lenses are focused onto respective field lenses. These images are in turn directed by front-silvered flat mirrors to the optical elements of a relay lens mounted to the optics body containing the above-described elements. Provision is made for the mounting of accessory receiving lenses and convergence altering optical elements located in front of the receiving lenses.

Abstract: Paired movie cameras, each having synchronized movements and in phase shutters, are provided with focus and zoom optics of identical, but conventional and commercial manufacture. The paired lenses are first rotated relative to one another to obtain a coincidence between the centration vector for each lens for either zoom or focus. Once the centration vectors are aligned identically on a polar basis, mounting to the camera with provision for synchronous zoom between the respective cameras thereafter occurs. Typically, and before each stereo shooting, the zoom optics are set to a maximum magnification and registered to the appropriate distance with the lens finders and reticules. Upon change of the focus and/or zoom setting, a variable prism affixed to one camera is moved relative to the remaining camera to maintain identical centration between the respective lens cameras.

Abstract: A light weight, compact, stereoscopic apparatus in the form of a lens assembly that can be removably attached to a conventional still motion picture or television camera as an integral unit in place of the normal lens so that a camera may be conveniently converted to three dimensional photography. The lens assembly when used results in superimposed stereoscopic records in color, which superimposed records are of the same size, and when viewed through suitably selected filters are in full relief and color, but when viewed without filters appear as a conventional two-dimensional view.

Abstract: A stereoscopic camera has two lens-and-mirror trains for imposing a pair of stereoscopic images in side-by-side relationship on a common photographic film. Each optical train comprises a pair of oblique mirrors and plural lens elements. However, the final or objective lens of one train is at a right angle to that of the other train, one objective lens having its axis parallel to the lines of sight and the other objective lens having its axis perpendicular thereto, this latter lens preceding its final oblique mirror and the former lens following the final oblique mirror, in their respective optical trains. In this way, the depth of the camera, parallel to the lines of sight, is substantially reduced and the sizes of the mirrors are substantially reduced. Stopping diaphragms are provided for each optical train, at right angle to each other, and mounted on a common block that is movable past the optical axes to permit the selection of the diaphragms of different sizes.

Abstract: Dual projection lens systems are housed together to project adjacent stereo images onto a screen in stereoscopic position relationship. An ultra-violet filter is positioned on the optical axis of each lens system, and toward the screen a separate polarizer is positioned on each axis to provide polarized images to be seen by the viewer through binocular-polarized eyepieces. Heat sinks are attached to the filters for removing heat.

Abstract: Stereo pairs which have been printed on a single film strip are directed and focused upon a screen by an attachment for a standard motion picture projector. The images are overlapped and polarized at right angles to the other upon the screen by an optical device having abutting elements. The stereo pairs on the film are separated by an opaque band to define the edges of the projected image and mask element abutment. Indicia marks may be provided on the film to enable the positioning of the right and left images on the film in the gate to avoid pseudo stereo projection. A film format for stereo pairs uses a dark bar centered at the aperture on the film or gate.

Abstract: This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and second light ray bundles from two positions separated by an interocular distance onto a single frame of a single film strip; a first exterior means for distinguishing from each other the first and second light ray bundles; a single frame aperture; a second means near the image plane to separate the first and second light ray bundles from each position respectively into right and left adjacent images onto the single frame; means to control convergence, focus and interocular distance; and a reflex viewer containing a third distinguishing means near the image plane to enable the simultaneous viewing and photographing of right and left adjacent images; and optionally an indicium marking means for said film strip at the side of the frame line.

Abstract: Stereo pairs suitable for motion picture projection are derived from conventionally taken motion picture film by selection of frames and rearrangement thereof in side by side relationship upon a continuous strip of motion picture film. The pairs so prepared may be incorporated into film containing conventionally photographed stereo frames to provide a compatible system for 3-dimensional motion picture projection.

Abstract: Photographic apparatus employing a single color filter for use in conjunction with a camera to produce a decodable composite image of a scene, which image has a three dimensional quality when decoded. The composite image is formed of two images, each image representing the scene from a different line of sight.

Abstract: This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and second light ray bundles from two positions separated by an interocular distance onto a single frame of a single film strip; a first set of mutually extinguishing filters such as polarizers, one filter of the set along each of the first and second light ray bundles; a single frame aperture; a second set of mutually extinguishing filters near the image plane to separate the first and second light ray bundles from each position respectively into right and left adjacent images onto the single frame; means to control convergence, focus and interocular distance; and a reflex viewer containing a third set of mutually extingusihing filters to enable the simultaneous viewing and photographing of right and left adjacent images. SUThis invention relates to a reflex camera device for 3-dimensional photography.

Abstract: A photographic method and system for achieving three dimensional projection in which separately recorded right and left eye images are projected toward a viewing surface in a superposing relation. Intermediately disposing shutter means cause the right and left eye images to be cast on the viewing surface in a timed space relation, in differential increments, and with relatively high frequency interruption.