Abstract: A video display operating at standard commercial television broadcast sweep rates, line spacing and/or pixel density. An over and under split screen presentation of a stereoscopic pair of images permits three dimensional viewing by audiences of any size using simple optical deviation elements mounted in a pair of spectacles. Besides being compatible with broadcast standards, the display is compatible with the format already used in producing 3D motion picture films permitting unaltered broadcast of such films and/or direct transfer to video tape with existing equipment. The recorded video can then be viewed by said optical deviation elements. The final display, when viewed stereoscopically, exhibits an aspect ratio of more than twice the width to height which is about the same as motion picture screens and well suited for display of sporting events regularly broadcast on television.

Abstract: An apparatus and method for producing photographic records of transparencies comprising a standard television monitor including a cathode ray tube having a raster and operable to generate a flying spot of light on the raster at a standard television sweep rate. The apparatus includes and the method uses a standard camera and a support for supporting the transparency between the raster and camera. Light from the flying spot passes through the transparency and is monitored by a photoelectric detector in advance of light passing through the same transparency areas being viewed by the camera lens. The photoelectric detector is connected by an inverse electronic feedback to the input of the cathode ray tube to vary the intensity of the flying spot inversely to the intensity of the light sensed by the detector. This produces a negative luminous image on the raster. The camera lens views an image which is a composite of the transparency and raster images and which has a compressed brightness range.

Abstract: A scanning beam of light is arranged to illuminate a moving web of transparent material wherein the transmitted, undeviated beam falls upon a light absorber. A light collecting rod is located so that only a small amount of the undeviated beam is intercepted. When a transparent refracting flaw arrives in the beam, a portion of the light is deviated and illuminates the light collecting rod which contains a photocell at one end and thereby produces a positive electrical impulse designating the presence of a refracting flaw. When a light absorbing flaw arrives in the beam, illumination of the light collecting rod is reduced which produces a negative electrical impulse designating the presence of an opaque flaw. The difference in signal polarity thereby identifies the type of flaw detected.

Abstract: The present invention relates to the formation of a tomogram by means of apparatus which will expose a photosensitive surface edgewise by means of an X-ray source which passes through a subject with the subject and the film being rotated about parallel vertical axes transverse to the X-ray beam.

Abstract: An automatic focussing attachment for photographic enlargers for lengthening and shortening the length of the enlarger bellows to automatically focus the lens as the enlarger is raised and lowered to vary the size of the image. A pivoted link of variable effective length has one end connected to a point fixed with respect to the base of the enlarger and the opposite end portion connected to the focussing knob of the enlarger so that as the enlarger is raised and lowered on its support column the focussing knob will be rotated to maintain the focus of the lens. The variable effective length link has several forms including a plurality of pivoted leaves and a sliding telescoping mounting.

Abstract: An intra packet film processing method and apparatus which includes the injection of a monobath film processing solution into a film packet by means of a hypodermic needle so as to uniformly coat the emulsion surfaces of the film while remaining in a light-tight condition in the packet. Since the film in most instances has emulsion surfaces on both sides thereof hypodermic needles are inserted from opposite sides so as to uniformly coat both surfaces of the film. The film is supported so that its outer ends may flex away from the needle as the needle is caused to penetrate the covering surfaces of the film. The flexing of the film reduces the attack angle of the needle and allows the tip of the needle to slide along the film surfaces without penetrating the film. Either the needles or the film are rotated about an axis extending through the plane of the film so as to engage both needles with opposite surfaces of the film packet to uniformly penetrate the covering materials of the packet.