Abstract: A projector of the type which uses an optical modulator that modulates light by controlling the emitting direction of light applied to a light illumination surface in accordance with image information is provided with a reduction in size. In the projector a prism has a selective reflection/transmission surface which reflects illumination light emitted from an illumination optical system and impinging thereupon, and causes the illumination light to impinge upon the light illumination surface of an optical modulator at a predetermined angle. The prism allows the modulated light emitted from the optical modulator to be transmitted therethrough and emits the light to the projection optical system.

Abstract: The invention refers to a method of shortening the closure time of shutters in cinema projectors of the type in which film is intermittently advanced one frame at a time into registry with an image window in the projector, and wherein each time the film is advanced a shutter in the projector closes the image window during the time that the film is being advanced. According to the invention, an optical compensation of the film motion is effected by determining the rate at which each image of the film begins and ends, respectively, its advance into registry with the image window of the projector, generating a control signal proportionate to the rate, and positioning between the image window and the associated projection screen a movable plane-parallel plate which is adjsuted by the control signal to shorten the closure time of the image window during each film advance, thereby to increase the luminous efficiency factor of the projector.

Abstract: A gyroscopic, arcuate and multi-positional reflector and Cinematograph, or cinematographic reflector, is disclosed which in hand-held embodiments reflects an image or motion-like illustration or image along an arcuate viewing field by virtue of a repeating sequence where an acute angle and dihedral relationship of opposing reflective and viewable image surfaces provides a perceptible image at diverse sight lines and tiltable positionings of the invention. And in mechanized, stationary, multi-panel embodiments, utilizes the same repeating sequence and critical reflective angle between image and reflective surfacing to provide an event viewing area along one or more perceptible sight lines of a viewer or user.

Abstract: For the purpose of simultaneous presentation of an information on a display array (6) a display means has an image movement device (12,13), with the aid of which the image of the display array can be aimed in different directions, preferably along a circle. In addition, an optical bundling system (15) is provided which aims the image in one certain direction only, depending on the momentary position of the image movement device (12,13). Against the viewer a transparent screen (18;58) is provided.

Abstract: An apparatus is described for projecting a motion picture image on a screen that extends 360.degree. around the viewers, by moving a film past a slit through which light shines, forming an image of the slit on the screen, and rapidly revolving the slit image around the screen. The film moves rapidly enough to permit the projected slit image to rotate around the screen at a rate of at least about 50 rotations per second. The film, which moves continuously, can be free of sprocket holes and can be driven by a capstan drive, and the film can have a thickness less than half the thickness of present film stock so that a roll of film of moderate diameter can last several minutes.

Abstract: A photographing- or playback- device for a continuous photo picture carrier which is moved along a guide track by means of a drive device, particularly for motion picture film, with an optical imaging system and at least one mirrored surface which is movable about an axis, particularly a polygonal set of mirrors for the optical equalization of the image shifting as well as a light source if necessary. In the optical path between the guide track of the picture carrier and the mirror there is provided a partially-mirrored surface, which surface is inclined relative to the optical path and forms a part of an autocollimation system. By the partially-mirrored surface a part of the beam rays is deflectable, whereby the axis of the optical imaging system runs inclined or transverse relative to the beam axis (which beam axis runs between the guide track and the mirror) and runs to, or respectively from, the partially-mirrored surface, and the axis of the mirror also is arranged on the beam axis.

Abstract: A mirror mechanism for a continuous-motion cinematograph film projector. A drive shaft is mechanically coupled to the film transport and is coupled through a slipping clutch to drive a cam. A cam follower riding on the cam profile oscillates a compensating mirror. Frame synchronization of the mirror scan is effected by detection of optical synchronizing marks on the film. Release pulses are generated in response to the synchronizing marks to energize a solenoid to release a blocking member which otherwise blocks movement of the cam.

Abstract: A film strip is continuously advanced past a film gate of a camera or a projector while light coming from the strip through the film gate is reflected by a pivotable mirror keeping a beam of light trained upon a specific area of the strip, i.e., a frame, during a major part of a recurrent operating cycle. The mirror is reciprocated during each operating cycle under the control of an electrical signal generator synchronized with the strip-feeding mechanism, either directly or through markings (e.g., perforations) on the film strip, and performs a relatively slow forward sweep followed by a relatively fast return sweep, the latter being effected by a pulse of one polarity immediately followed by a pulse of opposite polarity arresting the mirror drive. In one embodiment (FIG.

Abstract: An apparatus for moving film through a projection or camera system utilizing continuous, uninterrupted motion of the film. Conventional sprocketed film is moved from reel to reel at a constant velocity. The image of the film frame passing over the film projection gate is projected upon an oscillating mirror mechanism which is driven synchronously with the motive force for the film strip. The oscillating mirror pivots at an angular velocity which stabilizes the image of the film frame, the mirror returning to its initial position during a small interval of the total time the film frame passes over the projection gate. A shutter periodically interrupts the light passing through the film frame to allow the mirror to return to its initial position where it becomes synchronized with the succeeding frame image.

Abstract: Image display from a continuously moving image carrier with the aid of a repeatedly advanced and reset optical compensator is improved by omitting the traditional compensator bias spring and resetting the compensator with electric power pulse doublets. A substantially constant driving torque may be provided for the compensator in proportion to a damping term of the compensator equation of motion. An electric bias may alternatively or additionally be provided for biasing the compensator during image display against the direction of advance motion. Decelerating power may selectively be applied to the compensator to prevent or correct overshooting in the advance direction.

Abstract: Image display from a continuously moving image carrier with the aid of a repeatedly advanced and reset optical compensator is improved by omitting the traditional compensator bias spring and resetting the compensator with electric power pulse doublets. A substantially constant driving torque may be provided for the compensator in proportion to a damping term of the compensator equation of motion. An electric bias may alternatively or additionally be provided for biasing the compensator during image display against the direction of advance motion. Decelerating power may selectively be applied to the compensator to prevent or correct overshooting in the advance direction.