Abstract: A camera having a lens shutter mechanism in accordance with the present invention comprises sectors lying in a lens frame and forming a predetermined exposure aperture, a drive ring for opening and closing the sectors, a high-speed sector opening lever and a low-speed sector opening lever which drive the drive ring through an interlock lever, a plurality of springs having different strengths and constraining the high-speed sector opening lever and low-speed sector opening lever, a sector closing lever for driving the high-speed sector opening lever and low-speed sector opening lever in a direction causing the sectors to close, a mode changing member for changing shutter speeds by selecting whether both or either of the high-speed sector opening lever and low-speed sector opening lever should be driven, a charge cam gear for resetting the shutter mechanism to an initial position after exposure is completed, and a groove bored along the optical axis in a camera body and designed to guide the drive ring along th

Abstract: A reader-printer typified by discharging a print sheet from a printer unit towards the front surface of the apparatus. The central line of a projection lens is positioned on one side of the apparatus as viewed from the front surface of the apparatus with respect to the central line of a projection screen of a reader unit. The central line of a print discharging section in the print sheet discharging/conveying direction is positioned on the other side thereof.

Abstract: A photographic film cassette has a bar code disc rotating with the spool. The bar code disc has a bar code formed by black and white bars. The bar code represents the film sensitivity and the number of photographed frames. Each bar includes a wide bar and a narrow bar representing binary information. A bar code sensor detects each bar and generates a photoelectrical signal. The width of each photoelectrical signal is measured to determine a pass time required for the bar to pass the bar code sensor. The bar width is judged from this pass time. In order to avoid an erroneous judgement to be caused by a change in the rotation speed of the bar code disc, the pass time of an old bar last read of the same type as or a different type from the type of a new bar presently read is used. In a preferred embodiment, in accordance with the pass time and width of the bar one bar before the new bar, a reference pass time corresponding to the pass time of the narrow bar is obtained.

Abstract: A camera comprises: a photographing lens; a viewfinder lens lying behind the photographing lens so that an object to be photographed can be viewed; a first reflector mirror capable of being displaced between a first position, at which the first reflector mirror intervenes between the photographing lens and viewfinder lens so that light emanating from the photographing lens is reflected horizontally substantially at 90.degree., and a second position at which the first reflector mirror has retracted from between the photographing lens and viewfinder lens; a second reflector mirror lying by the side of the first reflector mirror so that the light emanated from the photographing lens and reflected from the first reflector mirror is reflected vertically substantially at 90.degree.

Abstract: A focal plane shutter device is provided in which when a rear shutter diaphragm travels in a first direction to retract from a photographing image plane from a state where the rear shutter diaphragm and a front shutter diaphragm shade the photographing image plane doubly, a balancer (42 and 44) travels in a direction which is substantially opposite to the first direction. When the front shutter diaphragm travels in a second direction opposite to the aforesaid first direction to begin exposure subsequent to the retraction of the rear shutter diaphragm, the aforesaid balancer (42 and 44) travels in a direction substantially opposite to the second direction. Consequently, it is possible to prevent camera blurring due to the traveling of the rear shutter diaphragm and the front shutter diaphragm by one balancer means.

Abstract: An adapter attachable to an image recording apparatus and operable for removably receiving therein a film cassette assembly including a film unit to be exposed by the image recording apparatus. The adapter includes a protective shield which normally protects an aperture of the image recording apparatus and which advances to an unblocking condition upon insertion of the film cassette assembly so as to allow exposure of a film unit in the cassette by the image recording apparatus. Upon removal of the film cassette assembly, the protective shield advances to its blocking condition, whereby the image recording apparatus is protected. The adapter also includes a mechanism for actuating the cassette assembly during insertion for allowing exposure of a film unit when the shield is in the unblocking condition, and for terminating exposure upon removal of the film cassette. In one embodiment, there is provided a releasable locking device for releasably locking the transport assembly in the adapter.

Abstract: An indicating apparatus within a finder of a single lens reflex camera includes a mirror which reflects light of an object transmitted through a photographing lens to form an object image on a focusing plate, and a finder optical system through which an image of the object formed on the focusing plate is viewed. The indicating apparatus further includes a mirror box which supports the mirror, and a photographing information projector provided on the lower portion of the mirror box to project and indicate an image of the photographing information onto the focusing plate without interfering with the front end of the mirror.

Abstract: Two barrier blades, a barrier interlocking plate and a barrier driver plate are arranged on a base to overlap one another. A first spring is arranged between the barrier interlocking plate and the barrier driver plate. By over-charging the first spring, the barrier blades are tightly closed. A second spring is provided between the barrier driver plate and the base to push both of the two barrier blades through the barrier interlocking plate 2. A through hole and a cutout are formed in the barrier driver plate at positions which do not interfere with the opening and closing loci of the barrier blades. The first and second springs are arranged in the through hole and the cutout, respectively.

Abstract: A camera includes a laser diode for emitting visible laser light towards a human subject whose image is to be recorded. The laser light is divided into a plurality of discrete, aiming beams of radiation by a pair of holographic and/or diffractive elements. The discrete beams are separated by a distance of at least about 7 mm. The laser light identifies where the camera is being aimed without damaging the retina of the human subject.

Abstract: A stereoscopic film projection system including one or more electro-optical light modulators used as part of, or in conjunction with, stereoscopic projection optics for the above-and-below film format employed for 35 mm theatrical cinema. The optical state of each modulator is voltage dependent, and the driving voltage therefor is generated in response to signals from a sensor positioned in the projector aperture. The sensor detects the presence or absence of index marks on the film. This arrangement insures that each subframe is maintained in a proper relationship with the optics' polarizers for preventing the projection of pseudostereoscopic motion pictures.

Abstract: A camera with a variable focus lens device, in which a lens position detecting device detects the focal length of the photographing lens from the amount of movement of a movable member that is capable of being rectilinearly advanced and retracted along the optical axis of the photographing lens, in order to provide an autofocusing function to accurately focus upon an object. Thus, the focal length can be detected in a simplified manner, and the influence of errors during assembly of the components of a photographing lens driving system can be minimized. A flare preventing mask effectively prevents flare occurrence in correspondence to variations in the position of the photographing lens. The lens retaining structure simplifies the assembly of the front lens group into a movable lens mount, and reduces the size and weight of the camera.

Abstract: A zoom lens system with a vibration reducing function comprises, in the following order from the object side, a first lens group with a positive refractive power, a second lens group with a negative refractive power, a third lens group with a positive refractive power, and a fourth lens group with a positive refractive power. The fourth lens group has a front group with a positive refractive power and a rear group with a positive refractive power. When changing a focal length of the zoom lens system from a wide-angle end to a telephoto end, the distance between the first lens group and the second lens group is increased, and the distance between the second lens group and the third lens group and the distance between the third lens group and the fourth lens group are changed nonlinearly. The front group of the fourth lens group is shiftable in a direction traversing the optical axis of the zoom lens system.

Abstract: A consecutive taking camera is adapted to taking eight exposures time-sequentially in a single frame on photo film. Four shutter disks are provided with a shutter slit and rotated from an initial position upon a single releasing operation. Each shutter slit is moved past two stationary openings. A shutter-driving slide plate with a spring is moved in a releasing direction upon the releasing operation, and rotates the shutter disks. A governor mechanism is disposed in fashion couplable with the slide plate, and reduces speed of rotation of the shutter disks. The governor mechanism is coupled with, and uncoupled from, the slide plate by an intermittent toothed wheel. The intermittent toothed wheel sets the coupled state when the shutter slit is away from the stationary openings.

Abstract: An Albada finder has a negative objective lens and a positive eyepiece lens. A frame is formed inside the area of the object-side surface of the positive eyepiece lens and a partial reflection area is formed on the eyepiece-side surface of the negative objective lens. The partial reflection area reflects an image of the frame. The frame is formed to enclose a small area of the object-side surface of the eyepiece lens while the partial reflection area is formed to enclose a small area of the eyepiece-side surface of the objective lens. Substantially all of the remaining area of the eyepiece-side surface of the negative objective lens not enclosed by the partial reflection area fully transmits all light incident on the surface.

Abstract: A zoom lens having a plurality of movable lens groups, and an apparatus which is used to adjust the position of the rearmost lens group of the plurality of movable lens groups in the optical axis direction upon assembly of the zoom lens, so that a focal point of the zoom lens does not deviate upon zooming.

Abstract: Disclosed is a projection exposure apparatus by a scan-exposure method. The apparatus includes an illuminating means for illuminating a mask transfer region with illumination light for an exposure through an aperture of a variable field stop disposed in a position substantially conjugate to the mask; a driving means for configuring the aperture of the variable field stop in a rectangular shape (having edges orthogonal to a direction of the scan-exposure) and simultaneously making variable a width of the rectangular aperture of the stop in a widthwise direction (the scan-exposure direction) of the transfer region (pattern forming region) on the mask; and a control means for controlling the driving means to change a width of the rectangular aperture of the variable field stop in interlock with variations in position of the variable field stop on the mask transfer region which varies due to the one-dimensional movements of the mask stage.

Abstract: A single-use camera comprises a film cartridge including a cartridge shell and a film spool rotatably supported inside the shell with a cylindrical drive hub end axially protruding from the shell, and a manually rotatable film advance thumbwheel with an axially depending drive spindle engaging the drive hub end to rotate the spool. The cylindrical drive hub end has a pair of adjoining semi-cylindrical wall portions, one of which protrudes farther from the shell than the other. The drive spindle has a single semi-cylindrical wall portion matingly shaped to engage the cylindrical drive hub end at its pair of adjoining semi-cylindrical wall portions.

Abstract: An accessory for a photographic camera having no built-in capability for remote operation of the operating or shutter button of the camera.

Abstract: A camera backcover closing prevention device capable of preventing the backcover of a camera from accidentally closing due to its own weight when a user of the camera wishes to load into or unload the film from the camera. The camera backcover closing prevention device includes a backcover rotatably attached to a camera and having an end portion, and latching member in the camera and engageable with the end portion of the backcover for stopping the rotation of the backcover when the backcover is fully open.

Abstract: A data printing apparatus of this invention controls the emission timing or the emission interval of a light-emitting means on the basis of a signal according to traveling of a sheet film along a traveling path so as to print data free from blurring of characters or a variation in interval between characters on the sheet film having no perforations. After an exposure operation is ended, the apparatus feeds the sheet film from an exposure position along a spool wall. Light corresponding to digital numerals representing a date is emitted by light-emitting elements, and the date to be printed by the light-emitting elements is focused on the sheet film by an optical system. The date on the sheet film is printed during traveling of the sheet film along the spool wall.