Abstract: An image processing system has a reader with an image sensor, a retention memory unit connected to the reader, and a printer connected to the retention memory unit. The reader, the retention memory unit and the printer have a hierarchical control structure in order named. The retention memory unit has dynamic RAMs each of which stores image data of at least one page. The image data entered at the reader is selectively stored in the RAMs. When an operator wishes to form the image represented by the image data on a plurality of copying sheets, the corresponding original is scanned only once before copying on the first copy sheet. For the second and subsequent sheets, the image signal is selectively read out from the RAMs. The signal readout is inhibited by selectors and gates in the retention memory unit in response to logical states of corresponding flags at the end of copying.

Abstract: An image reading apparatus comprises, in a preferred embodiment, LEDs and image sensors for reading image and location information of an original, another LED and a photo sensor for generating a read start clock, memories for storing the image and location information read by the image sensors in one-to-one correspondence, a transparent sheet with matrix stripes placed on the original to provide the location information of each image information, and a CPU for controlling the operation sequence and detecting a ramp in the reading apparatus.

Abstract: In a flash photography system which controls the amount of flash based on an aperture value of a lens set by detecting reflected light from an object which is preliminarily illuminated prior to main illumination, the angle of illumination coverage of a main light issuing portion is variable, and the amount of light from the preliminary illumination is determined corresponding to that varied angle. The aperture value of the lens is properly set by the preliminary illumination corresponding to that varied angle.

Abstract: In an electronic flash apparatus which is provided with a first discharge tube for bounce illumination and a second flash discharge tube for direct illumination, emission of flash light by the first flash discharge tube and emission of flash light by the second are arranged to separately begin and to simultaneously end to simplify complex circuit arrangement otherwise required for having the amount of light reflected by the object of flash light emission by the first discharge tube and that of flash light emission by the second discharge tube in a fixed ratio. The second discharge tube is arranged to flash without fail despite of the simplified circuit arrangement.

Abstract: A display device in which display contents to be displayed by a display element such as a liquid crystal, as well as display portions and display forms can be recognized and display patterns can be easily recognized in cases where complicated photographing information is displayed.

Abstract: When the disclosed automatic focusing device detects that a computed distance measurement is inaccurate, it shifts the lens a predetermined length to a new position for another measurement. A system senses when the inaccuracy arises from an overly dim scene, for which a distance cannot be properly measured in any case, and inhibits the successive shifts to avoid waste of energy.

Abstract: A flash device for a photographic camera is arranged either to inhibit a flashing action or to shift the control mode of the camera from flash photography to daylight photography in cases where an object to be photographed is located outside of the adequately operatable range of distance. A pre-flashing action is performed to detect a distance to the object when a main capacitor is charged to a given level before the capacitor is amply charged for flash photography. Then flash photographing is performed at an aperture value determined on the basis of the detected distance when the distance is within the adequately operatable distance range. In the case where the detected distance is outside of the adequately operatable distance range, the main capacitor is further charged for an increased flashing power.

Abstract: In the disclosed electronic flash, camera operation at various depths of field is made possible by producing a diaphragm-setting signal in response to a preliminary flash directed at a preliminary object, converting this signal to a digital value, and adjusting the main flash in response to light reflected from a main object and in response to the digitally memorized diaphragm setting signal.

Abstract: A flash device for a photographic camera either inhibits a flashing action or shifts the control mode of the camera from flash photography to daylight photography in cases where the object to be photographed is located outside of an adequately operable distance range. A pre-flashing action detects a distance to the object when a main capacitor is charged to a given level before the capacitor is fully charged for flash photography. Then flash photography is performed at an aperture value determined on the basis of the detected distance when the distance is within the adequately operable distance range. When the detected distance is outside of the adequately operable distance range, the main capacitor is further charged for an increased flashing power. Then the distance to the object is again detected by a second preflashing action before flash photography is carried out at an aperture value determined on the basis of the distance detected by the second pre-flashing action.

Abstract: In an automatic electronic flash device of the computer type for a camera, information on the F-number of full aperture of a lens mounted on the camera is transmitted to the flash device and, in the case where the full aperture F-number of the lens is larger than a predetermined full aperture F-number, the light control level of the flash device is changed according to the full aperture F-number of the lens.

Abstract: Disclosed is a power supply control device which automatically cuts off power to a flash apparatus by turning off a power switch a predetermined time after the switch is turned on to prevent waste of electrical energy arising from careless failure to turn off the power switch. The power supply control device is provided with a timer circuit which sets the predetermined period of time and is arbitrarily resetable with a manually operable power switch.

Abstract: In a passive type automatic focusing device which cannot detect an in-focus state for a dark object, an auxiliary light source is used. When preparation of light emission of the auxiliary light source is completed, a photo-taking lens driver of the automatic focusing device for the photo-taking lens is activated to drive the photo-taking lens to the in-focus position.

Abstract: A flash device for a photographic camera either inhibits a flashing action or shifts the control mode of the camera from flash photography to daylight photography in cases where the object to be photographed is located outside of an adequately operable distance range. A pre-flashing action detects a distance to the object when a main capacitor is charged to a given level before the capacitor is fully charged for flash photography. Then flash photography is performed at an aperture value determined on the basis of the detected distance when the distance is within the adequately operable distance range. When the detected distance is outside of the adequately operable distance range, the main capacitor is further charged for an increased flashing power. Then the distance to the object is again detected by a second preflashing action before flash photography is carried out at an aperture value determined on the basis of the distance detected by the second pre-flashing action.

Abstract: The disclosed flash photography system operates in a first mode by controlling the flash on the basis of the distance information signals, and in a second mode by controlling the flash in response to the flash illumination of the object to be photographed. The system insures accurate flash photography by shifting from the first mode to the second mode when the camera uses a lens with a short focal length or with an attached filter.

Abstract: In the disclosed distance measuring system, a light measuring circuit measures light reflected from an object whose distance is to be measured. An output arrangement responds to the light measuring circuit by producing an output in the form of a signal representing a distance to an object. A device widens the scanning range of the distance measuring system when the object is more difficult to observe than usual.

Abstract: A flash photographing device of the type which detects the distance up to an object by a preliminary flash emission so as to control the diaphragm according to the detailed object distance, while the light adjusting level of the light adjusting speed light device is set according to the detected object distance. In the case of a flash photographing device of this type, a proper exposure can be guaranteed when a detected object distance is within the range of the operational engagement of a light adjusting circuit, while the exposure is improper when the distance is beyond the range. The arrangement of the present invention provides a flash photographing device of the above-described type which controls the diaphragm at the smallest aperture value of the lens independently of the value of a detected object distance when the detected object distance is beyond the range of operative engagement.

Abstract: A flash photography system including a computer type electronic flash device and a camera controlling the exposure value by using the light coming from an object to be photographed and reflected from the shutter curtain and/or film surface is disclosed. The leading and trailing curtains in the slit shutter of the system run down simultaneously when test firing occurs, and the flash device controls the amount of flash light in accordance with an equivalent reflected light from the shutter curtain surfaces to that from the film surface. When the aforesaid amount of light reflected has reached a prescribed level, an annunciator is energized to inform the operator that a correct exposure can be obtained.

Abstract: There is disclosed an electronic flash system having a diaphragm which is operated on the basis of an aperture control signal from an electronic flash device. A light sensitive element position in the camera system produces an electrical signal representing the amount of flash light passed through the aforesaid diaphragm of the adjusted aperture size. A circuit for controlling the amount of flash light emitted from the flash device controls the amount of flash light based on the electrical signal.

Abstract: An annunciating apparatus for use with an electronic flash system includes a flash system which employs a trigger device generating a trigger signal at a time of test light emission and a light producing device responsive to the trigger signal for initiating operation of the light producing device to produce light. The annunciating apparatus includes a light sensitive device arranged to receive light passed through a photographic taking lens and produces a first electrical signal corresponding to an amount of light from a scene. The annunciating apparatus also includes a signal generating device for producing a second electrical signal corresponding to an aperture value preset on a camera at the time of test light emission for the electronic flash system and a comparison device for receiving the first and second signals to produce a control signal when the first electrical signal reaches a predetermined level.

Abstract: Disclosed is a slide switch in which a slide is slidable between a first position and a second position. A holding arrangement holds the slide in the second position when the slide has moved into the second position and permits the slide to return from the second position to the first position after a given lapse of time. A manually operable lever covering the slide serves to operate the slide. The lever is held at least at one position and forms a recess sufficiently large to enable the slide to return from the second position to the first position.