摘要:
A film winding system has a spool which houses a motor as a driving source and a driving force conveying mechanism including an epicycle gear. The driving force conveying mechanism for conveying the driving force from the motor to the spool further includes a clutch mechanism for facilitating film removal from the spool effected by pulling the film, without cutting the film or breaking gears.
摘要:
A drive device for a lens barrel and a diaphragm shutter is disclosed. The drive device of this invention comprises a stepping motor including a stator and rotors. The stator is constituted by a plurality of stator members disposed around a lens barrel, each having a bifurcate portion around which a conductor is wound, and the bifurcate portions are disposed in face-to-face relationship with each other with a predetermined space being interposed therebetween. The rotors are respectively disposed in the predetermined spaces. The driving forces of the rotors are independently transmitted at least to the lens barrel including a photographic lens element and to a diaphragm shutter.
摘要:
A compact illuminating apparatus for viewing films by transmitted light and having uniform light distribution across a diffusing plate, comprising a shallow elongated box-like main body having a base with a bottom having alternately arranged mountains and valleys walls or side parts of the box adapted to hold said diffusing plate; a frame arranged to close the box like base; a reflecting member having reflectance higher than that of said base and arranged on said bottom of said base; and an illuminating member comprising (1) light sources disposed below said diffusing plate, and (2) light-source-control member connected electrically with said light sources for controlling the operation thereof.
摘要:
In an automatic focusing apparatus which detects sharpness signals from high-frequency components of brightness signals contained in video signals from video cameras and which stops a focusing lens of the video camera at a position at which its peak value is obtained, the movement of the focusing lens is started by detecting received light signal levels by performing projection-reception operations with a specified amount of infrared light and detecting their variations with a received light signal level detector or with a micro-computer. Furthermore, depending upon the focal depth of the focusing lens, priority is given to processing of distance information based on sharpness signals or distance information determined by the infrared light projection-reception operation in the lens driving controller for performing the focusing operation. According to the automatic focusing apparatus of the present invention, movement of the lens only due to variations of contrasts can be avoided, and stable image pictures are thus obtainable. Also, the most suitable focusing operation mode for a particular focal depth of a lens in use can be selected.
摘要:
Driving of camera lens (5) and driving of exposure mechanism (9) (shutter/aperture blades) are driven by a single motor (7) wherein a main body of exposure mechanism is affixed to the lens barrel, and a drive member (10) of the exposure mechanism (9) is slidably engaged to a sliding guide pin (11); and by selecting friction force between a hollow threaded driving member (1) and the threaded outer face of the lens burrel (4) appropriately, the exposure mechanism (9) can be driven through the friction force.
摘要:
A photographic lens device with a built-in electronic aperture-stop control system or mechanism comprising a step motor and an aperture-stop setting device which are spaced apart from each other by a suitable distance in the direction of the optical axis of the photographic lens system and are coupled to each other through a coupling means. In one embodiment, the aperture-stop control system can be incorporated in the lens device simply by slightly enlarging the diameter of the lens device or barrel without increasing its axial length because of full possible use of a heretofore unused dead space available in the lens device.
摘要:
So far, the windows for displaying the number of frames exposed, a film speed, an aperture, a shutter speed and the like have been located at various positions on a camera body, but according to the present invention such photographic information can be displayed at the same place in the vicinity of a viewfinder or in the field of view thereof by a display device comprising an electro-optical display unit and a display information selection means adapted to cause the display unit to display the desired information.
摘要:
An automatic film transport device for use in cameras has a first function of (i) automatically completely unrolling an unexposed film from a film case or magazine and winding it on a take-up reel or spool and a second function of (ii) automatically rewinding the film into the film case or magazine by a predetermined length (corresponding to the width of one frame) each time one exposure has been completed. Therefore, even when one erratically opens the camera back when the film is still loaded in the camera, the exposed frames have been already rewound into the light-shielded film case or magazine, so that they may be prevented from being ruined or reexposed. In addition to the first and second functions as described above, the automatic film transport device may be provided with a function or capability of counting and displaying the number of all exposable frames on the film wound on the take-up reel or spool or the remaining number of exposable frames.
摘要:
A light emitting element driver includes: a light emitting element; driving means; an electric accumulation element; and a battery power supply that can supply electric power to the driving means and the electric accumulation element, wherein the driving means is configured so as to be able to switch between a state in which the electric accumulation element accumulates the electric power supplied from the battery power supply and a state in which the electric accumulation element supplies the accumulated electric power to the light emitting element, the driving means connects the electric accumulation element and the light emitting element in parallel to each other with respect to the battery power supply when the electric accumulation element accumulates the electric power supplied from the battery power supply, and the driving means connects the battery power supply, the electric accumulation element, and the light emitting element in series when the electric accumulation element supplies the accumulated electric power to the light emitting element. According to the above configuration, a light emitting element driver that can achieve the miniaturization of the apparatus and a mobile device are provided.
摘要:
A driving circuit for a stepping motor drives the stepping motor in two-phase operation for most of the time period of driving and switches to a single-phase operation immediately before stopping the stepping motor, thereby achieving compatibility between high speed rotation and stable stopping position.