摘要:
Disclosed is a single lens reflex camera having an electrically driven focal plane shutter. A locking arrangement locks the shutter curtains in their start positions before shutter release to prevent unintentional actuation of an exposure due to faulty operation of switches, shock, or the like. Upon completion of the upward movement of the quick return mirror, the locking mechanism is disabled.
摘要:
A camera having an electromagnetic driving source for operating a focal plane shutter in the camera, includes a shutter base plate and a driving arm pivoted on the base plate for swinging movement in a plane parallel to the plate. A group of thin shutter blades are supported on the driving arm parallel to the surface of the base plate. The output shaft of a motor is coupled with the driving arm, and either one of the rotor of the motor, or a permanent magnet forming a part of the stator of the motor, provides magnetic flux parallel to the axis of the output shaft, thereby causing the rotor to rotate the output shaft and drive the focal plane shutter.
摘要:
In a camera provided with an electromagnetic drive source when energized producing an electromagnetic force by which the shutter is driven to move, the above-described electromagnetic force of drive source is used only as the power of driving the shutter, while an electromagnetic device which is controlled by a shutter closing signal is provided, so that an initiation of returning movement of the mirror and automatic diaphragm and of lock releasing operation of the film transporting mechanism is controlled by said electromagnetic device.
摘要:
A slit exposure shutter having the front and rear screens thereof respectively arranged to be driven by a source of an electromagnetic driving force is provided with a minimum slit width insuring means which prevents uneven exposure resulting from difference in travelling speed between the front and rear shutter screens during a high speed shutter operation and particularly prevents a total absence of the slit, the shutter is also provided with a nullifying means which nullifies the insuring means when the shutter screens are on their return travels.
摘要:
A shutter device for a still video camera comprises first and second shutter blades, a latch member and an unlatch member. The latch member latches the first blade at its moved position where an image pickup element is exposed to an image light. The first blade is kept latched for a preparatory exposure to correct a set exposure value on the basis of the output of the pickup element or for picking up a motion picture. The unlatch member releases the latching of the first blade. In one embodiment, the unlatch member is provided on the second blade to unlatch the first blade when the second blade is moved to terminate the exposure. In other embodiments, the unlatch member includes an electromagnet to unlatch the first blade.A still video camera comprises a view finder mirror and a mirror operating mechanism. The mechanism includes a motor and is arranged to retract and return the mirror relative to an optical path by utilizing a normal and a reverse rotation of the motor, respectively.In the disclosed embodiments, the camera further comprises a mechanism to maintain the mirror in the retracted condition and a shutter in the opened condition to operate in a motion video mode where an image pickup element is continuously exposed to an image light. The mechanism for setting in the motion video mode may be operable manually from the exterior of the camera or by connecting an external device to the camera.
摘要:
In an image sensing apparatus having an image sensor which converts an optical image of an object into an electrical signal, a view finder for monitoring the optical image equivalent to the image incident on the image sensor, an optical member arranged in the path of light incident on the image sensor to selectively guide the light to the image sensor and also to the view finder, an exposure member which is at least partially disposed in between the object and the optical member and is arranged to control an exposure and a light receiving element which is arranged separately from the image sensor, a control circuit is arranged to cause the light receiving element to form a first photometric information when the optical member guides the optical image to the view finder; to control the exposure member on the basis of the first photometric information while the optical image is led to the image sensor by the optical member; to cause, after that, the image sensor to form a second photometric information; and again to control the exposure member on the basis of the second photometric information.
摘要:
An image sensing apparatus is arranged to have the image of one and the same object received by a plurality of image sensing devices through shutters discretely arranged in pairs with these image sensing devices respectively. The apparatus is provided with a synchronizing circuit for synchronizing exposure timings of these shutters.
摘要:
A shutter device for a still video camera comprises first and second shutter blades, a latch member and an unlatch member. The latch member latches the first blade at its moved position where an image pickup element is exposed to an image light. The first blade is kept latched for a preparatory exposure to correct a set exposure value on the basis of the output of the pickup element or for picking up a motion picture. The unlatch member releases the latching of the first blade. In one embodiment, the unlatch member is provided on the second blade to unlatch the first blade when the second blade is moved to terminate the exposure. In other embodiments, the unlatch member includes an electromagnet to unlatch the first blade.A still video camera comprises a view finder mirror and a mirror operating mechanism. The mechanism includes a motor and is arranged to retract and return the mirror relative to an optical path by utilizing a normal and a reverse rotation of the motor, respectively.In the disclosed embodiments, the camera further comprises a mechanism to maintain the mirror in the retracted condition and a shutter in the opened condition to operate in a motion video mode where an image pickup element is continuously exposed to an image light. The mechanism for setting in the motion video mode may be operable manually from the exterior of the camera or by connecting an external device to the camera.
摘要:
An image sensing apparats comprises a plurality of image sensing devices, a beam splitter for supplying an image of an object to the plurality of image sensing devices, and a plurality of shutters, each of which is disposed between the beam splitter and a respective one of the plurality of image sensing devices. The shutters are arranged to travel in the same direction relative to the image of an object formed on each of the plurality of image sensing devices and a detector is provided for detecting that all of the plurality of shutters means are in a full open state.
摘要:
An image sensing device includes an image sensor; a photometric element which is arranged separate from the image sensor to measure light with a diaphragm aperture fully opened; a storing time control circuit arranged to variably control the storing time of the image sensor; a circuit arranged to form exposure control information from the output of the image sensor on the basis of the output of the photometric element at least under a condition in which the storing time is controlled by the storing time control circuit; and an exposure control circuit arranged to control the exposed condition of the image sensor on the basis of the exposure control information.