Fuji Photo Optical Co., Ltd.

Fuji Photo Film Company, Limited

Fujinon Corporation

Motohiko Horio

Naoki Kobayashi

Kouji Kaneko

Fujio Okada

Kiyotaka Kaneko

Kazukiyo Tamada

Kazutsugu Ogata

Hideo Kobayashi

Masahiro Konishi

Takao Ozaki

Akira Muramatsu

Akio Ohmiya

Koichi Nagata

Kiyotaka Sato

Motoyoshi Furusawa

Shyuichi Togashi

Isumi Miyake

A lens device is provided and includes: a lens barrel body; a lens frame swingably attached to the lens barrel body; and a swing mechanism being adapted to swing the lens frame so that alignment of an optical axis of the lens device can be effected, the swing mechanism including: an elastic unit interposed between the lens barrel body and the lens frame, the elastic unit biasing the lens barrel body and the lens frame in directions away from each other or in directions nearing to each other; and an advancing and retracting unit disposed at three points in a circumferential direction defined by the lens barrel body and the lens frame, the advancing and retracting unit advancing or retracting the lens frame relative to the lens barrel body against a bias force of the elastic unit to swing the lens frame.

Lens device

Guide bars supporting a plurality of lens frames are inserted through the opening formed in a side of a lens housing. The direction of insertion is perpendicular to the optical axis of the lenses supported by the lens frames. The guide bars and lens frames are then arranged at predetermined positions in the lens housing. Then, a cam tube is inserted through the opening in the direction perpendicular to the optical axis. Cam pins formed on the lens frames are then coupled to cam grooves formed in the cam tube.

Zoom lens device and method of assembling the same

An electronic still camera which photographs an object by image pickup means such as a solid image pickup element or the like and records the video signal of the object into a rotary recording medium such as a magnetic disc or the like. The electronic still camera includes a mechanical shutter and an electronic shutter function to control electrically the accumulation time of the image pickup means and it is adapted such that, when the shutter speed is slower than a predetermined value, it controls a time for exposure to the image pickup means by the mechanical shutter and, when the shutter speed is higher than the predetermined value, it controls the exposure time to the image pickup means by means of the electronic shutter function and also controls the mechanical shutter to remain open at least for the exposure time.

Electronic still camera

An electronic camera includes an electronic camera unit for generating a still image signal, an encoder for converting the still image signal from the electronic camera unit into a television signal and for issuing the television signal through an output terminal to a video recorder, and an electronic viewfinder for displaying the television signal as a visible image. The encoder and the electronic viewfinder are contained in an adapter detachably connected to the electronic camera unit. The television signal from the encoder is applied directly to a video circuit in the video viewfinder, and also delivered through a connector or a coupling terminal to the video recorder.

Electronic camera

A method of controlling diaphragm driving in an electronic still camera, wherein a diaphragm is controlled such that an exposure value of a subject on an image forming screen can become a proper exposure value, and a device therefore. In this control of diaphragm driving, the photometric values obtained from every times of photometry are determined to be higher or lower than the proper exposure value. When the photometric values are determined to be higher than the proper exposure value continuously given times, the diaphragm is closed until the photometric values are determined to be lower than the proper exposure value. When the photometric values are determined to be lower than the proper exposure value continuously the given times, the diaphragm is opened until the photometric values are determined to be higher than the proper exposure value.

Method of controlling diaphragm driving in electronic still camera and

The present invention is concerned with an electronic still camera for photographing a subject by use of an image sensing device such as a solid state image sensing device and the image signal thereof is recorded into a rotary recording medium such as a magnetic disc. With this electronic still camera, photographing in an electronic view finder ( EVF) mode and a movie still mode in addition to a normal mode can be performed. The EVF mode is the mode for making exposure of the image of the subject to the normally open image sensing means by use of an electronic finder to observe the subject, and subsequently, releasing an exposure device for a period of time required for the exposure to make exposure of the image of the subject to an image sensing device. The movie still mode is the mode for steadily rotating a spindle motor in synchronism with a synchronous signal generator, outputting a video signal to the outside through an interface and recording a still image into the rotary recording medium in response to an exposure command.

Variable mode electronic still camera including optical and electronic

A magnetic head device comprises a first sheet retainer member which is adapted to be brought into contact with a magnetic recording sheet at a first position on one side of the magnetic recording sheet, a second sheet retainer member having a contact surface which is adapted to be brought into contact with the magnetic recording sheet at a second position near the first position on the other side of the magnetic recording sheet, and a magnetic head accommodated in an opening formed in the contact surface of the second sheet retainer member to be brought into contact with the magnetic recording sheet.

Mechanism for retaining a flexible magnetic sheet in position for

An image pickup apparatus using an image sensor is provided with a rotary shutter that controls the amount of time the image-forming light strikes the image sensor. A synchronism detector is provided to detect the phase difference between the rotation of the rotary shutter and the scanning of the image sensor by comparing the phase signals produced according to the speed of rotation of the rotary shutter and vertical synchronizing signals periodically produced as well as scanning signals for scanning the image sensor. When there is no phase difference between the two signals, the synchronism detector provides an operation signal which causes a switching circuit to be conductive, so as to permit an image recorder to record images. On the other hand, if there is a phase difference, the synchronism detector provides no operation signal and the switching circuit is rendered non-conductive so as to prevent the image recorder from recording images.

Image pickup apparatus with a rotary shutter

A magnetic head feed device for feeding a magnetic head for recording information on a magnetic recording disk and/or reproducing information from the magnetic recording disk in a radial direction of the magnetic recording disk includes a driving force source which outputs a driving force for feeding the magnetic head as a rotational motion thereof, a rotational motion-linear motion converting mechanism for converting the rotational motion of the driving force source into a linear motion of the magnetic head. The rotational motion-linear motion converting mechanism includes a spur gear to be rotated upon rotation of the driving force source, a shaft portion which is coaxially connected to the spur gear to be rotated together therewith and is provided with an enlarged diameter portion having a male thread portion formed on the outer surface thereof, a female screw unit having an elongated passage through which the shaft portion extends and which is longer than the enlarged diameter portion of the shaft portion, the female screw unit being fixedly mounted and provided with a female thread portion into which the male thread portion of the shaft portion is screwed, and a pair of lid members which are mounted on the respective ends of the passage to close the passage and are provided with circular central openings through which the shaft portion extends into the passage and projects therefrom so that the enlarged diameter portion is positioned between the lid members.

Magnetic head feed mechanism including a dust preventing means

A rotary shutter adapted to be used in an electronic still camera comprises a rotatable shutter having shutter openings which are variable in size. The shutter is rotated by an electric motor in order to open and close intermittently an exposure aperture of the camera. A phase detector for detecting the phase of rotation of the shutter member provides a series of phase signal, and cooperates with a signal generator for generating stop signals in synchronism with the phase signals when a particular shutter speed is selected and a circuit for braking the motor to stop the shutter member. Responsive to the particular shutter speed selecting operation, the shutter opening is opened to its maximum size and the rotary shutter is simultaneously stopped quickly in position so as to open fully the exposure aperture of the camera.

Rotary shutter

A rotary shutter device for use in an electronic still camera or a VTR camera has an XY-addressable solid-state imaging device for converting an optical image read by successive horizontal scanning into a video signal, a shutter blade disposed in front of the solid-state imaging device and rotatable about its own axis, the shutter blade having at least one opening for transmitting light therethrough onto the photodetector surface of the solid-state imaging device, and an adjusting blade disposed adjacent to the shutter blade for varying the opening angle of the opening. The shutter and adjusting blades are rotatable together in a direction to successively expose the solid-state imaging device to incident light in the direction in which the solid-state imaging device is vertically scanned. The scanning of the solid-state imaging device for one field is completed between two successive exposures thereof through the opening in the shutter blade.

Rotary shutter device

In a film wind-up mechanism of a photographic camera, a wind-up shaft to which a wind-up lever is fixed is divided into an upper portion and a lower portion. The wind-up lever is fixed to the upper portion, and the lower portion is fixed to a spool gear for driving a film take-up spool. A friction means is provided between the spool gear and the take-up spool.

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Saitama, Japan

Motohiko Horio