Canon Kabushiki Kaisha

Kazuhiro Izukawa

Ichiro Okumura

Takayuki Tsukimoto

Takuo Okuno

Akira Hiramatsu

Hitoshi Mukohjima

Naoya Kaneda

Hiroyuki Seki

Etsuro Furutsu

Kho Ishizuka

Chikara Aoshima

Nobuhiko Shinoda

Yoshihiko Aihara

Toru Nagata

Toshiharu Ueda

Koichi Ueda

Kazuya Higuma

A camera communication unit is configured to change a voltage applied to a communication terminal used for a communication with the lens unit. The camera communication unit is configured to communicate with the lens unit using one of a first communication mode and a second communication mode, the first communication mode setting the voltage applied to the communication terminal to a first range and enabling the communication with the lens unit using a communication method of a first communication speed, and the second communication mode setting the voltage applied to the communication terminal to a second range that is located on a lower voltage side than the first range and enabling the communication with the lens unit using a communication method of a second communication speed higher than the first communication speed.

Camera, lens unit, and image-pickup system

The present invention discloses an image taking apparatus which can control image deterioration caused by the image size of an attached lens apparatus and image generating region of an image pickup element not corresponding. The image taking apparatus has an image pickup element which photoelectrically converts an object image formed by the attached lens apparatus; an image producing section which produces recording image data to be recorded based on an output from the image pickup element; and a controller which judges an image size of the attached lens apparatus and changes an image producing region for producing the recording image data within a light receiving region of the image pickup element based on the judged image size.

Image taking apparatus, image taking system, and lens apparatus

An image blur correcting system includes a photographing device including arithmetically operating means for determining a relation between a detection output value of the blur detecting means and a driven amount of the image blur correcting means corresponding to the detection output value in accordance with information related to a blur prevention sensitivity, conducting arithmetic operation on the basis of the determined relation to calculate a drive signal for driving the image blur correcting means in accordance with the detection output value of the blur detecting means, and transmitting means for transmitting the drive signal calculated by the arithmetically operating means to the optical device, and an optical device including transmitting means for transmitting the information related to the blur prevention sensitivity to the photographing device, and drive control means that receives the drive signal for controlling the driving of the image blur correcting means in accordance with the drive signal.

Image blur correcting system

A camera system is composed of an accessory and a camera main body, where the accessory can be mounted on the camera main body, communication is performed between the accessory and the camera main body, and the accessory is supplied with power from the camera main body; the camera main body can supply power having a plurality of different voltages to the accessory, performs communication between the camera main body and the accessory, determines the voltage of the power suitable for the accessory from power supply voltage information of the accessory obtained by communication between the camera main body and the accessory and supplies the power to the accessory, whereby the voltage of the power to be supplied from the camera main body to the accessory can be correctly and promptly determined for each accessory even if there are alternative accessories which require either two types of voltages or three or more types of voltages.

Camera and camera system for selectively supplying variable power to accessory mounted on camera main body based on communication between camera and accessory

An apparatus to which an accessory is connected includes a plurality of connection terminals at which the accessory is connected. With the accessory connected to the apparatus, the apparatus first detects states of the plurality of connection terminals by setting at least one connection terminal of the plurality of connection terminals for signal outputting, and then detects states of the plurality of connection terminals by setting at least one connection terminal of the plurality of connection terminals for signal outputting, the connection terminal set for signal outputting for the second time being different from the connection terminal set for signal outputting for the first time. Then, the apparatus determines a kind of the accessory mounted to the apparatus, on the basis of results of detection obtained for the first time and for the second time.

Accessory, apparatus to which the accessory is connected, accessory system, and lens adapter system composed of optical apparatus and a plurality of lens adapters

This invention relates to a driving device for a vibration wave motor and, more particularly, to a driving device for setting the level of a driving periodic signal to a low level in driving within a predetermined range of high driving frequencies, and to a high level in driving within a predetermined range of low driving frequencies, thereby reducing the power consumption.

Driving device for a vibration type motor

The present invention relates to a camera having a reproducing circuit for reproducing information recorded in a magnetic recording portion of a film. This invention provides a camera capable of properly reproducing information by using the reproducing circuit in such a manner that the reproducing characteristics of the reproducing circuit are adjusted in accordance with the speed at which said image recording member is fed.

Camera having magnetic signal reproducing circuit with adjustable gain

In a camera system composed of a camera capable of containing a battery therein and an accessory capable of being detachably mounted on the camera and being supplied with electric power from the camera, communication is possible between the camera and the accessory, and the accessory, upon receiving an instruction from the camera, performs an operation according to the received instruction. The camera system is provided with a circuit which sends an instruction designating a value corresponding to electric power usable by the accessory from the camera to the accessory, to decide a working power or voltage usable in the accessory.

Camera system, camera and camera-accessory

There is disclosed vibration wave motor comprising: a movable member; a molded elastic member having a surface for urging the movable member; and a piezoelectric member arranged in contact with the elastic member to apply vibration to the elastic member and produce a travelling vibration wave in the surface of the elastic member.

Vibration wave motor

A camera utilizing an image recording medium cartridge provided with a cover for extracting and introducing an image recording medium comprises operation means for operating the cover of the cartridge loaded in the camera; response means for moving the cover of the cartridge in response to the operation of the operation means; and release means for maintaining the operation means in an operable state but causing the response means not to respond to the operation of the operation means in at least either of a situation where the cover of the cartridge is open and a situation where the image recording medium is extracted from the cartridge, or the camera comprises determination means for determinating, after the power supply is turned on, at least either of state of the cover of the cartridge loaded in the camera prior to the turning-on of the power supply and state of the image recording medium, or the camera comprises determination means for directly determinating state of the cover itself of the cartridge loaded in the camera or a member following the movement of the cover.

Camera utilizing cartridge with movable light shield cover

A camera of the kind having a magnetic head for magnetically recording data in a track part of each frame portion of a film is arranged such that, in re-recording information in the track part having a previous record of data, a predetermined signal for erasing information is supplied to the head during a period other than a period during which a data signal is supplied to the head, so that new data can be recorded by completely erasing, without fail, the previous record of data in carrying out the re-recording.

Camera having magnetic recording head

A camera uses a film having a magnetic record member for each frame on film. When the film is loaded in the camera, the information recorded in the record member of each frame is detected. It is judged whether each frame is exposed or unexposed. Even if some frames on the leader side and on the trailer side of film were already exposed, the camera can perform accurate positioning of first unexposed frame and exposure on each unexposed frame.

Magnetic record camera

A camera adapted for using a film cartridge of the kind having a magnetic recording part provided for each frame portion of a film contained therein is arranged to write information into the recording part every time a shot is taken for each frame. In case where the film contained in the film cartridge is used only halfway, the camera makes a search for the beginning part of unexposed frame portions by detecting the amount of information recorded in the magnetic recording part of each frame portion. For this purpose, a reference value to be used in making a discrimination between an exposed state and an unexposed state is set on the basis of the amount of information obtained from each frame and also according to the amounts of noises, etc. The arrangement disclosed enables the camera to accurately carry out the search for the unexposed frame portions of the film.

Camera

In a demodulation circuit for demodulating a pulse position modulation (PPM) signal, and a camera having the demodulation circuit, a change in PPM signal is counted by an up/down counter which is switched between count-up and count-down modes every time the PPM signal changes. When a carry signal is output from the counter, the carry signal is latched, and the PPM signal is demodulated into binary data on the basis of the presence/absence of the carry signal in the count-up mode and the carry signal in the count-down mode.

Growing community of inventors

Misato, Japan

Kazuhiro Izukawa