Canon Kabushiki Kaisha

Shohei Takeda

Makoto Sekita

Ryosuke Miyamoto

Nobuaki Date

Masatake Kato

Tetsuro Fukusaka

Katsuhiro Ishido

Kazunori Togashi

Yuichi Makino

Takashi Soya

Shinichiro Wakahara

Masafumi Kamei

Naoki Okuda

Jiro Futagawa

There is provided an image reading apparatus for acquiring a read signal of an image by receiving and photoelectrically converting a light reflected from a document. The location of an alien substance on an original plate is detected based on a reflected light received by a light receiving unit adapted to receive a light reflected from a document. When an alien substance is detected, an illumination unit selectively illuminates the location in which the alien substance has been detected. Also, a message which prompts cleaning of the alien substance is displayed. A method of displaying the alien substance location are also provided. Thereby, the image reading apparatus of the present invention can assists a user in cleaning the alien substance such as a dust or dirt on the original plate.

Image reading apparatus and method of displaying alien substance location thereof

A sheet conveying device has a sheet-position detection sensor which has CCDs or CISs and which is attached in an inclined manner such that a vertical distance from the sheet-position detection sensor to a sheet-conveying path or to a sheet conveyed along the sheet-conveying path differs between the proximal edge and the distal edge of the sheet-position detection sensor in a direction perpendicular to the sheet-conveying path.

Sheet conveying device with sensor positioned at vertical angle and image forming apparatus containing same

An emitted-radio-wave shield capable of preventing the leakage of emitted radio waves from a circuit board includes a shield box, which houses the circuit board, and a shield plate that is easy to attach and remove in order to access the circuit board. A shield member, which is disposed at a joint between the shield box and the shield plate and is electrically connected with the shield box, shields emitted radio waves from the circuit board in a state in which the shield plate is secured to the shield box. The shield plate is formed to have a plurality of protrusions, which project toward the shield member, at a part thereof that contacts the shield member.

Emitted-radio-wave shield and image forming apparatus using same

An image forming apparatus for forming an image on a recording medium, comprising a first frame, a second frame rotatable with respect to the first frame around a rotational center, and a gripper portion formed on the first frame at a position immediately below the hinge means, to be gripped for lifting and transmitting the image forming apparatus. The image forming apparatus can be made light weight and inexpensive, and stable transportation of the apparatus is ensured.

Image forming apparatus having a gripper portion

An electronic camera having an image sensor responsive to a preliminary exposure for producing an output signal, a computing circuit for computing a proper exposure condition on the basis of the signal, and a compensating circuit for compensating the exposure value in accordance with the proper exposure condition is provided with a compensation prohibiting circuit for prohibiting the exposure compensation by the preliminary exposure by taking into account the object condition and the exposure mode.

Electronic camera with dual exposure and selective recording

An exposure device with a shutter operating in such a manner that the size of aperture opening defined by the shutter blades first increases from zero and then starts to decrease in predetermined timing, comprises a mechanism for opening the shutter with the help of an electric motor, while charging a spring as the drive source for closing movement of the shutter, an electromagnet arranged upon current supply to change the driving of the shutter from the opening mechanism to the spring, and a control circuit for controlling the operation of the shutter in such a manner that when taking one picture, the shutter blades reciprocate two times continuously to recycle substantially twice the exposure operation, as the operation of each of the motor and the electromagnet is recycled twice.

Exposure device having an actuatable shutter release

Electronic camera with exposure control

An attachment lens and a camera system, comprising an attachment lens adapted to be attached to the subject side of a camera which is equipped with separate optical openings for the photography system, the finder system, the photometry system, and the colorimetry system. The attachment lens includes an optical element which is on the camera side and which is equipped with a plurality of integrally formed sections facing the optical openings of the camera and having different refractive power configurations, thereby allowing the optical systems to be arranged close to each other.

Growing community of inventors

Ibaraki, Japan

Shohei Takeda