Fujitsu Corporation

Fujitsu Frontech Limited

Ricoh Company, Ltd.

Kozo Yamazaki

Masanori Ohkawa

Isao Iwaguchi

Toshiyuki Ichikawa

Mitsuo Watanabe

Hiroshi Watanuki

Hideo Miyazawa

Mitsuharu Ishii

Hiroyuki Ikeda

Fumio Yamagishi

Toshimitsu Kumagai

Hiroaki Kawai

Hirokazu Aritake

Kazunori Bannai

Takefumi Inagaki

Shinichi Sato

Yoshinobu Sakaue

Yuichirou Takashima

Yoshitaka Murakawa

Yuuki Shiga

Yuuichiro Takashima

Tatsuya Miyadera

Takashi Kaku

Yoshiyuki Shimizu

Akihiro Nakamura

Takafumi Miyazaki

Mitsutaka Nakamura

Toshio Yamaki

Sei Onuma

Haruo Hashimoto

Munekazu Hirata

Kimihiro Tanaka

Shuji Kimura

Satoshi Fukui

Ichiro Sebata

Takashi Fujimoto

Koichi Matsuo

Tomohiko Fukawa

Hideyuki Masumoto

Tomohiro Nakajima

Kazuyuki Shimada

Kaoru Tada

Shinya Hasegawa

Masayuki Kato

Kohta Takenaka

Iwao Matsumae

Hiroyasu Murata

Noboru Kusunose

Toshitaka Aoki

Tatsuo Fukushima

Shunji Kitagawa

Hiroaki Kotabe

Kouji Yamanobe

Kouji Terasawa

Hiroshi Watanuk

Syunji Kitagawa

Isap Iwaguchi

An optical element includes: a first transmissive sectionthat causes light emitted from a light source to be incident on the optical element; a first reflection sectionwhich is located at a facing section facing the first transmissive section and from which light incident from the first transmissive section is reflected; a second reflection sectionwhich is located around the first transmissive section and from which the light reflected from the first reflection section is reflected; and a second transmissive sectionthat causes the light reflected from the second reflection section to be emitted out of the optical element in an optical axis direction of the light source.

Beam generation optical system and image capturing apparatus provided with the same

An imaging device includes: an image sensor that images an object to be imaged through polarizing plates arranged to have a different polarization direction for each pixel in a pixel group that includes a plurality of pixels corresponding to each of points of the object to be imaged; a pixel selecting unit that selects a pixel having a lowest brightness for each of the pixel group corresponding to each of the points; and an image output unit that outputs a captured image of the object to be imaged that is generated from pixels selected by the pixel selecting unit.

Imaging device and imaging method selecting a pixel having a lowest brightness

A sheet container, which is incorporated in an image forming apparatus, includes a container body having a loading face to load a sheet thereon, an extension unit disposed extendable in a sheet feeding direction with respect to the container body to extend the loading face, a length regulator disposed movable in the sheet feeding direction with respect to the extension unit to regulate a sheet trailing end position in the sheet feeding direction, and a sheet size indicator having a strip-shape provided on the container body along with a moving direction of the extension unit as a reference of a position of the length regulator, having at least one sheet size mark to indicate a size of the sheet, and being variable in length in a longitudinal direction with respect to the container body along with movement of the extension unit.

Sheet container and image forming apparatus incorporating same

A sheet feed tray to stack a sheet to be conveyed to an image forming apparatus includes a platen on which a first portion of the sheet is placed; a pair of first support portions to support a second portion of the sheet folded back upward at a trailing end of the first portion; and a pair of second support portions to support a third portion of the sheet folded back upward at a trailing end of the second portion. In the sheet feed tray, the first support portions and the second support portions are reciprocally movable toward each other, and a distance between the second support portions is wider than a distance between the first support portions.

Sheet feed tray, sheet feed device, and image forming apparatus

A power supply device to electroconductively connect a power-fed terminal included in a power-fed unit and a power supply terminal of a power supply board. The power supply device includes a unit contact portion to contact the power-fed terminal; a board contact portion to contact the power supply board; a connector to connect the unit contact portion and the board contact portion; and a support member to support the unit contact portion, the board contact portion, and the connector. The unit contact portion is held on an inner face of the support member opposed to the power-fed unit; the board contact portion is held on an outer face of the support member opposed to the power supply board; and the connector connects the unit contact portion and the board contact portion through the support member.

Power supply device and image forming apparatus

A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.

Moving device assembly and image forming apparatus including the moving device assembly

An image forming apparatus includes a pair of side walls disposed opposite each other; a driven unit supported between the side walls; a drive unit with drive transmission gears attached to one of the side walls and drives the driven unit; and a reinforcing member connecting the pair of side walls. One end of the reinforcing member is attached to the side wall opposite the other side wall to which the drive unit is attached and the other end is attached to the drive unit. The driven unit is an image forming unit including at least an image carrier. The image carrier includes a rotary shaft, both lateral ends of which are supported by the pair of side walls. A gear portion engaging the drive transmission gears of the drive unit is disposed on one end of the rotary shaft of the image carrier.

Image forming apparatus

An illumination optical system for an image pickup apparatus includes a plurality of light sources arranged in a circular loop pattern and a prism plate shaped like a circular loop. the prism plate includes a prism surface at which illumination light from the light sources enters and on which a plurality of prism columns arranged in a circular loop pattern in a circumference direction of the prism plate are formed and an outgoing surface from which the illumination light is emitted. the prism surface includes a flat portion on at least one of a peak formed by each of the plurality of prism columns and a trough formed between the plurality of prism columns. the flat portion is substantially parallel to a tangential direction of the prism plate.

Illumination optical system for image pickup apparatus

An optical scanning device includes a polygon scanner that deflects and scans light beams, a body on which the polygon scanner directly mounted, and a heat dissipating unit that dissipates heat of the deflection scanning unit. The heat dissipating unit is located at a position on an outer surface of the body corresponding to the deflection scanning unit. The body is provided with a pair of wall portions on the outer surface. The wall portions face each other with the heat dissipating unit between them, and extend in a direction in which air blown by an air blowing unit flows to form an air-flow path.

Optical scanning device and image forming apparatus

A liquid crystal panel includes an iris unit for limiting the incident range of light from an object to be shot, and a filter unit for assigning a exposure energy distribution varying with the position to incident light whose incident range is limited by the iris unit. The control unit controls the ON time and the OFF time of each pixel of the liquid crystal panel, and then a low pass filter operation on the captured image as an image processing can be optically replaced.

Imaging apparatus for reading information

An image forming apparatus includes a dual purpose tray that accommodates a document and a transfer sheet, a document transport mechanism to transport the document from the dual purpose tray to an image reading position, an image reading mechanism disposed beneath the document transport mechanism, an image forming mechanism disposed beneath the image reading mechanism, a transfer sheet transport mechanism to transport the transfer sheet from a bifurcation point through the image reading mechanism, a sheet feeding path that bifurcates into a first transport path through which the document is transported to the image reading position and a second transport path through which the transfer sheet is transported through the image reading mechanism to an image forming position by switching a switching member in accordance with one of a type of a recording medium set on the dual purpose tray and an operation mode of the image forming apparatus.

Image forming apparatus and control method therefor

A position Z of an image sensor is moved to an initial position A (image forming position) in a Z axis direction. An exposing operation is performed at a position A, and it is determined whether or not an exposing time counted by a timer has reached ta. If the exposing time has reached ta, an image sensoris moved to a position B. The exposing operation is performed at the position, and it is determined whether or not a total exposing time has reached ta+tb. If the total exposing time t has reached ta+tb, the image sensor is moved to a position C, and the exposing operation is performed at the position. Thus, the output distribution of the image sensor can be assigned a desired low pass filter characteristic.

The optical path of the light having spread at each point of an object to be shot is limited by an iris unit of a density filter. Since the density filter unit has a desired transmittance characteristic, the amount of the light passing through the density filter unit continuously changes from the center of the luminous flux toward the periphery. After the luminous flux forms an image on the image forming surface, it spreads toward the light-receptive surface of an image sensor, and becomes an image spreading on the light-receptive surface in a predetermined range.

An exposure unit which exposes photoconductive drums having rotary axes thereof arranged parallel to each other on a single plane by light beams, includes one or more polygon mirrors each having a plurality of reflection surfaces, where the one or more polygon mirrors rotate about a common rotary axis. Each light beam is deflected by the one or more polygon mirrors and scans the surface of a corresponding photoconductive drum. The common rotary axis is separated from the rotary axes of the photoconductive drums by identical distances along respective normals which are perpendicular to both the common rotary axis and the rotary axes of the photoconductive drums.

Exposure unit, image forming apparatus and image forming method

Growing community of inventors

Tokyo, Japan

Kozo Yamazaki