Canon Kabushiki Kaisha

Mitsuhiro Obara

Taku Murotani

Atsushi Sano

Junya Azami

Hiroki Katayama

Hisanori Kobayashi

Tetsushi Uneme

Jun Nagatoshi

Hiroyuki Fukuhara

Chihiro Shirakawa

Shin Komori

Go Araki

Takeyoshi Saiga

Yoji Misao

Tetsuya Nishiguchi

Isshin Sato

Tomoyuki Kawano

Kenji Shima

Kenta Yano

An image forming apparatus includes: a scanning unit configured to form latent images in a first region and in a second region of the photoreceptor; and a control unit configured to control a light emission luminance of the scanning unit. The control unit is further configured to set the light emission luminance of the scanning unit to a first light emission luminance when scanning of the first region is started, and set the light emission luminance of the scanning unit to a second light emission luminance higher than the first light emission luminance when scanning of the second region is started, and to decrease the light emission luminance of the scanning unit while the second region is being scanned, in a case where the second region is an upstream side of the first region in the scanning direction.

Image forming apparatus configured to form latent image for adhesion processing

An image forming apparatus includes: a scanning unit configured to form an electrostatic latent image on a photoconductor by scanning the photoconductor with one or more scanning beams in a main scanning direction based on an image signal, repetitively in a sub-scanning direction perpendicular to the main scanning direction; a generating unit configured to perform halftone processing on image data to generate the image signal; and a storage unit configured to store correction information. The correction information is set such that start positions of a plurality of scanning lines are linearly displaced to either a negative side or a positive side of the main scanning direction along the sub-scanning direction, in accordance with a direction of a first vector forming a smaller angle with the sub-scanning direction among two vectors in the halftone processing.

Image forming apparatus configured to perform halftone processing

A scanning optical device includes a deflector, a reflecting mirror, a housing to accommodate the deflector and the mirror; and an elastic member to urge the mirror toward the housing. The mirror includes a first surface urged by the elastic member, a second surface opposite to the first surface, a third surface and a fourth surface perpendicular to the first and second surfaces. The housing includes a bearing surface to support the second surface and a regulating portion to regulate movement of the mirror to a mirror widthwise direction, perpendicular to a mirror longitudinal direction and parallel with the second surface, and toward an opening of the housing. The regulating portion is provided opposite to only a part of the third surface so that a ridge line of the mirror between the second surface and the third surface does not contact the regulating member even an attitude of the mirror changes in a direction away from the bearing surface.

Scanning optical device and image forming apparatus with bearing surfaces and regulating portions constructed to reduce laser deviation of a reflection mirror

An image forming apparatus to form a toner image on a recording material includes a photosensitive member and an optical scanning unit. The optical scanning unit includes an optical scanning unit, an optical box, a cover member, and a moving unit movable to an outside of the image forming apparatus. The optical scanning unit and the moving unit are arranged so that the moving unit and the optical scanning unit are opposed to each other when the moving unit is located in an inside of the image forming apparatus. The optical scanning unit is disposed so as to allow a user to touch the optical scanning unit through a space generated in the inside of the image forming apparatus when the moving unit is moved to the outside of the image forming apparatus. Between the optical box and the cover member, the cover member is opposed to the moving unit.

Image forming apparatus

An image forming apparatus is provided which forms an image on a recording medium. The image forming apparatus includes a housing; a plurality of photosensitive members which bear respective toner images; a scanning unit which scans surfaces of the plurality of photosensitive members by laser light in accordance with image information; and a recording medium container which contains the recording medium and is detachably mounted in the housing. The scanning unit is disposed under the plurality of photosensitive members and over the recording medium container in the vertical direction, and other components are not interposed between the scanning unit and the recording medium container in the vertical direction.

Image forming apparatus with reduced height

An optical scanning apparatus includes a first light source, a second light source, a first driving element, a second driving element, a rotatable polygonal mirror, a first scanning optical portion, a second scanning optical portion, a detecting element, and a circuit board. The first light source, the first driving element and the detecting element are arranged in a named order on the circuit board. The following relationship is satisfied: &#x3b8;1&#x3e;&#x3b8;2, where &#x3b8;1 is an angle formed by a direction of the first laser light and a first direction, and &#x3b8;2 is an angle formed by a direction of the second laser light and a second direction.

Optical scanning apparatus and image forming apparatus

A spectral color measuring apparatus includes a light source, an optical emitting element configured to regulate a position of the light source in an emission direction of a light flux, and to guide the light flux emitted from the light source onto a color-patch image formed on a surface of a sheet, and an urging member configured to urge the light source toward the optical emitting element in the emission direction of the light flux. With this, relative positional accuracy between the light source and the optical emitting member is enhanced, thereby enabling accurate measurement of a color of an image in a short color measuring takt (time period).

Color measuring apparatus and image forming apparatus

A light source device includes a semiconductor laser configured to emit a laser beam, the semiconductor laser including a stem provided with a cut-away portion; and a holder member including a cylindrical portion configured to hold the semiconductor laser, wherein an inner surface of the cylindrical portion has a surface opposing the stem, and wherein the opposing surface includes a contact portion disposed at a position corresponding to the cut-away portion and contacting the stem and a spaced portion spaced from the stem.

Light source device, optical scanning apparatus, and image forming apparatus

The present invention roughens at least a partial region of an outer planar surface of at least one of an optical case and a lid of a laser scanner; thus, electrification of the optical case to be caused by friction with another member or a person is reduced, and damage to an electronic component is prevented.

Optical scanning device

Six first holes into which lead pins of a first semiconductor laser are inserted are arranged to form a parallelogram having line segments each connecting two first holes arranged in an X direction as first short sides, and line segments each connecting three first holes arranged in an intersecting direction intersecting with the X direction as first long sides. Six second holes into which lead pins of a second semiconductor laser are inserted are arranged to form a parallelogram having line segments each connecting two second holes arranged in the X direction as second short sides, and line segments each connecting three second holes arranged in the intersecting direction intersecting with the X direction as second long sides.

Optical scanning device, image forming apparatus, and method for assembling optical scanning device

A spectral colorimetric apparatus includes a housing which includes a side wall. An outer surface of the side wall is an adjustment surface capable of adjusting a position of a linear sensor by moving while attaching the linear sensor to the adjustment surface. The linear sensor is supported by the side wall of the housing while abutting on the adjustment surface and receives alight beam that is dispersed by a concave surface reflection type diffraction element and passes through an opening portion. The adjustment surface is parallel to a tangential line at a part of a Rowland circle of the concave surface reflection type diffraction element, through which a light beam received by the linear sensor passes.

Spectral colorimetric apparatus and image forming apparatus including the same

The optical scanning apparatus including a light source unit having plurality laser light sources for emitting laser light and one lens in which the laser light emitted from the plurality laser light sources is transmitted, a deflect device that deflects and scans the laser light on an image bearing member, an optical member that images the laser light on the image bearing member, a housing that internally includes the deflect device and the optical member, the housing forms an opening portion that passes through the laser light emitted from the plurality of the laser light sources, and an elastic member that blocks a gap between the lens and the opening portion, the elastic member being pinched between the lens and the housing. It achieves sealing of the flow-in path and sealing of the gap between the light source unit and the housing with a simple configuration.

Optical scanning apparatus

During one cycle of reciprocating operation of a MEMS mirror, a light receiving sensor detects a falling time at which a laser beam reflected by an upstream-of-sensor mirror and scanned in one direction passes an edge of a regulation portion, and a rising time at which the laser beam scanned in the other opposed direction passes the edge of the regulation portion. A controller executes an arithmetic operation on the basis of the two times detected by the light receiving sensor and controls the operation of the MEMS mirror, which is performed by the driver, such that the detected two times are held at respective setting times.

Growing community of inventors

Suntou-gun, Japan

Mitsuhiro Obara