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Exposure

Subclass of:

399 - Electrophotography

399130000 - IMAGE FORMATION

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
399220000 Light source 89
399218000 Lens 13
399206000 Slit exposure 7
399196000 Variable magnification 3
20090279920OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning device includes a synchronism detecting element for detecting a light beam scanningly deflected by a deflecting surface of an optical deflector, to determine an image-writing start position of the light beam on a scan surface in a main-scan direction, and a synchronism detecting optical element for directing the light beam scanningly deflected by the optical deflector to the synchronism detecting element, wherein the synchronism detecting optical element is comprised of a prism having a plurality of reflecting surfaces being unified and having a power in a sub-scan direction, and wherein, in a sub-scan section, the prism is configured to place the deflecting surface of the optical deflector and a light-receiving surface of the synchronism detecting element in an optically conjugate relationship with each other.11-12-2009
20100129116Light projecting device, image reading device including same, and image forming apparatus including the image reading device - A light projecting device includes a base board, a light guiding member, a holding member, a cover, and a positioning member. A plurality of light-emitting elements are arranged in a line on the base board in a main scan direction. The light guiding member faces a radiation surface of the light-emitting elements and guides light projected from the light-emitting elements to an irradiation region of an illuminated object. The holding member holds the base board. The cover covers the base board and the light guiding member. The positioning member positions the light guiding member on the holding member. The holding member and the cover sandwich the light guiding member positioned by the positioning member. The light projecting device includes the holding member, the light guiding member, the base board, and the cover as a single unit which is detachably mountable relative to a chassis of the light projecting device.05-27-2010
20110002712Optical scanning apparatus and image forming apparatus using the same - Provided is an optical scanning apparatus has a plurality of light emitting portions and an incident optical system including optical element, wherein each shape of optical surfaces in a main scanning section of optical elements is formed into a noncircular shape. When defining that W is a space between specific light emitting portions farthest from an optical axis in the main scanning direction, La is an optical path length between an aperture stop and a specific optical surface closest to the light source unit among the noncircular optical surfaces of the incident optical system, f01-06-2011
399205000 Having reference position (relative positioning) 2
20100150611Image forming apparatus - An image forming apparatus having removable/replaceable process cartridges is provided. One of the removable/replaceable process cartridges may be removed/replaced from a panel which is different than a panel from which the other removable/replaceable process cartridges may be removed/replaced. One of the removable/replaceable process cartridges may be associated with an exposure device which is only used to expose a portion of that process cartridge while the other removable/replaceable process cartridges may be associated with at least one other exposure device. An image forming apparatus may include two or more different types of exposure devices (e.g., laser based, light emitting diode based, etc.). An image forming apparatus may include a plurality of guide members for guiding portions of an exposure device arranged on a panel of the image forming apparatus such that when the door or panel is arranged on the image forming apparatus, the exposure device is guided into position by the guide members.06-17-2010
20100054813Image Forming Apparatus - An image forming apparatus includes a photoconductive body on which an electrostatic latent image is formed, an exposure unit which exposes the photoconductive body, a first pressing member which presses the exposure unit toward the photoconductive body, a first positioning member which makes a contact with the exposure unit, a second positioning member which is arranged at a side nearer to the photoconductive body than the first positioning member in an optical axial direction of light, and a second pressing member which presses the exposure unit toward the second positioning member. A point of action at which the first pressing member presses the exposure unit is positioned at a side nearer to the photoconductive body, than the first positioning member in the optical axial direction. It is possible to suppress a degradation of an image quality by suppressing an effect of vibrations with respect to the exposure unit.03-04-2010
399182000 Having image editing 2
20080317504IMAGE FORMING APPARATUS - An image forming apparatus which has a plurality of image forming stations arranged in parallel, each of the image forming stations having a photosensitive drum, and which forms a desired image by combining toner images formed on the photosensitive drums. A laser scanning optical system deflects and scans a plurality of laser beams concurrently with a single polygon mirror to irradiate the photosensitive drums. In a monochromatic mode, the rotation speed of the photosensitive drum for forming a black image is changed higher, and synchronization of writing in a main scanning direction is performed by using one of the laser beams irradiating the other photosensitive drums of which rotation speeds are not changed.12-25-2008
20090016773IMAGE-FORMING APPARATUS AND IMAGE-FORMING METHOD - An image-forming apparatus, comprising:01-15-2009
399217000 Full frame exposure (entire original at once) 1
20090274488Image Forming Device - An image forming device includes a photoconductive body, an exposure unit configured with a plurality of light emitting elements aligned in a predetermined direction, the exposure unit being adopted to expose the photoconductive body to light emitted by the light emitting elements, a frame configured to support both sides of the exposure unit in the predetermined direction, the frame having a reference portion configured to position the exposure unit in the predetermined direction in contact with an end of the exposure unit in the predetermined direction, and a pressing member provided to one of the frame and the exposure unit, the pressing member being configured to press the end of the exposure unit against the reference portion.11-05-2009
399203000 Selective or convertible 1
20080286009Light Scanning Apparatus, Image Forming Apparatus Equipped With Such Light Scanning Apparatus, and Control Method or Image Forming Method For Such Image Forming Apparatus - An image forming apparatus, includes: a latent image carrier whose surface includes an effective image region spanning across a predetermined width in a main scanning direction and is driven in a sub scanning direction approximately orthogonal to the main scanning direction; a latent image former which has a light source and a deflection mirror oscillating, and deflects a light beam from the light source using the deflection mirror so as to scan the effective image region with the deflected light beam; and a scanning mode controller which switches selectively between a single-side scanning mode and a double-side scanning mode, the single-side scanning mode being a mode in which the light beam is scanned only in a first direction included in the main scanning direction, the double-side scanning mode being a mode in which the light beam is scanned in both the first direction and a second direction opposite to the first direction, wherein a condition to form latent images on the latent image carrier in the single-side scanning mode is different from a condition to form latent images on the latent image carrier in the double-side scanning mode.11-20-2008
Entries
DocumentTitleDate
20090154958EXPOSURE APPARATUS - An exposure apparatus for curing UV curable adhesive applied to an optical module includes a UV light source, a UV blocking member and a conveyer device. The UV light source emits UV light. The UV blocking member forming a UV light-tight region with the UV light source received therein. The conveyer for conveying the optical module through UV light-tight region to cure the UV curable adhesive by exposure to the UV light.06-18-2009
20100028047ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - The present invention provides an image forming apparatus provided with the highly sensitive electrophotographic photoreceptor comprising an enamine compound as a charge transport substance having a specific enamine structure; and provided with the semiconductor laser oscillating the laser beam with the oscillation wavelengths of from 390 nm to 500 nm inclusive in order to form an image having a high resolution for a long period of time.02-04-2010
20120237262HEAT RADIATING DEVICE, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS - A heat radiating device includes a base on which a heat generating member is mounted and a plurality of heat radiating members that integrally extend from a bottom face of the base. In this heat radiating device, the heat radiating members are each formed to have a circular transverse section, and are arranged such that any one of the heat radiating members is positioned on a straight line in any direction orthogonal to a direction in which the heat radiating members extend.09-20-2012
20080219704Optical writing device and image forming apparatus - An electrophotographic optical writing device equipped with a semiconductor laser includes the semiconductor laser, a collimating lens, an aperture, a cylindrical lens, and a polygon scanner. An additional aperture, a second aperture, is provided in a light path between the semiconductor laser and the collimating lens.09-11-2008
20100124437Image Forming Apparatus and Image Forming Method - An image forming apparatus includes: a latent image bearing member; an exposure head having an imaging optical system and N light-emitting elements (where N is an integer) disposed in a first direction that emit light forming an image upon the latent image bearing member through the imaging optical system; an FM screen whose unit of processing is M in the first direction, M being greater than N; and a controller that performs a screening process on image data using the FM screen.05-20-2010
20090103947Exposure Head, An Image Forming Apparatus and An Image Forming Method - An image forming apparatus, includes: a latent image carrier that moves in a moving direction; and an exposure head that includes a light emitting element which emits a light and an imaging optical system which images the light emitted from the light emitting element, and is adapted to form a spot on the latent image carrier, wherein a pitch in the moving direction of the latent image carrier between the spots formed by the different imaging optical systems is an integral multiple of a pixel pitch in the moving direction of the latent image carrier.04-23-2009
20090103946IMAGE FORMING APPARATUS - An image forming apparatus comprises: a holding unit that holds a medium on which an image is formed by irradiation of image-bearing light, the medium having a liquid crystal layer, a photoconductor layer that changes a resistance in response to irradiation of light, and a pair of electrode layers provided in an opposing relation so as to sandwich the liquid crystal layer and photoconductor layer, with at least one of the pair of electrode layers being divided into stripe-shaped sub-electrode layers; an irradiating unit that irradiates the medium with image-bearing light linearly along a longitudinal direction of the sub-electrode layers; a transporting unit that transports the irradiating unit along the surface of the medium in a first or second direction; a power supply unit that applies a voltage between the sub-electrode layer and the electrode layer; and an optical shielding unit that shields the photoconductor layer.04-23-2009
20120294652SURFACE EMITTING LASER DIODE, OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - A surface emitting laser diode comprises a substrate, a lower reflector formed over the substrate, an active layer formed over the lower reflector, an upper reflector formed over the active layer, a current restrict structure including a current confinement region surrounded by insulation region. The current restrict structure is disposed in an upper reflector or between an active layer and the upper reflector, and an upper electrode formed over the upper reflector includes an aperture which corresponds to an emission region from which light is emitted in a first direction perpendicular to a surface of a substrate. The emission region and the current restrict structure including the current confinement region are selectively configured to obtain high single transverse mode, stabilized polarization direction, isotropic beam cross section and small divergence angle, while allowing the device to he manufactured with high yield rate.11-22-2012
20120269551OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING OPTICAL SCANNING APPARATUS - At the time of forming an image, a rise in a temperature of a drive motor generates distortion in a bottom of a optical box of an optical scanning apparatus. If an opening is formed on the optical box to release heat, the optical box becomes easily distorted. To solve such a problem, according to the present invention, the optical scanning apparatus includes a rib which crosses over the opening formed at the bottom of the optical box.10-25-2012
20080304867Image bearing member, method of manufacturing the same, image formation method, image forming apparatus and process cartridge - An image bearing member including an electroconductive substrate, a photosensitive layer located overlying the electroconductive substrate and a cross linking surface layer comprising a charge transport curing compound and located overlying the photosensitive layer, wherein the charge transport curing compound includes a material including a structure unit represented by the following Chemical formula A:12-11-2008
20080267662LIGHT SCANNING DEVICE AND IMAGE FORMING APPARATUS - A light scanning device, which scans a surface to be scanned in a main scanning direction by a plurality of light beams, includes a light source including a plurality of light emitting parts that are arrayed two-dimensionally to emit the light beams, a separation optical system that separates a portion of the light beams emitted respectively from the plurality of light emitting parts, and a light receiving element that receives the portion of the light beams separated by the separation optical system. The separation optical system is a reduction system.10-30-2008
20080267663OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - An optical scanning device which scans a scanned surface by a plurality of light beams in a main-scanning direction includes a light source having a plurality of light-emitting portions which emit the light beams, the light-emitting portions being two-dimensionally arranged in a plane parallel to the main-scanning direction and a sub-scanning direction orthogonal to the main-scanning direction via arrangement intervals in the main-scanning direction and the sub-scanning direction, a deflector which scans the light beams in the main-scanning direction; and a scanning optical system which images the scanned light beams onto the scanned surface.10-30-2008
20090080938Exposure device and image forming apparatus - An exposure device includes a substrate on which a light emitting element array is provided, a focusing lens that focuses light emitted by the light emitting element array, a supporting member that supports the substrate and the focusing lens. The supporting member has a contact surface. A base is provided for forcing the substrate against the contact surface of the supporting member. The base has a first engaging portion that engages a second engaging portion formed on an inner wall of the supporting member. The base is mounted to the supporting member by the engagement of the first engaging portion and the second engaging portion.03-26-2009
20130216267REFLECTIVE OPTICAL SENSOR AND IMAGE FORMING APPARATUS - A reflective optical sensor includes at least three light-emitting elements; a lighting optical system that guides light emitted from the light-emitting elements to a toner pattern; and at least three light-receiving elements that receive the beams of light reflected by the toner pattern. The lighting optical system has a lateral magnification m that satisfies m≦P/S, where S is the size of the light-emitting elements and P is the arrangement pitch of the light-emitting elements.08-22-2013
20110229205OPTICAL ELEMENT USED IN OPTICAL SCANNING APPARATUS AND OPTICAL SCANNING APPARATUS USING SAME - An optical element used in an optical scanning apparatus includes a diffracting surface composed of a diffraction grating. The diffracting surface includes a diffraction grating having a sectional shape linearly formed. If diffraction power in a main scanning direction on the diffracting surface received by an axial light flux is φDO and refractive power in the main scanning direction on a refracting surface on which the diffraction grating is formed received by the axial light flux is φref, the optical element satisfies the following conditions:09-22-2011
20090116875Image Forming Apparatus - An image forming apparatus includes: a photosensitive body which is moved in a movement direction; an exposing unit which exposes the photosensitive body, and which includes a guide roller configured to contact with the photosensitive body and rotate with a movement of the photosensitive body and configured to regulate a positional relationship with the photosensitive body, the guider roller being disposed such that a rotation direction of the guide roller is inclined with respect to the movement direction so as to generate a force for urging the exposing unit to one end thereof in an orthogonal direction when the guide roller rotates, the orthogonal direction being orthogonal to the movement direction and to an optical axis direction of a light emitted from the exposing unit; and a regulating member configured to contact with the one end of the exposing unit to regulate a position of the exposing unit.05-07-2009
20080292359Image Forming Device - An image forming device includes an exposure unit having an exposure surface, an opposed surface facing the exposure surface, a first side surface connecting the exposure surface with the opposed surface, and a second side surface facing the first side surface, a positioning mechanism positioning the exposure unit with respect to a photoconductive body, the positioning mechanism including a first contact member contacting the exposure unit in a first contact point at a side of the first side surface, a second contact member contacting the exposure unit in a second contact point at the side of the first side surface, and a third contact member contacting the exposure unit in a third contact point at a side of the second side surface, the third contact point being located between the first contact point and the second contact point in a predetermined direction from the exposure surface toward the opposed surface.11-27-2008
20110116837OPTICAL SCANNING APPARATUS - An optical scanning apparatus includes a first optical member for receiving a plurality of light beams with an interval and for causing a first group of beams to emerge with a narrower interval, the first optical member being rotatable to adjust the interval of the beams emergent therefrom; a second optical member for receiving a second light beam and the first group of beams emergent from the first optical member with an interval and for causing a third group of beams to emerge with a narrower interval, the second optical member being rotatable to change the interval between the first group of beams and the second beam; and deflecting means for scanningly deflecting a third group of beams emergent from the second optical member.05-19-2011
20110211869MANUFACTURING METHOD, SURFACE-EMITTING LASER DEVICE, SURFACE-EMITTING LASER ARRAY, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS - A manufacturing method for manufacturing a surface-emitting laser device includes the steps of forming a laminated body in which a lower reflecting mirror, a resonator structure including an active layer, and an upper reflecting layer having a selective oxidized layer are laminated on a substrate; etching the laminated body to form a mesa structure having the selective oxidized layer exposed at side surfaces thereof; selectively oxidizing the selective oxidized layer from the side surfaces of the mesa structure to form a constriction structure in which a current passing region is surrounded by an oxide; forming a separating groove at a position away from the mesa structure; passivating an outermost front surface of at least a part of the laminated body exposed when the separating groove is formed; and coating a passivated part with a dielectric body.09-01-2011
20100054812Exposing Device, Method of Manufacturing the Same, and Image Forming Apparatus - There is provided an exposing device which includes an elongated optical head in which a plurality of light emitting portions are arranged, and a supporting member to which the optical head is adhered. The optical head and the supporting member are adhered by a first adhesive, and a second adhesive of which a modulus of elasticity after curing is lower than that of the first adhesive. The second adhesive is applied in a second adhesive area which is located at a boundary between the optical head and the supporting member and which is longer, in a longitudinal direction of the optical head, than a first adhesive area which is located at the boundary and to which the first adhesive is applied.03-04-2010
20090022520Optical writing device and image forming apparatus - An optical writing device that writes electrostatic latent images on an image carrier by irradiating and scanning the image carrier with an optical beam includes an optical element, a support housing configured to support members constituting the optical writing device, a pair of optical-element holding members opposing each other in a principal scanning direction and arranged in the support housing, and a displacing member configured to displace at least one of the pair of optical-element holding members relatively to the support housing on a plane perpendicular to the principal scanning direction. The optical-element holding member is made of a material having a coefficient of linear expansion smaller than that of the support housing.01-22-2009
20080205934OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS - A rotating deflection unit deflects a laser light emitted from a light-emitting element and performs a scanning with the laser light. A light-intensity detecting unit detects a light intensity of the laser light. A current control unit controls a current to be supplied to the light-emitting element so that the light intensity of the laser light reaches a target light intensity. An initializing unit determines an initial current value with which the target light intensity is obtained from the light-emitting element by eliminating an influence of a noise caused by a reflected light input into the light-intensity detecting unit from the rotating deflection unit.08-28-2008
20110076058SURFACE EMITTING LASER MANUFACTURING METHOD, SURFACE EMITTING LASER ARRAY MANUFACTURING METHOD, SURFACE EMITTING LASER, SURFACE EMITTING LASER ARRAY, AND OPTICAL APPARATUS INCLUDING SURFACE EMITTING LASER ARRAY - Provided is a surface emitting laser manufacturing method, etc., which reduces process damage occurring to a surface relief structure, enabling stable provision of a single transverse mode characteristic. Provided is a method including a surface relief structure for controlling a reflectance in a light emitting portion of an upper mirror, the surface relief structure including a stepped structure, includes: forming a resist pattern including a pattern for forming a mesa structure and a pattern for forming a stepped structure, on or above the upper mirror, and performing first-phase etching for etching the surface layer of the upper mirror to determine the horizontal position of the stepped structure; forming a current confining structure after the performing first-phase etching; and performing second-phase etching for further etching the area that the first-phase etching has been performed, to determine the depth position of the stepped structure, after the forming a current confining structure.03-31-2011
20100196052OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - An optical scanning apparatus includes an optical deflector that deflects a light beam at a substantially constant angular velocity and an optical system that condenses the deflected light beam onto a to-be-scanned surface thereby performing optical scanning of the to-be-scanned surface. The to-be-scanned surface is a surface of a latent image carrier having a charge generation layer that generates carriers and a charge transport layer. A driving unit drives the optical deflector at a scanning frequency at which exposure is attained in a state where the carriers generated at the charge generation layer of the latent image carrier substantially stay still.08-05-2010
20100028048OPTICAL SCANNING APPARATUS AND IMAGE-FORMING APPARATUS USING THE SAME - At least one exemplary embodiment is directed to an optical scanning apparatus which includes a Vertical Cavity Surface Emitting Laser including a plurality of light-emitting portions that are spaced from each other in at least a sub-scanning direction, a first optical system including a light-condensing element that converts each of light beams from the laser into a light beam in another state; a deflector that reflects and deflects the light beams from the first optical system, and a second optical system that focuses the light beams deflected by the deflecting member on a surface to be scanned, where the second optical system includes at least an imaging optical element having an optical surface with a non-arc shape in a sub-scanning cross section.02-04-2010
20090169260Image Forming Apparatus - An image forming apparatus is provided. The image forming apparatus includes: a photosensitive member; an exposing unit which is opposed to the photosensitive member, and which includes a plurality of light emitting elements arranged in an arrangement direction to expose the photosensitive member; and a body frame which is provided at both sides of the exposing unit in the arrangement direction. The body frame is made of a conductive member. The exposing unit includes an exposing unit body having an exterior made of a resin; and an electrically conductive holding member which is longer than the exposing unit body in the arrangement direction, and which holds the exposing unit body, wherein the holding member is electrically connected to the body frame to be grounded.07-02-2009
20120237261SURFACE EMITTING LASER AND IMAGE FORMING APPARATUS - A surface emitting laser includes a stepped structure having a step between a first region and a second region, the stepped structure provided in an emission area located in an upper portion of the upper mirror. The surface emitting laser includes a light shielding member provided in a third region between the first region and the second region. The light shielding member is not provided in a portion of the first region and a portion of the second region.09-20-2012
20120177409OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - Each scanning optical system includes a first scanning lens and a second scanning lens through which a light beam is incident onto the first scanning lens. The second scanning lens of each scanning optical system is disposed at the optically most downstream side in the scanning optical system and has an optical plane that has the strongest power in a sub-scanning corresponding direction. In addition, the optical plane of each second scanning lens, which has the strongest power in the sub-scanning corresponding direction, is located under the shaft bearings of neighboring polygon mirrors in the vertical direction.07-12-2012
20120251181DRIVER APPARATUS, PRINT HEAD AND IMAGE FORMING APPARATUS - A driver apparatus drives aligned light emitting thyristors. Each thyristor includes an anode, a cathode, and a gate. The driver apparatus includes a common terminal, a first resistor, a second resistor, and a switch. Each thyristor is disposed at a first position where the anode is connected to the first potential and the cathode is connected to the common terminal, or a second position where the anode is connected to the common terminal and the cathode is connected to the second potential. The first resistor is connected between the first potential and the common terminal. The second resistor is connected between the common terminal and the second potential. The switch is connected at a third position where the switch is connected between the between the first potential and the common terminal, or a fourth position where the switch is connected between the common terminal and the second potential.10-04-2012
20120082483OPTICAL SCANNING APPARATUS - An optical scanning apparatus including a deflection unit configured to deflect a light beam emitted from a light source so that the light beam scans on a photosensitive member, a casing which is configured to house the light source and the deflection unit inside the casing and which is provided with an aperture that transmits the light beam deflected by the deflection unit out from the casing, a first light transmission member provided on the aperture for dust-proofing an interior of the casing, which is configured to transmit the light beam incident on the aperture, and a support member configured to support a second light transmission member for transmitting a light beam that has been transmitted through the first light transmission member and dust-proofing the first light transmission member, wherein the second light transmission member is detachable from the support member.04-05-2012
20120263500TRANSFER DEVICE AND IMAGE FORMATION APPARATUS - In order to provide a device that can suppress speed fluctuations of an image carrier and prevent image disturbance caused thereby, tension rollers elastically supported by springs are disposed either side of a secondary transfer position where an intermediate transfer belt and a secondary transfer roller oppose one another, the secondary transfer roller having a recess part for accommodating a gripping part for gripping a recording material. The intermediate transfer belt is rotatably driven by a belt drive motor around which the intermediate transfer belt is wound in a position that is different from the secondary transfer backup roller. The speed fluctuations of the intermediate transfer belt that are generated in the secondary transfer position due to the rotation of the secondary transfer roller are absorbed by the two tension rollers and have no effect on image formation.10-18-2012
20120263501HOUSING IMMOBILIZING MECHANISM, IMAGE FORMING APPARATUS, AND HOUSING IMMOBILIZING METHOD - A housing immobilizing mechanism has a drive source that drives at a predetermined speed; a housing for holding the drive source; a number of fasteners greater than a number of predetermined fastening sites on the housing; and an immobilizing member attached to a plurality of the fasteners, the immobilizing member adapted to immobilize the housing. The immobilizing member is attached to a combination of fasteners to which the immobilizing member is attached that is not a combination in which an amplitude of vibration relative to a drive speed of the drive source is greatest, there being at least one fastener to which an immobilizing member is not attached.10-18-2012
20120269552IMAGE FORMING APPARATUS - An image forming apparatus including: a photosensitive member; an exposure device including light emitting elements arrayed along a longitudinal direction of the photosensitive member to expose with light different positions of the photosensitive member; first positioning members configured to position the exposure device relative to the photosensitive member at both longitudinal end portions of the exposure device; a first elastic member which urges the exposure device toward the photosensitive member to maintain a positioned state of the first positioning members; a holding member which holds the exposure device at a mounting portion between the first positioning members; a second positioning member configured to position the holding member relative to the photosensitive member to position the exposure device relative to the photosensitive member at the mounting portion; and a second elastic member which urges the holding member toward the photosensitive member to maintain a positioned state of the second positioning member.10-25-2012
20110236073IMAGE FORMING DEVICE - An image forming device that includes a plurality of exposure components and a conductive covering member is provided. Pluralities of light emitting elements are disposed on substrates at the plurality of exposure components. The exposure components expose a plurality of exposure objects, respectively. The conductive covering member includes at least a floor plate that covers the exposure components from below. Wiring is connected to the substrates being disposed along the floor plate. Earthing portions of the substrates are electrically connected to the floor plate. The covering member includes a side plate that covers an axial direction side of the exposure objects and is joined to the floor plate. The earthing portions of the substrates are electrically connected to the side plate via conductive members.09-29-2011
20100232835Optical scanning unit and electro-photographic image forming apparatus including the same - An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is φr, the power of the diffraction unit is φd, and the ratio φr/φd is such that 0.5<φr/φd<1.3.09-16-2010
20110158694OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - The present invention is an optical scanning apparatus that is positioned and fixed to a metal frame of an image forming apparatus, in which a rotating polygon mirror being a deflection means and a drive motor rotationally driving the rotating polygon mirror are accommodated inside a housing made of resin. In the present invention, a bearing of the drive motor and a positioning member provided upright to the metal frame are inserted into and fitted with each other from opposite directions in a positioning boss formed in the housing, and the bearing is in contact with the positioning member.06-30-2011
20080232855EXPOSURE APPARATUS, IMAGE FORMING APPARATUS, EXPOSURE APPARATUS MANUFACTURING METHOD AND IMAGE FORMING METHOD - The exposure apparatus is provided with: an optical member; and a holding member that holds the optical member. Both end portions of the optical member are held by the holding member with a first adhering unit that is cured by light irradiation for first duration and a second adhering unit that is cured by light irradiation for second duration which is longer than the first duration.09-25-2008
20080226347Electronic apparatus and image forming apparatus - An electronic apparatus includes a main body; a maintenance member operated by an operator for maintenance; and a hand touch member disposed on the maintenance member. The hand touch member is formed of a conductive material, and is connected to a ground portion disposed in the main body.09-18-2008
20080226346Inkjet Solid Imaging System and Method for Solid Imaging - Solid imaging apparatus and methods for use are disclosed that reduce the amount of uncured solid imaging build material remaining on a completed build object following the completion of the solid imaging build process. The amount of uncured build material is reduced through the use of either an uncoating web that removes excess build material from the build object during the course of the building process or an ink jet source of build material that uses only as much build material as is necessary for the fabrication of the build part. Also disclosed is an imager assembly for use with such a solid imaging apparatus that incorporates two or more individual imagers in an array and accounts for variations in the intensity and alignment of adjacent imagers. The apparatus can be modified for semi-continuous operation and for integrating into a manufacturing operation, if desired.09-18-2008
20120251182OPTICAL DEVICE CAPABLE OF MINIMIZING OUTPUT VARIATION DUE TO FEEDBACK LIGHT, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS - An optical device includes a surface-emitting laser array having a plurality of light-emitting portions; a package member on which the surface-emitting laser array is disposed; and a transparent member retained on the package member and disposed on an optical path of a light beam emitted by the surface-emitting laser array. The transparent member includes an incident plane on which the light beam emitted by the surface-emitting laser array is incident. The incident plane is inclined with respect to an emitting surface of the surface-emitting laser array at a first inclination angle which is smaller than a second inclination angle at which the light emitted by one of the light-emitting portions is incident on another, most-distant one, of the light-emitting portions via reflection by the transparent member.10-04-2012
20110262184Driver circuit, print head, and image forming apparatus - A driver apparatus drives a plurality of light emitting thyristors. Each thyristor includes a cathode connected to the ground, an anode, and a gate. A gate driver circuit outputs a drive signal that electrically drives the gate. A level shifter circuit includes an input terminal connected to the driver circuit and an output terminal connected to the gate of the thyristor. The level shifter circuit operates such that the drive signal is shifted down in signal level and is outputted to the output terminal and a signal at the gate inputted to the output terminal is shifted down in signal level and is outputted to the input terminal. In response to the drive signal outputted from the driver circuit, a current supplying circuit supplies drive current to the anode of the thyristor such that the drive current flows from the anode to the cathode.10-27-2011
20110229206OPTICAL SCANNER USED IN COLOR IMAGE-FORMING DEVICE - An optical scanner used for an image-forming device to form a color image includes a plurality of photosensitive drums for superimposing a developer image formed on each of the plurality of photosensitive drums. The optical scanner includes a casing, a plurality of light sources, a deflector, an optical system, and a storage device. The plurality of light sources is provided in a one-to-one correspondence with the plurality of photosensitive drums. Each of the plurality of light source emits a laser beam. The deflector is provided in the casing for deflecting the laser beam. The optical system is provided in the casing for guiding the deflected laser beam to a corresponding one of the plurality of photosensitive drums to make the laser beam scan the corresponding one of the plurality of photosensitive drums. The storage device stores a characteristic related to the laser beam scanning the corresponding one of the photosensitive drums.09-22-2011
20130188992OPTICAL DEFLECTOR, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS - An optical deflector including a rotary member supported by a bearing shaft and rotatively driven by a motor for deflecting a plurality of laser beams separated from each other in a rotational axis direction of the rotary member is disclosed. The optical deflector includes a polygon mirror having four sides arranged about the rotational axis direction. Each of the four sides is a continuous plane having a plurality of effective reflection areas separated from each other in the rotational axis direction.07-25-2013
20120063811RESIN CASTING MOLD, MOLDED RESIN PRODUCT, OPTICAL ELEMENT, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS - A resin casting mold includes a mold member forming a cavity that includes first and second surfaces facing each other in a first direction. The mold member further includes an insert member which forms a part of a third surface and which is slidable in a second direction perpendicular to the first direction. At least one cross-sectional shape of the cavity satisfies h03-15-2012

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