Class / Patent application number | Description | Number of patent applications / Date published |
399151000 | Combined with scanning | 36 |
20080205933 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD AND IMAGE FORMING SYSTEM - An image forming apparatus includes a communicating unit ( | 08-28-2008 |
20080273896 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A light source emits a light beam for forming an electrostatic latent image on a plurality of image carriers charged by a charging unit. A polygon mirror deflects the light beam from the light source in a main scanning direction. A developing unit develops the electrostatic latent image formed on the image carriers with a developer to obtain a visible image. A fixing unit fixes the visible image transferred onto the recording medium by a transfer unit. The polygon mirror includes four reflection planes with different tilt angles with respect to a rotation axis of the polygon mirror. The control unit includes a correction unit that performs an fθ correction. | 11-06-2008 |
20080298839 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning device configured to remove or sufficiently reduce ghost light includes an input optical system for directing a light beam from a light source to a deflecting surface of a deflector, and an imaging optical system for imaging a light beam scanningly deflected by the deflecting surface upon a surface to be scanned, wherein, in a sub-scan section, the light beam is incident on the deflecting surface of the deflector from an oblique direction with respect to an optical axis of the imaging optical system, wherein a light blocking member for blocking ghost light is disposed on a light path between the deflecting surface and the scanned surface, wherein an end portion of the light blocking member in the sub-scan direction is formed with a curved shape having a height in the sub-scan direction which height changes in accordance with the position in the main-scan direction. | 12-04-2008 |
20080304863 | OPTICAL 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. | 12-11-2008 |
20090022518 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A compact optical scanning apparatus capable of desirably correcting an f characteristic, a field curvature, and other aberrations, and an image forming apparatus using the same, which includes an incident optical system (LA) for guiding a beam from a light source ( | 01-22-2009 |
20090028603 | BEAM DEFLECTOR, LIGHT SCANNING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - A beam deflector having a base, the beam deflector including a polygon mirror to reflect a light beam, a mirror driving unit including a rotor shaft erected from the base and a rotor to support the polygon mirror and to rotate about the rotor shaft, a friction member to contact with and be separated from the rotor so as to obstruct and release rotation of the rotor, respectively, and a friction member driving unit to drive the friction member. | 01-29-2009 |
20090060575 | IMAGE FORMING APPARATUS - An image forming apparatus is described. The image forming apparatus may include a first casing and a second casing above the first casing. The second casing is provided with an upper surface including a generally horizontal surface, a lower surface extending beyond the upper surface in a generally horizontal direction and a side surface connecting an end edge of the upper surface and an end edge of the lower surface with each other over the whole area. The first casing is provided with an upper surface coming into contact with the lower surface of the second casing over the whole area and a side surface including a generally vertical surface. An inclined surface connecting the generally vertical surface of the first casing and the generally horizontal surface of the second casing with each other, is provided continuously along the first casing and the second casing. | 03-05-2009 |
20090074459 | Optical Scanning Device and Image Forming Apparatus - A common photodetecting unit detects a plurality of beams scanned by a plurality of polyhedral reflection mirrors provided in a multiple stages with a common rotation axis, and generates a synchronization detection signal based on detected beams. The reflection mirrors make a predetermined angle θ1 in a direction of rotation of the reflection mirrors. When time between two consecutive synchronization detection signals on a time line generated by the common photodetecting unit is ti, where i is a positive integer equal to or smaller than number of split beams, at least one of ti is different from others. | 03-19-2009 |
20090110437 | DUPLEX DOCUMENT FEEDER - A duplex document feeder defines a feeding path. A charging means, a guiding plate equipped with elastic force and a feeding means are located along the feeding path. A driver means provides drive source to the charging means and the inverting means. The guiding plate blocks up the feeding path while the feeding path is empty. The charging means charges a document into the feeding path. The guiding plate is pressed out of the feeding path by the document conveyed via the charging means. Therefore, the document may be conveyed through the feeding path. While the document is conveyed to the feeding means, the guiding plate returns to block up the feeding path via elastic force thereof. | 04-30-2009 |
20090123179 | MULTI-BEAM OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A multi-beam optical scanning device includes a light source device, a deflector for deflecting a plurality of light beams from the light source device, and an imaging optical system for imaging a plurality of light beams deflected by the deflector upon a photosensitive drum, wherein a plurality of light beams, when they pass through an imaging optical element having a largest positive power in the sub-scan direction, pass through positions which are spaced apart from each other in the sub-scan direction, and wherein the photosensitive drum is so disposed that, when, among the plurality of light beams passing through the imaging optical element having a largest positive power in the sub-scan direction, a light beam which passes through a position furthermost in the sub-scan direction from a meridional of the imaging optical element having a largest positive power in the sub-scan direction is incident on the photosensitive drum, an incidence angle thereof in the sub-scan direction with respect to a surface normal of the photosensitive drum becomes smallest as compared with the other light beam or beams. | 05-14-2009 |
20090185826 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning device includes at least one scanning unit having a deflector for scanningly deflecting a light beam from a light source, and an imaging optical system for imaging the light beam scanningly deflected by the deflector upon a plurality of photosensitive drums, wherein, at each of a plurality of light paths extending from the deflector to the plurality of photosensitive drums, at least one reflection member for turning the light path into a sub-scan direction is provided, wherein the plurality of light paths are different in the number of the reflection members, wherein a polarization direction of a light beam incident on each reflection of the plurality of light paths is S-polarized at an optical axis of the imaging optical system, wherein the reflection surfaces of all the reflection members of the plurality of light paths have the same film structure, and wherein the difference among the plurality of light paths of a total turn angle defined by the reflection surface or surfaces of the reflection member or members in the sub-scan direction at the optical axis of said imaging optical system, is not greater than 40 degrees. | 07-23-2009 |
20090196653 | Method for commonly using scanning/printing path of a multifunction office machine and a device thereof - A method for commonly using scanning/printing path of a multifunction office machine and a device thereof. The device has a first and a second feeder slots adjacent to each other, whereby documents to be scanned and sheets to be printed can be respectively placed into the first and second feeder slots. A first restricting member is arranged on one side of the output end of the first feeder slot. A second restricting member is arranged on one side of the output end of the second feeder slot. A common pivotal member is disposed between the first and second restricting members. The common pivotal member is able to selectively drivingly abut against the first or the second restricting member. A power source serves to drive the first and second restricting members or the common pivotal member to respectively transfer the documents and the sheets for scanning and printing. | 08-06-2009 |
20090214259 | OPTICAL SCANNING APPARATUS - In an optical scanning apparatus, when air flow from a deflecting device is suppressed by a shielding member such as a transparent member, an image of a light beam is not formed at a predetermined position. In view of this, a first wall portion having a wall surface shaped concentrically with a center axis of a deflecting device is provided on an optical path directed from a laser light source toward the deflecting device. By providing at least the first wall portion having laser beam passing portions as openings passing through the wall surface of the first wall portion and providing a second wall portion connected to the first wall portion to define a closed surface except for the laser beam passing portions, warm air flow directed from the deflecting device to the laser light source is blocked. | 08-27-2009 |
20090220276 | OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS - A first beam separation device is arranged either to allow the light beams to enter and pass or to reflect the light beams in accordance with a direction of entrance of the light beams. A second beam separation device is provided either to allow or to reflect the light beams having passed through the first beam separation device in accordance a wavelength thereof. The light beam passing through the second beam separation device scans one of plural scan objectives and the light beam reflected by the second beam separation device is further reflected by the first beam separation device and then scans the other one of the plural scan objectives. A first imaging device is provided to correct a f-theta (fθ) performance and a curvature of an imaging plane to enable the light beams to scan the plural scan objectives at a constant speed. The first imaging device is integral with the first beam separation device. | 09-03-2009 |
20090252533 | DOCUMENT MANAGEMENT SYSTEM, IMAGE FORMING APPARATUS AND DOCUMENT MANAGEMENT METHOD - A document management system of the invention is a document management system in which identification information is embedded and an image is printed, and includes a print management unit to generate information relating to printing and including at least information of distribution destinations of printed materials on which the image is printed, an identification information management unit that issues the identification information the number of which is equal to the number of the printed materials, assigns one piece of the identification information to each of the printed materials, correlates the information of the distribution destinations with the identification information, and manages them, and an image formation unit to print, on a recording sheet, the image in which the identification information associated with the information relating to the printing is embedded. | 10-08-2009 |
20090279919 | SCANNING OPTICAL DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A scanning optical device includes a deflector for scanningly deflecting a plurality of light beams from a plurality of light sources, and an imaging optical system for imaging the light beams upon a plurality of scan surfaces to be scanned, wherein at least one piece of reflecting element is provided at each of a plurality of light paths extending from the deflector toward the scan surfaces, wherein there are relations | 11-12-2009 |
20100046984 | LIGHT SCANNING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - A light scanning device includes a light source emitting light, a polygon mirror reflecting the light while rotating, a mirror member having a mirror surface reflecting the light, reflected by the polygon mirror, toward an object to be scanned, a vibration preventing member attached to a portion of the mirror member excluding the mirror surface to prevent the mirror member from vibrating, and a housing supporting the polygon mirror and the mirror member. The mirror member extends in a predetermined direction in the housing, and the vibration preventing member is divided into a plurality of pieces that are so attached to the mirror member as to adjoin each other in the predetermined direction. | 02-25-2010 |
20100054809 | PLASTIC OPTICAL ELEMENT, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS USING THE OPTICAL SCANNING DEVICE - A plastic optical element for guiding a scanned light beam in a main scanning direction and a sub-scanning direction, which is prepared by a molding method using a die. The element includes: a main body including at least two optically functional surfaces, which are transfer surfaces formed by contacted with transfer surfaces of the die and through which the light beam passes; and at least two ribs located on surfaces of the main body other than the optically functional surfaces and extending in parallel in the main scanning direction. A recessed portion is present on a surface of at least one of the ribs, and the recessed portion has a side transfer surface and a bottom surface, which is a non-transfer surface, and the distance between the optically functional surfaces is less than the length of the main body in the sub-scanning direction. | 03-04-2010 |
20100074651 | SCANNING OPTICAL APPARATUS, IMAGE FORMING APPARATUS, AND CONTROL METHOD - A scanning optical apparatus includes, for example, a light source that outputs a light beam that has been pulse width modulated in accordance with input image data and a deflection unit that deflects the light beam so that the light beam scans the surface of an image carrier in the main scanning direction. The scanning optical apparatus furthermore includes a correction unit that corrects the pulse width and light amount applied to the light beam at each scanning position in the main scanning direction on the image carrier in accordance with focus error in the light beam at each scanning position. | 03-25-2010 |
20100086329 | LASER SCANNING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - Disclosed herein are a laser scanning unit and an image forming apparatus having the same. The laser scanning unit may include a polygon minor connected to a rotor of a driving motor, a member disposed opposite the rotor in the axial direction of a rotating shaft of the driving motor and a flux-reduction unit configured to reduce the flux of air or any other gas flowing in the space between the rotor and the member. | 04-08-2010 |
20100119258 | SCANNING OPTICAL APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A scanning optical apparatus includes: an incident optical system which is disposed in an optical path between a light source unit and a deflection unit, and includes an optical element for making a light flux emitted from the light source unit enter a deflection surface of the deflection unit with an oblique angle in a sub scanning section; and a positional regulation member for holding the optical element having an x reference surface for performing positional regulation of the optical element in an optical axis direction and a z reference surface for performing positional regulation of the optical element in a sub scanning direction. The optical element is held by a casing so that the x reference surface and the z reference surface contact with the positional regulation member of the casing. The principal ray of the light flux outgoing from the optical element satisfies a conditional equation (1). | 05-13-2010 |
20100124434 | LIGHT SOURCE DEVICE, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS - A coupling optical system that couples a light beam from a light source. A separation optical element on which the light beam is incident through the coupling optical system includes an opening through which a part of the light beam having a highest light intensity passes, and reflects other part of the light beam incident on a surrounding area of the opening as a monitoring light beam. A light shielding member includes at least one of a light shielding portion arranged on an optical path between the light source and the coupling optical system and a light shielding portion arranged on an optical path between the coupling optical system and the separation optical system. | 05-20-2010 |
20100124435 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - An optical scanning apparatus includes a light source configured to emit a light beam, a rotational polygonal mirror configured to deflect and scan the light beam emitted from the light source, a drive unit configured to drive the rotational polygonal mirror to rotate, an optical member configured to guide the light beam with the scanning rotational polygonal mirror to a member to be scanned, a storage member configured to accommodate the rotational polygonal mirror and the optical member therewithin, and a wall configured to partition a space inside the storage member into a first space in which the rotational polygonal mirror is installed and a second space in which the optical member is installed, wherein the wall has an opening through which air can pass, and the opening is configured to pass the light beam reflected by the scanning rotational polygonal mirror, and the wall has a vent which is different from the opening and configured to send at least a part of the air that has passed through the opening, to the first space while the rotational polygonal mirror is rotating, and a width of the vent in a scanning direction of the light beam is smaller than a width of the opening. | 05-20-2010 |
20100202799 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning apparatus, including an incident system that allows a beam from the light source to enter to deflector; and an imaging system that images the beam deflected by the deflector on a scanning surface, in which the incident system includes a first and second systems, the first system includes first and second elements each having a positive power with rotational symmetry, the light source is positioned at a shorter distance from the front focus position of the first element, the first element is formed integrally as a unit, powers of the second element and the first system, magnifications within main and sub-scanning sections of entire system, and focus movement within the main and sub-scanning sections on the scanning surface when the second element is moved in the optical axis direction are appropriately set. | 08-12-2010 |
20100247147 | IMAGE-FORMING DEVICE - An image-forming device has a plurality of cylindrical image-carrying members, and an optical scanning unit. The plurality of cylindrical image-carrying members is provided in a main casing for rotating about respective rotational axes. The rotational axes are parallel to one another and juxtaposed in a single direction. The optical scanning unit is provided in the main casing and has a plurality of laser generators, a single rotatable polygon mirror, a plurality of mirrors, and a plurality of lenses. The plurality of laser generators is provided one-to-one relationship to the plurality of image-carrying members to emit respective laser beams. The single rotatable polygon mirror deflects the respective laser beams to scan the respective image-carrying members therewith. The plurality of mirrors is provided one-to-one relationship to the plurality of image-carrying members to guide the respective laser beams along respective optical paths to the respective image-carrying members. The plurality of lenses is provided one-to-one relationship to the plurality of image-carrying members and provided in the respective optical paths and between the respective mirrors and the respective image-carrying members. Distances from the respective mirrors to the respective image-carrying members being equal to one another. | 09-30-2010 |
20100266313 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - A disclosed optical scanning device includes: a light source unit having plural luminous sources; a light source driving unit modulating each luminous source in accordance with pixel information; an oscillating mirror supported on a twist beam as a rotation shaft, the oscillating mirror collectively deflecting light beams from the luminous sources and performing reciprocating scanning on a surface to be scanned; an imaging optical system imaging the light beams from the luminous sources on the surface to be scanned; an oscillating mirror driving unit setting a scanning frequency f in accordance with a resonance frequency of the oscillating mirror; and a pitch adjustment unit adjusting beam spot intervals p in a sub-scanning direction in accordance with the scanning frequency f of the oscillating mirror that has been set. | 10-21-2010 |
20110064470 | LIGHT DEFLECTOR DEVICE AND IMAGE FORMING APPARATUS - A light deflector device includes a light deflector having an oscillation system, a driving unit for driving the oscillation system and a drive controlling unit for supplying a drive signal. The oscillation system simultaneously generates a first oscillating motion of a first frequency and a second oscillating motion of a second frequency. The drive controlling unit supplies a drive signal formed by synthetically combining a first signal having the first frequency and a second signal having the second frequency to the driving unit and, at the same time, another drive signal for changing at least the amplitude of the first oscillating motion, the amplitude of second oscillating motion or the relative phase difference of the first oscillating motion and the second oscillating motion to the driving unit in order to correct an offset of scanning light deflected by the light deflector. | 03-17-2011 |
20110110687 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - An optical scanning device includes a plurality of light sources, a light deflector, and a single scan lens. The light deflector deflects a plurality of light beams emitted from the light sources by a same face for scanning a plurality of to-be-scanned portions simultaneously. The single scan lens receives the light beams from the light deflector and focuses the light beams onto each of the plurality of to-be-scanned portions to scan the to-be-scanned portions simultaneously. The single scan lens is used in common for the light beams, and has one incidence plane and a plurality of exit planes in a sub-scanning direction separately prepared in the sub-scanning direction for each of the to-be-scanned portions. The incidence plane has a refractive power of the lens in the sub-scanning direction decreasing toward peripheral portions in the main scanning direction. The exit planes have positive refractive power in the main and sub-scanning directions. | 05-12-2011 |
20110116835 | SCANNING OPTICAL APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A scanning optical apparatus includes scanning units, a deflector. Each of the apparatuses includes a light source, an imaging optical system including imaging optical elements imaging a beam deflected by the deflector on a scanning surface. The scanning surfaces are scanned with beams in opposing directions. When a main scanning direction of the first scanning unit is a Y positive direction, a sign is the same between θ | 05-19-2011 |
20110182621 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS COMPRISING THE SAME - An optical scanning device includes a housing, a laser light source outputting a laser light, a polygon mirror arranged in an arrangement space and deflecting the laser light to scan a predetermined object with the laser light while rotating, a polygon motor rotating the polygon mirror, a control board arranged in the arrangement space and controlling the polygon motor, and a flow-control member arranged in the arrangement space and guiding an airflow generated by a rotation of the polygon mirror to an outside of the arrangement space to circulate the airflow within the housing. | 07-28-2011 |
20110217077 | SURFACE-EMITTING LASER DEVICE, SURFACE-EMITTING LASER ARRAY, OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - A surface-emitting laser device configured to emit laser light in a direction perpendicular to a substrate includes a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light; and a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part. The outside area within the emitting area has shape anisotropy in two mutually perpendicular directions. | 09-08-2011 |
20110318057 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - An optical scanning device includes: a light source that emits light rays; an aperture member that adjusts a diameter of the light rays; a deflector including a plurality of reflecting surfaces that deflect the light rays; a scanning optical system that guides a light ray, of the light rays incident on the deflector and deflected by the deflector so as to be subjected to scanning onto a to-be-scanned surface; and a synchronization detector that performs synchronization detection by using a light ray, of the light rays, reflected to the aperture from the deflector is provided. | 12-29-2011 |
20110318058 | LIGHT SCANNING UNIT AND IMAGE FORMING APPARATUS COMPRISING THE SAME - A light scanning unit includes: a light source unit; a polygon mirror for deflecting and scanning light emitted from the light source unit, in a main scanning direction, and having a plurality of deflection surfaces and a plurality of edges at which adjacent deflection surfaces meet one another; an image forming optical system for condensing the deflected light; and a synchronization detection optical system for detecting a portion of light that is divided and reflected at an edge of the polygon mirror. The light scanning unit may be incorporated into an image forming apparatus. | 12-29-2011 |
20120057902 | METHOD OF MANUFACTURING SURFACE EMITTING LASER, AND SURFACE EMITTING LASER, SURFACE EMITTING LASER ARRAY, OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - A disclosed method of manufacturing a surface emitting laser includes laminating a transparent dielectric layer on an upper surface of a laminated body; forming a first resist pattern on an upper surface of the dielectric layer, the first resist pattern including a pattern defining an outer perimeter of a mesa structure and a pattern protecting a region corresponding to one of the relatively high reflection rate part and the relatively low reflection rate part included in an emitting region; etching the dielectric layer by using the first resist pattern as an etching mask; and forming a second resist pattern protecting a region corresponding to an entire emitting region. These steps are performed before the mesa structure is formed. | 03-08-2012 |
20120057903 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning device configured to remove or sufficiently reduce ghost light includes an input optical system for directing a light beam from a light source to a deflecting surface of a deflector, and an imaging optical system for imaging a light beam scanningly deflected by the deflecting surface upon a surface to be scanned, wherein, in a sub-scan section, the light beam is incident on the deflecting surface of the deflector from an oblique direction with respect to an optical axis of the imaging optical system, wherein a light blocking member for blocking ghost light is disposed on a light path between the deflecting surface and the scanned surface, wherein an end portion of the light blocking member in the sub-scan direction is formed with a curved shape having a height in the sub-scan direction which height changes in accordance with the position in the main-scan direction. | 03-08-2012 |
20120141167 | Polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus - A polygonal mirror, a light scanning unit using the polygonal mirror, and an image forming apparatus. The polygonal mirror is formed of a plastic and includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis, and an internal mirror surface that defines a hole, wherein a ratio of an internal diameter d to an outer diameter D satisfies 0.1≦d/D≦0.3. | 06-07-2012 |