Abstract: Apparatus and methods for coupling an optical beam from an optical source to a hi-tech system are described. A compact, low-cost beam-shaping and steering assembly may be located between the optical source and hi-tech system and provide automated adjustments to beam parameters such as beam position, beam rotation, and beam incident angles. The beam-shaping and steering assembly may be used to couple an elongated beam to a plurality of optical waveguides.

Abstract: An exposure head configured to expose a photoreceptor includes a substrate having a plurality of light emitting portions, a lens array having a plurality of lenses that condense light emitted from the light emitting portions onto the photoreceptor, and a holder that holds the substrate and the lens array. The holder has an opposing surface including an opening into which the lens array is inserted and facing the photoreceptor in an optical axis direction of the lens. The opposing surface has a contacting surface on which a cleaning rod cleaning a light exit surface of the lens array abuts. The holder includes a sealing agent that seals a gap between a side wall of the lens array and an edge of the opening along a longitudinal direction of the holder, and a groove formed in the opposing surface between the opening and the contacting surface. The sealing agent is applied between the groove and the side wall.

Abstract: A control device includes a controller that determines, based on physical property information corresponding to physical property of a recording sheet and read information on an image evaluated as abnormal through reading of an image on the recording sheet by a reading section on a recording sheet conveyance path, a process condition under which an image forming section performs image forming on the recording sheet.

Abstract: The present invention relates to a retention apparatus comprising a) a retention body, which delimits an inner region at least on a first side and a further side opposite to the first side, and b) at least one spring element; wherein the retention body comprises, on the first side, a first receiving portion facing the inner region and, on the further side, a second receiving portion facing the inner region; wherein the retention apparatus is embodied to retain at least one optical module, which has a light input side and an opposing light output side, by means of the first receiving portion, the second receiving portion, and the at least one spring element in a retention state, in such a way that the at least one optical module in the retention state is retained a. in a first direction extending from the light input side to the light output side by means of an interlock of i. the at least one optical module with the first receiving portion and ii.

Abstract: Methods, devices and systems for efficient 3D printing using a single compact device are set forth. Some embodiments utilize a circular-shaped build area revolving symmetrically around a single center point utilizing a continuous helical printing process. Laser diodes or vertical-cavity surface-emitting lasers (VCSELs) are utilized as an energy source for curing the print material. The VCSELs can be integrated with the print head and can form an array which can be staggered or linear. In some embodiments, the VCSELs (and the corresponding print head) can be connected to a rotating platform, which can rotate independently from the revolving build area. In some embodiments, a thermoelectric cooler and/or a fluid cooler can provide cooling to the VCSELS.

Abstract: A light emitting component includes: a first light emitting element row including light emitting elements arranged in a main scanning direction; and a second light emitting element row including light emitting elements arranged in the main scanning direction such that the second light emitting element row is deviated from the first light emitting element row in a sub scanning direction and each of the light emitting elements in the second light emitting element row is positioned between light emitting elements adjacent to each other in the first light emitting element row, and a light emitting point area that is an area where each light emitting element of the first light emitting element row emits light, and a light emitting point area that is an area where each light emitting element of the second light emitting element row emits light are overlapped with each other in the main scanning direction.

Abstract: A three-dimensional printing apparatus includes a container and a projecting structure. The container is configured to contain a liquid photosensitive material. The projecting structure is configured to provide a variety of molding beams to irradiate the liquid photosensitive material. The photoinitiator is suitable for polymerizing with a monomer after receiving the first molding beam with the first wavelength to form a solidified layer with a first color, and the photoinitiator is suitable for polymerizing with the monomer after receiving the second molding beam with the second wavelength to form a solidified layer with a second color, wherein the first color is different from the second color. The projecting structure comprises a light combiner module, disposed on the transmission paths of a variety of light beams. The wavelengths of the first molding beam and the second molding beam are between 355 nm to 415 nm.

Abstract: According to one embodiment, a display device includes a semiconductor layer, a first insulating layer, a gate electrode, a second insulating layer, a third insulating layer, a color filter, and transparent conductive layers including a pixel electrode, a first conductive layer, and a second conductive layer. The first conductive layer is located between the second insulating layer and the third insulating layer, and is in contact with a second area of the semiconductor layer. The second conductive layer is located on the color filter and is in contact with the first conductive layer. The pixel electrode is located on the second conductive layer and is in contact with the second conductive layer.

Abstract: A three dimensional (3D) printing apparatus to print an implantable bone scaffold (IBS) in an aseptic environment is described. The 3D printing apparatus includes a sterile cartridge. The sterile cartridge contains a sterile printing material, a print nozzle, and a plunger. The 3D printing apparatus also includes a heater configured to indirectly heat the printing material. In addition, the 3D printing apparatus includes a cartridge receiver configured to retain the sterile cartridge. A sterile receiving plate is positioned below the print nozzle. A cover encompasses and maintains the sterile cartridge and the sterile receiving plate in an aseptic environment. A filter fan unit (FFU) overlays a section of the cover. Positive laminar filtered air flow created by the FFU maintains the aseptic environment inside a printing chamber. An ultraviolet light source irradiates the receiving plate. A movable diaphragm separates a printer mechanism, below the receiving plate, from the printing chamber.

Abstract: The present invention provides a diffuser plate whose luminance of emission light emitted from a microlens is even in a diffusion range. The diffuser plate comprises a projection side main surface, an emission side main surface, and a fine structure having a plurality of microlens shape parts with a microlens-like shape. A numerical aperture NA of the projection light is greater than 0 and 0.140 or less. An incident angle ?i formed by an optical axis of the projection light at the microlens shape part and a normal of the projection side main surface intersecting with each other is in a range of 0 to 50 degrees. At least one of the plurality of microlens shape parts emits the emission light at an emission angle ?o formed by the optical axis of the emission light and the normal of the projection side main surface intersecting with each other.

Abstract: An image recording apparatus includes: a laser emitting device configured to emit laser beams emitted from a plurality of laser light-emitting elements; an optical fiber array including a plurality of optical fibers provided corresponding to the laser light-emitting elements and configured to guide the laser beams emitted from the laser light-emitting elements to a recording object that relatively moves with respect to the laser emitting device, laser emitting portions of the respective optical fibers being arrayed in an array form in a predetermined direction; and an image recording unit configured to control the laser emitting device so as to irradiate the recording object which relatively moves with respect to the laser emitting device in a direction different from the predetermined direction, with laser beams via the optical fiber array, to heat the recording object and record an image.

Abstract: An optical unit includes an optical module that includes a light emitting element array in which a plurality of light emitting elements are arranged, a lens array disposed facing the light emitting element array on an optical path of light emitted from the plurality of light emitting elements, and a fixing part configured to fix the light emitting element array to the lens array. The optical unit also includes a member configured to have a larger coefficient of thermal expansion than a coefficient of thermal expansion of the light emitting element array and a fastening part configured to fasten the optical module on a surface of the member. The fastening part is configured to fasten the optical module so as to enable expanding and contracting in a plane parallel to the surface of the member.

Abstract: The embodiments described herein relate to a software application platform, which enhances image patterns resolution on a substrate. The application platform method includes running an algorithm to provide different target polygons for forming a pattern on a target. A minimum feature size which may be formed by a DMD is determined. For each target polygons smaller than the minimum feature size determining to line bias or shot bias the one or more target polygons to achieve an acceptable exposure contrast at the target polygon boundary. The one or more target polygons smaller than the minimum feature size are biased to form a digitized pattern on the substrate. Electromagnetic radiation is delivered to reflect off of a first mirror of the DMD when the centroid for the first mirror is within the one or more target polygons.

Abstract: An image forming apparatus includes a photosensitive drum, an image forming unit including an optical scanning device, a cleaning mechanism configured to clean a transparent window of the optical scanning device, and a control unit configured to cause the cleaning mechanism to perform a cleaning operation on the transparent window. The number of pages on which image formation is allowed to be performed for recording sheets in a period between cleaning operations performed by the cleaning mechanism is smaller in a case where image formation is performed on recording sheets in which the amount of generation of paper dust is large than in a case where image formation is performed on recording sheets in which the amount of generation of paper dust is small.

Abstract: An image forming apparatus calculates a dew point temperature from an outside air temperature, and determines whether a temperature near an optical unit is equal to or lower than the dew point temperature. In a case where the temperature near the optical unit is equal to or lower than the dew point temperature, the image forming apparatus determines that a condition of occurrence of dew condensation on a surface of a dustproof glass of the optical unit is satisfied or not, and displays a message on an operation display unit instructing a user to clean the surface of the dustproof glass using a cleaning tool.

Abstract: An EUV collector serves for use in an EUV projection exposure apparatus. The collector guides EUV used light emitted by a plasma source region. An overall impingement surface of the collector is impinged upon by radiation emitted by the plasma source region. A used light portion of the overall impingement surface guides the EUV used light. An extraneous light portion of the overall impingement surface is impinged upon by extraneous light radiation, the wavelength of which differs from that of the used light. The used light portion and the extraneous light portion are not congruent. This EUV collector has increased efficiency can involve reduced production costs.

Abstract: Apparatus and methods for coupling an optical beam from an optical source to a hi-tech system are described. A compact, low-cost beam-shaping and steering assembly may be located between the optical source and hi-tech system and provide automated adjustments to beam parameters such as beam position, beam rotation, and beam incident angles. The beam-shaping and steering assembly may be used to couple an elongated beam to a plurality of optical waveguides.

Abstract: A near-eye display (NED) includes a source assembly that emits image light, a waveguide-based display assembly, and a controller coupled to the waveguide-based display assembly, and an optical assembly. The waveguide-based display assembly includes a liquid crystal (LC) waveguide, an input area, and an output area. The LC waveguide comprising a first glass layer, a second glass layer, and a LC layer between the first and second glass layers. The LC waveguide propagates the image light in-coupled via the input area in accordance with emission instructions toward the output area that out-couples the image light to a user's eye. The controller generates the emission instructions and provides the emission instructions to the LC waveguide for generating the image light of substantially uniform brightness.

Abstract: An exposure device includes a plate member, a plurality of light-emitting elements, and an optical system. The plate member extends in both a first direction and a second direction intersecting with the first direction. The light-emitting elements are disposed on the plate member side by side in the first direction. The light-emitting elements emit respective light beams in the second direction. The optical system is disposed on the plate member and faces the light-emitting elements in the second direction. The optical system performs imaging of the light beams emitted by the respective light-emitting elements.

Abstract: A vehicular camera apparatus includes a lens and a hood provided below the lens. The hood includes a rib structure and a hole structure. The rib structure is constituted of ribs that each protrude upward from a bottom wall of the hood and are arrayed in an optical axis direction of the lens. Each of the ribs has a front surface on the opposite side to the lens and a rear surface on the lens side. The front surface makes an acute angle with an imaginary plane that contains an upper surface of the bottom wall. The rear surface makes an obtuse angle with the imaginary plane. The hole structure is constituted of holes formed in the bottom wall. Each of the holes is formed along a corresponding one of the ribs and includes, at least, a projection of the front surface of the corresponding rib on the imaginary plane.

Abstract: An image generation device having: a spatial light modulator; a source of light; a beam deflector; an illumination waveguide and an image transport waveguide, each waveguide containing at least one switchable grating; and a coupler for directing scanned light into a first set of TIR paths in said illumination waveguide. A switchable grating in the illumination waveguide diffracts light onto the SLM, a switchable grating in the image transport waveguide diffracting image-modulated from the SLM into a waveguide path.

Abstract: A novel surgical lens system including a lens and a reflective element. The lens is placed on, or above, a cornea of an eye of a subject for enabling inspection of the eye. The reflective element is incorporated into the lens. The reflective element reflects a light beam toward the eye of the subject. The reflective element increases the divergence of the light beam, such that the divergence of the reflected light beam is larger than the divergence of the light beam. The light beam is emitted by a non-invasive light source positioned externally to the eye.

Abstract: An optical system for transmitting a source image is provided. Light having a field angle spectrum emanates from the source image. The optical system includes an optical waveguide arrangement, in which light can propagate by total internal reflection. The optical system also includes a diffractive optical input coupling arrangement for coupling the light emanating from the source image into the optical waveguide arrangement. The optical system further includes a diffractive optical output coupling arrangement for coupling the light that has propagated in the optical waveguide arrangement out from the optical waveguide arrangement. The disclosure also provides related methods.

Abstract: An optical scanning device includes a rotating polygon mirror, a light source that irradiates first and second light beams at one side of the rotating polygon mirror and irradiates third and fourth light beams at the other side thereof, a first optical element that reflects the first light beam and allows the second light beam to pass therethrough, a second optical element that reflects the second light beam, a third optical element that allows the third and fourth light beams to pass therethrough, and a fourth optical element that reflects the fourth light beam. The second light beam is a light beam corresponding to yellow, the first, the third, and the fourth light beams are light beams corresponding to three colors other than the yellow. Between the third and fourth optical elements, a scanning lens is arranged. Between the first and second optical elements, a scanning lens is not arranged.

Abstract: An illuminator apparatus uses positional offset of an array of light emitting areas and a lens array to control resulting direction and diffusion of a combined overall beam of light. Specifically, translation of the lens array relative to the light emitting area array enables steering of the overall beam, and rotation of lens array relative to the light emitting area array controls overall beam divergence.

Abstract: An optical device includes a plurality of optical ports for receiving optical beams. The optical device also includes a plurality of toric micro lenses each receiving one of the optical beams from a respective one of the optical ports. A dispersion element is provided for spatially separating in a dispersion plane the optical beam into a plurality of wavelength components. At least one focusing element is provided for focusing the plurality of wavelength components. A programmable optical phase modulator is also provided for receiving the focused plurality of wavelength components. The modulator is configured to selectively direct the wavelength components to prescribed ones of the optical ports. The toric lenses impart positive power to the optical beams in the port plane and negative optical power to the optical beams in a plane orthogonal to the port plane.

Abstract: A multifunctional 3D scanning/printing apparatus is disclosed in the present invention, wherein the multifunctional apparatus comprises both 3D scanning and printing functions, by sharing a Digital Light Processing (DLP) projector or using a beam splitter (for example, a transflective mirror or a flipping mirror, etc.) to achieve a configuration for all sorts of 3D scanning and 3D printing equipment with the required elements within the same apparatus, and uses the accuracy-increasing apparatus (for example, a prism, a lenticular lens, other asymmetric lenses, etc.) so that the measurement accuracy from the two image sensors will not be restricted by the limited space.

Abstract: A method of controlling a print engine, the method comprising: printing a first test image including a number of scans of printing components at a first setting of the array of printing components; printing at least a second test image by a number of scans of the printing components at a modified setting of the array of printing components, the modified setting being different from the first setting, wherein the modified setting provides a modified setting for each one of the printing components which is varied according to the position of the respective printing component in the array; optically scanning the printed test images and determining the distinctiveness of a scan band within the printed test images for each one of the test images; and deriving an optimum setting of the array of printing components from a comparison of the determined distinctiveness.

Abstract: Provided is a light scanning apparatus, including: a light source; a rotary polygon mirror; an optical member guiding a light beam; an optical box on which the light source is mounted and which contains the rotary polygon mirror and the optical member; a cover covering an opening of the optical box; a fixation unit fixing the cover on the optical box; the cover having a dust-proof member which is sandwiched between the cover and a side wall of the optical box; and the dust-proof member including an abutment portion against which the side wall is brought into abutment, and non-abutment portions provided on both sides of the abutment portion and separated from the side wall, and the dust-proof member including a groove in one of the non-abutment portions which is located on a side opposite to another one located on a side where the fixation unit is provided.

Abstract: The present invention relates to an exposure device which forms an image of a pattern on a mask onto a substrate with microlens arrays to expose the substrate, and reduces a size of an lighting unit which emits an exposure light. Microlens arrays include plural microlenses which are arranged two-dimensionally and arranged in a direction intersecting a movement direction. Lighting unit includes an LD array bar in which plural laser diodes are arranged, and lighting optical system which transforms plural emitted lights emitted from the plural laser diodes into an exposure flux having a slit form. The slit form spreads across plural pieces of the microlenses, and which, with respect to the movement direction, is limited in an area not reaching a microlens arranged in an adjacent row in the movement direction, and illuminates plural microlenses arranged in a row with an exposure light by the exposure light flux.

Abstract: A recording method including: emitting laser light from an optical fiber array to record an image formed of writing units with moving a recording target and the optical fiber array relatively using a recording device including a plurality of laser light-emitting elements and an emitting unit including the optical fiber array, in which a plurality of optical fibers configured to guide laser light emitted from the laser light-emitting elements are aligned, wherein a maximum length of the writing unit along a sub-scanning direction is controlled with set values of: a duty ratio and a cycle of a pulse signal input to the emitting unit; recording energy applied to the recording target; and a spot diameter of the laser light, to record with overlapping an edge of the writing unit with an edge of the adjacent writing unit in the sub-scanning direction.

Abstract: The invention relates to a method for laser welding two plastic components A, B brought into contact at least in the joining area, wherein component B facing away from the laser radiation consists of a plastic matrix with a white pigmentation of 1.5 5-20 wt.-%, and component A facing the laser radiation, through which the laser beam passes in the welding process, exhibits a plastic matrix. For a given laser wavelength the travel distance of the laser beam through the component A measures at most 10 mm, and given a white pigmentation of the component A in wt.-%, the product of the travel distance of the laser 10 beam through the component A in mm and white pigmentation in wt.-% is less than 1.25, and the travel distance of the laser beam through the component A measures at most 1 mm.

Abstract: A variety of tools for demonstrating the mathematical properties is disclosed. In one embodiment, a demonstrator uses the tools to illuminate geometric relationships between objects in two and three-dimensional space. The tools may be a stationary exhibit or collected into a portable kit. Whether portable or stationary, the tools provide an easy to use, multi-functional, and visually captivating vehicle for demonstration of geometric properties.

Abstract: A light scanning apparatus, including: a light source; a deflector having a rotary polygon mirror configured to deflect the light beam emitted from the light source, and a motor configured to rotate the polygon mirror; a plurality of reflecting mirrors configured to reflect the light beam to the photosensitive member; and an optical box on which the light source is mounted, wherein the optical box has an installation wall on which the deflector is installed and a support wall positioned on a side of the photosensitive member with respect to the polygon mirror, the support wall being provided with a support portion configured to support at least one reflecting mirror, a stepped portion having a plurality of steps is formed between the installation wall and the support wall, and a back surface of the stepped portion has a shape following an inside surface of the stepped portion.

Abstract: Various embodiments may relate to a method for producing an optoelectronic component. The method may include increasing a refractive index of a substrate in at least one region at at least one predefined position in the substrate in such a way that the region having an increased refractive index extends as far as a surface of the substrate, and forming an electrode layer on or above the surface of the substrate at least partly above the region having an increased refractive index.

Abstract: The present invention provides a method for stably and robustly laser-welding transparent resins together without compromising transparency. Before laser welding, the joining surface of at least a second transparent resin is subjected to photooxidation, thereby reducing the laser transmittance without reducing the visible light transmittance. A laser beam in the ultraviolet region at a wavelength of 400 nm or less, or a laser beam with a pulse width of 10 ps or less is irradiated while the second transparent resin is pressurized to perform laser welding.

Abstract: A method of scanning a sample includes simultaneously forming a plurality of co-linear scans. Each scan is formed by a sweep of a spot by an acousto-optical device (AOD). The co-linear scans are separated by a predetermined spacing. A first plurality of swaths are formed by repeating the simultaneous forming of the plurality of co-linear scans in a direction perpendicular to the co-linear scans. The first plurality of swaths have an inter-swath spacing that is the same as the predetermined spacing. A second plurality of swaths can be formed adjacent to the first plurality of swaths. Forming the second plurality of swaths can be performed in an opposite direction to that of the first plurality of swaths or in a same direction. An inspection system can implement this method by including a diffractive optical element (DOE) path after a magnification changer.

Abstract: The light scanning apparatus includes: a deflection element including first and second deflection surfaces; a rotor including a top surface facing the deflection element; a first imaging optical system including a first imaging lens; a second imaging optical system including a second imaging lens arranged to face first imaging lens; first and second shielding members. The first shielding member is arranged at a position where an edge portion thereof on a side closer to top surface in a sub-scanning direction blocks light reflected by first imaging lens. The second shielding member is arranged at a position where an edge portion thereof on a side closer to top surface in sub-scanning direction blocks light that has passed by first shielding member and been reflected by top surface.

Abstract: A photoelectric conversion device includes a semiconductor substrate, an insulating layer provided on the semiconductor substrate, an electrode provided on the insulating layer, a photoelectric conversion film provided on the electrode for converting received light to charges, a line connected between the electrode and the semiconductor substrate, a first planar electrode provided in the insulating layer and connected to the electrode, and a second planar electrode provided in the insulating layer between the first planar electrode and the semiconductor substrate.

Abstract: A scanning optical system includes a light source including light emission points, a deflector for deflecting a beam in main scanning direction, an optical element for guiding the beam from the light source to the deflector, and a stop for limiting the beam from the optical element, sets the followings appropriately: distance from the light source to the stop; focal length of the optical element; distance in main scanning direction from an intersection of optical axis and the light source at a farthest light emission point from the optical axis in main scanning direction; stop aperture diameter in main scanning direction; total angle at half maximum of a far-field pattern of emitted light; and angle between a marginal ray within main scanning section at the farthest light emission point from the optical axis in main scanning direction and a ray of a maximum intensity.

Abstract: An imaging system includes incidence faces composed of optical faces having an image focusing function; prisms; and exit faces. The incidence faces are arranged with a first pitch along a first axial direction. The prisms are arranged with a second pitch along the first axial direction. The exit faces are arranged with a third pitch along the first axial direction. The first axial direction is set as a Y direction. A normal line direction of a face top of an optical face of the incidence face in a plane perpendicular to the first axial direction is set as a X direction. A direction perpendicular to the Y direction and the X direction is set as a Z direction. In a XZ cross-section plane, a width of the prism in the Z direction is smaller than a width of optical face of the incidence face in the Z direction.

Abstract: An optical scanning apparatus for optically scanning at least one scanning target surface, the optical scanning apparatus including: a light source; a light-flux dividing unit disposed on a main optical path of a main light flux emitted from the light source, and the light-flux dividing unit configured to spatially divide the main light flux; an optical deflector disposed on a divided optical path of the divided light flux, and the optical deflector configured to deflect the divided optical path; an optical path opening/closing switch unit disposed on the divided optical path between the light-flux dividing unit and the optical deflector, and the optical path opening/closing switch unit configured to interrupt or pass at least one of the divided optical path; and a controller configured to control operation of interrupting or passing the at least one of the divided optical path by the optical path opening/closing switch unit.

Abstract: An optical writing device for forming an electrostatic latent image on a photoreceptor by exposing the photoreceptor to light modulated in accordance with image data. The optical writing device has: a substrate; a light-emitting-element array including a plurality of light-emitting elements supported by the substrate to be arranged in a main-scanning direction; and a light-receiving-element array substantially in parallel to the light-emitting-element array, the light-receiving-element array including a plurality of light-receiving elements supported by the substrate to be arranged in the main-scanning direction. For light-quantity measurement of one of the light-emitting elements, at least an output value output from one of the light-receiving elements of which center is located in a different position, with respect to the main-scanning direction, from a center of the one of the light-emitting elements is used.

Abstract: An optical writing device includes a light source, an optical deflector that deflects and scans light from the light source, a pre-deflector optical system that guides the light from the light source to the deflector, a post-deflector optical system that guides the scanned light to a target surface, a cover covering the deflector and including a first opening and a second opening provided at different positions, and a housing housing these optical elements. Light traveling from the light source to the deflector and the light scanned by the deflector are transmitted through the first opening but not through the second opening. During the rotation of the deflector, a forced inflow of air flowing from outside to inside the cover is generated in the first opening, and a discharged airflow flowing from inside to outside the cover is generated in the second opening.

Abstract: The invention relates to a marking and/or scanning head comprising a plurality of receiving spaces in which individual marking and/or sensing devices can be arranged for marking and/or scanning an object, wherein the receiving spaces are arranged in at least two sub-arrays, wherein at least one sub-array is movable and/or rotatable with regard to at least one other sub-array. The invention further relates to a marking and/or scanning apparatus and a method for operating a marking and/or scanning head or apparatus.

Abstract: A laser label printer for use with a laser markable medium includes a laser-diode fiber-coupled to an optical train, which includes a focusing lens for focusing the radiation on the medium. The focusing lens is traversed across the medium, with incremental motion of the medium between traverses, for line by line printing of the label. The printer includes a feature for protecting the focusing lens from contamination, and self-diagnostic and adjustment features.

Abstract: An image forming apparatus is provided that reduces main scanning jitter with a simple configuration and performs light amount control with high accuracy. The image forming apparatus includes: a laser emitting luminous flux; a main-scanning aperture portion shaping the luminous flux; a beam splitter splitting the luminous flux passed through the main-scanning aperture portion into a reflected beam and a transmitted beam; a rotary polygon mirror deflecting the transmitted beam so that the transmitted beam scans the surface of a photosensitive drum; and an optical box in which the laser, the main-scanning aperture portion, the beam splitter and the rotary polygon mirror are disposed. The main-scanning aperture portion is disposed so as not to block a deflected and transmitted beam. The beam splitter abuts against the main-scanning aperture portion so as not to block a deflected and transmitted beam deflected, and is positioned by abutting against the main-scanning aperture portion.

Abstract: An optical scanning device includes: a light source device that emits five light beams corresponding to four basic colors and a single specific color; and five scanning optical systems corresponding the five light beams. One light beam in a first waveband among the light beams corresponding to the four basic colors enters one scanning optical system of the five scanning optical systems. The one scanning optical system includes a dichroic mirror that transmits a light beam in a second waveband different from the first waveband. An angle ?b formed between a normal to the incidence plane of the dichroic mirror and orthogonal projection to an assumed plane orthogonal to the main scanning corresponding direction of the incident path of the light beam to the incidence plane of the dichroic mirror is set at an angle of 0° or more and an angle of 45° or less.

Abstract: A light scanning unit and an electrophotographic image forming apparatus are provided. The light scanning unit includes a light source emitting the light beams according to an image signal, an incident optical system including a flux-limiting element limiting the flux of light beams emitted by the light source, an optical deflector deflecting the light beams emitted by the light source in a main scanning direction, and an image forming optical system including a scanning optical element imaging the light beams deflected by the optical deflector on a scanning target surface, the light scanning unit forming an electrostatic latent image by scanning the light beams to the scanning target surface of the image bearing member. The scanning optical element of the scanning optical elements of the image forming optical system is eccentrically arranged from a central optical axis of the image forming optical system in a sub-scanning direction.

Abstract: An image forming apparatus includes a main body of the image forming apparatus; at least one image forming unit disposed in the main body; a light scanning unit that is disposed in the main body and scans light to form an electrostatic latent image on a photosensitive medium of the at least one image forming unit; a window open-closing shutter that is disposed to slidably move on a surface of the light scanning unit from which light emits, and moves between an open position where a light moving path is opened and a blocking position where the light moving path is blocked; a shutter operating lever that is disposed in the main body, and activates the window open-closing shutter to be positioned at either of the open position and the blocking position; and a pressure member that is disposed in the main body and presses the shutter operating lever.