Abstract: An exposure device includes a plurality of light emitting elements provided on a substrate, a plurality of hologram elements multiplexing-recorded in correspondence with the plurality of light emitting elements, respectively, such that, when the plurality of light emitting elements are made to emit light in the recording layer arranged on the substrate, a plurality of condensing points having light components emitted from two or more light emitting elements and condensed on one point, is formed, and a condensing point row extending in a predetermined direction is formed on the face to be exposed, and a driving unit that drives the plurality of light emitting elements, respectively.

Abstract: An optical scanning device includes an enclosure having a plurality of windows covered with transparent members. The enclosure houses a plurality of light sources, a scanning portion, optical elements and a light amount attenuation portion. The scanning portion deflects each of a plurality of light beams emitted from a plurality of light sources at a constant angular speed in a main scanning direction. The optical elements constitute respective light paths from the scanning portion to the windows for the plurality of light beams, respectively. The light amount attenuation portion attenuates light amount in a light path of a first light source among the plurality of light sources in a downstream side of the position where a light beam emitted from a second light source enters as stray light. The drive portion drives the first light source so as to compensate for light amount attenuated by the light amount attenuation portion.

Abstract: An optical scanning apparatus includes a housing, light source, deflector, imaging lens, reflective mirrors, a synchronization detector and synchronization detection mirror. The housing has a plate to partition the housing. The deflector deflects a light beam emitted from the light source. The imaging lens converts the deflected light beam into a constant speed scanning light beam. The reflective mirrors reflect the constant speed scanning light beam to a photoreceptor. The synchronization detector detects timing for starting scanning of the photoreceptor. The synchronization detection mirror reflects the light beam to the synchronization detector. At least one of the reflective mirrors is disposed midway in a synchronization detection light path extending from the deflector to the synchronization detection mirror. The light beam reflected by the synchronization detection mirror is reflected again by at least one of the reflective mirrors, such that the light beam is guided to the synchronization detector.

Abstract: Provided are a print head and an image forming apparatus. The print head, which selectively irradiates light to each pixel of an image on a photoconductor, the print head includes an illumination unit, which emits light, a liquid crystal layer, which transmits or intercepts the light incident from the illumination unit on a unit pixel basis according to an applied voltage, and a microlens array formed of liquid crystal polymer, which either focuses or does not focus the light passed through the liquid crystal layer onto the photoconductor.

Abstract: A light-emitting device includes: plural light-emitting elements arrayed in line; and a light-up signal wiring including block wirings that connect the plural light-emitting elements divided into plural blocks being units for controlling turning on and off of the light-emitting elements, that supply electric power for light emission to the light-emitting elements belonging to each of the blocks, and a main wiring that extends from a feeding point and to which the block wirings are connected.

Abstract: An exposure apparatus includes a light source that emits a plurality of light beams, a substrate on which the light source is mounted, a positioning member provided on a housing and being in contact with a positioning surface provided around the light source to position the light source with respect to the housing in an optical axis direction, the housing accommodating an optical system that guides the light beams, and an attachment member attached to the housing and including a portion that extends in a direction substantially perpendicular to the optical axis direction and that is bent over, an end of the bent portion being attached to the substrate such that the positioning surface around the light source is urged against the positioning member and the substrate is attached to the housing.

Abstract: An optical scanning system for a K station includes a resin scanning lens and three reflecting mirrors. Two reflectance ratios are calculated: one being the reflectance ratio of a luminous flux traveling toward the scanning start position of a drum-shaped photosensitive drum and the other being the reflectance ratio of a luminous flux traveling toward the scanning end position of the photosensitive drum. The magnitude relation between the two reflectance ratios is such that the reflecting mirror has an inverse magnitude relation to that of the other reflecting mirrors. Moreover, the difference is calculated between the largest value and the smallest value of the reflectance ratio, where the reflectance ratio depends on the angle of deviation of the polygon mirror. The reflecting mirror has the largest difference among the three reflecting mirrors.

Abstract: A semiconductor device includes three-terminal light emitting element array provided on a substrate, which includes a plurality of three-terminal light emitting elements which are substantially linearly arranged. Each three-terminal light emitting elements includes a first, second and third terminals. The third terminal is used to control a current between the first and second terminals. A Lead-out wiring portion is connected to the plurality of three-terminal light emitting elements. The three-terminal light emitting element array includes a common layer provided between two or more three-terminal light emitting elements adjacent to each other. The common layer mutually connects the second terminals (or the third terminals) of the two or three three-terminal light emitting elements.

Abstract: The invention relates to an apparatus for writing a flip image structure on a base. Said apparatus comprises a laser light source that has a control device for specifically modifying an angle at which the laser light emerges from the laser light source, and a holder for the base. According to the invention, two deflection elements for the laser light are provided in the beam range of the laser light source. Said deflection elements are arranged such that laser light of the laser light source that is deflected, especially reflected by the deflection elements is incident on the flip image structure of the base accommodated on the holder at a different angle of incidence. The invention further relates to a method that can be carried out especially by means of a disclosed apparatus.

Abstract: An optical scanning device includes a plurality of light sources, at least two securing units provided for each of the light sources, and a substrate for driving the light sources. The components are arranged such that the direction “A” in which the light sources are arranged has an upward slant with respect to a lateral direction (i.e. X direction) of the substrate, and the direction “B” in which the at least two securing units provided for each of the light sources are arranged has a downward slant with respect to the lateral direction of the substrate. Accordingly, a compact optical scanning device can be provided.

Abstract: A light source including a plurality of light emitting areas formed in a two-dimension array is mounted on a substrate. A holding member holds an optical system that shapes a laser beam emitted from each of the light emitting areas, a splitting element that splits a part of the laser beam passed through the optical system, and a light receiving system that receives split laser beam. A base member including an aligning unit that aligns the light source in a direction along an optical axis of the optical system and a direction perpendicular to the optical axis is connected to the holding member. An elastic member presses the substrate against the base member.

Abstract: There is provided an exposure device including: a light-emitting element array having an elongated support and plural light-emitting elements, the light-emitting elements being arranged in at least one row along a length direction of the support such that a spacing between two adjacent light-emitting elements is a pre-specified first spacing; and a hologram element array having a hologram recording layer disposed on the support and plural hologram elements formed, the plural hologram elements corresponding with each of the light-emitting elements and being formed such that a spacing along the support length direction between two adjacent hologram elements is the first spacing, and a diameter in the support length direction of each of the plural hologram elements being larger than the first spacing, such that a respective light emitted from each of the light-emitting elements is diffracted and focused toward a pre-specified image-forming plane by the corresponding hologram element.

Abstract: Light sources emit light beams onto deflecting surfaces of a deflecting unit through incident optical systems. The deflecting unit deflects the light beams in a uniform direction to form images onto different surfaces to be scanned through imaging optical systems. An optical path length, or a distance from a deflection point of the deflecting unit to a surface to be scanned, of an imaging optical system to form an image onto a surface to be scanned closest to the deflecting unit is different from that of an imaging optical system to form an image onto a surface to be scanned farthest from the deflecting unit. Also, the following condition is satisfied: 0.85<K1/K2<0.98 where K1 is a K? coefficient of an imaging optical system with a short optical path length, and K2 is that of an imaging optical system with a long optical path length.

Abstract: An optical scanner, which scans at least one scanned face by a light beam, includes a light source having a plurality of light emitting points, an optical system before a light deflector configured to form a plurality of light beams from the light source, a light deflector configured to deflect the light beams via the optical system before a light deflector and scan the deflected light beams, and a scanning optical system configured to focus on the scanned face the light beams deflected and scanned by a deflection face of the light deflector, the optical system before a light deflector including a first optical element having a negative power at least in a deflecting and scanning vertical direction, a second optical element having a power only in a deflecting and scanning direction and a third optical element having a power only in the deflecting and scanning vertical direction.

Abstract: An optical scanner includes a frame, a light source, an optical member, and a spacer. The light source emits a light beam. The optical member is mounted on the frame to guide the light beam to a scanning target. The spacer maintains the optical member at a predetermined position with respect to the frame. The spacer is formed of a photocurable resin that is cured in response to a predetermined light having a wavelength within a prescribed range.

Abstract: An optical scanner includes a light source, a deflector and a scanning optical system. The scanning optical system includes a first optical system including at least one resin scanning lens, and a second optical system between the target surface and one resin scanning lens. The second optical system includes at least one of a folding mirror(s) and a glass sheet(s), wherein m1+g2=m2+g1 is satisfied wherein m1 and g1 are respectively number of the folding mirror(s) and number of the glass sheet(s) to which the first ray has a shorter optical path than the second ray does, m2 and g2 are respectively number of the folding mirror(s) and number of the glass sheet(s) to which the first ray has a longer optical path than the second ray does.

Abstract: A light source device includes a surface emitting laser, a surface emitting laser holding unit on which the surface emitting laser is mounted, a parallel plate that is arranged on a light path of a light flux from the surface emitting laser so that the light flux enters into one surface thereof, and that is made of a transparent material, and a holder having a through hole that functions as a light path of the light flux from the surface emitting laser, wherein the surface emitting laser holding unit is brought into contact with the holder, the parallel plate is fixedly bonded to the holder, and a part of the through hole of the holder is sealed with the surface emitting laser holding unit and the parallel plate.

Abstract: In an optical scanning device, a light-source driving unit drives a light source to modulate a light beam in units of single dot, a deflecting unit deflects the light beam, and a scanning optical system guides the deflected light beam to a scanning surface having an active writing area for forming an image. A static beam spot size, which is a beam spot size of the light beam on the scanning surface when the light beam passes a predetermined image height, is set such that a scanning beam spot size, which is a beam spot size of the light beam on the scanning surface when the light beam is moved to scan during the light beam exposes a single dot, is kept substantially constant.

Abstract: 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.

Abstract: An optical scanning unit may include a light source unit configured to emit a light beam, an optical housing configured to receive and support the light source unit, an optical device configured to deflect the light beam and to focus the light beam on a light receiving member, and a fixing member configured to fix the light source unit to the optical housing by applying pressure to the light source unit, wherein the pressure is applied in a direction, which is substantially perpendicular to an optical axis direction of the light source unit.

Abstract: An image scanning apparatus includes a beam splitter disposed between a deflection surface and surfaces to be scanned. The beam splitter is formed of reflective surfaces and transmissive surfaces. One transmissive surface is disposed between the reflective surfaces in the sub-scanning direction, and an optical path of light beams reaching surfaces to be scanned that are physically closer to the deflection surface than a surface to be scanned located at the position physically farthest from the deflection surface between the reflective surfaces intersects with an optical path of a light beam reaching the surface to be scanned located at a position physically farthest from the deflection surface between the deflection surface and the transmissive surface in a sub-scanning cross section in the beam splitter.

Abstract: An optical scanning device includes four light sources, a pre-deflector optical system, a polygon mirror, an optical scanning system, etc. The optical scanning system includes deflector-side scanning lenses made of glass, imaging-surface-side scanning lenses made of resin, polarized light splitters, and reflecting mirrors. The deflector-side scanning lenses, the imaging-surface-side scanning lenses, the polarized light splitters, and the reflecting mirrors are arranged in this order on an optical path of light going from the polygon mirror toward drum-shaped photosensitive elements.

Abstract: An scanning optical apparatus of present invention converts plural light beams emitted from corresponding light source units by a light beam conversion unit, deflectively scans by a deflection unit, focuses by an imaging optical unit onto corresponding scanned surfaces. At least two of light source units are arranged along a direction perpendicular to the direction in which the light beams are emitted. The light beam conversion unit includes plural light beam conversion elements that reflect the light beams emitted in the same direction from the light source units to deflect the light beams in the same direction. Each of the light beam conversion elements has at least one reflecting surface having a power and at least one diffracting surface having a power, and has different powers with respect to the main scanning direction and with respect to the sub scanning direction.

Abstract: A laser induced thermal imaging (LITI) apparatus and a method of manufacturing an organic light emitting diode (OLED) display device using the LITI apparatus. The method of manufacturing the OLED display device using the LITI apparatus includes arranging an acceptor substrate on a substrate stage; forming a donor film on the acceptor substrate; disposing a patterned mask above the acceptor substrate; irradiating the donor film with a laser beam generated by a laser beam generator through an opening of the mask; and transferring a pattern of the donor film onto the acceptor substrate. The LITI apparatus and the manufacturing method allow a transfer layer of a donor film to be easily transferred onto a substrate by scanning a laser beam without regard to a size of the substrate.

Abstract: A write device includes an opening arranged on a casing of a write unit that emits irradiation light to expose a photoreceptor; a shutter unit movably mounted on the casing to open and close the opening; plural wall-like sections having respective different widths and being arranged in a standing manner on a side intersecting with a rotary shaft of a rotator that moves the shutter unit; a detecting unit that detects the plural wall-like sections moving in accordance with the rotation of the rotator; a measuring unit that measures a time period from when a wall-like section is detected until when the wall-like section is no longer detected; and a position detecting unit that determines the detected wall-like section by using the measured time period and the width thereof and detects the position of the shutter unit by using the determined wall-like section.

Abstract: An optical component bowing device includes a bending moment generating structure. In a particular embodiment, the bending moment generating structure can have extension members that extend in a direction substantially orthogonal to a longitudinal direction of an optical component. The extension members can be positioned adjacent longitudinal end portions of the optical component. The bending moment generating structure can also have loading members that load the extension members in a direction that is parallel to a longitudinal direction of the optical component, whereby displacement of the extension members can generate a bending moment in a supported portion of the optical component that reflects or shapes a light beam. The bending moment generating structure can also include a reflective surface. Extension members on at least one end of the optical component can be T-shaped when seen in plan view in a direction orthogonal to the reflective surface.

Abstract: Multiple beam raster output scanners (ROSs) and printing systems are presented in which an adjustable mirror or lens is provided in the optical beam path upstream of the ROS polygon mirror to allow automated electronic adjustment of line-to-line and swath-to-swath spacing at runtime.

Abstract: 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.

Abstract: An optical scanning device includes a first optical a light source that has a plurality of luminous points; a first optical system that shapes a plurality of beams of light; a rotary polygon mirror an optical scanning system that causes the beams of light deflected to form images on a surface to be scanned, wherein ? is assumed to be half of an angle formed between the optical axis of the first optical system and the optical axis of the optical scanning system within the deflecting/scanning surface, ? is assumed to be a distance between an intersection dc and an intersection hh, wherein ? is set to be zero or a negative value, given that ? is defined positive when the intersection dc is present on the optical-scanning side of the intersection hh.

Abstract: A line head, includes: a substrate which is provided with a plurality of luminous element groups which respectively include a plurality of luminous elements in a first direction which emit light beams; a lens array which includes a plurality of imaging lenses which are provided corresponding to the plurality of luminous element groups; and a light shielding member which is disposed between the substrate and the lens array and includes a plurality of light guiding holes which correspond to the plurality of luminous element groups, wherein the lens array is away from the light shielding member, an inner diameter of each of the plurality of light guiding holes in the first direction is a first light guiding hole diameter, and a bore diameter of each of the plurality of imaging lenses in the first direction is a first lens diameter, and the first light guiding hole diameter is smaller than the first lens diameter.

Abstract: A scanning optical device, comprises a light source to emit a light beam; a deflecting section to deflect the emitted light beam so as to scan; an optical element to make the scanning light beam to converge; and a correcting mechanism to correct an attitude of the optical element so as to adjust a convergence position of the scanning light beam; wherein at least a part of the correcting mechanism is arranged between the deflecting section and the optical element.

Abstract: An image forming apparatus switches a line of image data, to be read out from a storage unit, to another, depending on a position in the line in a scanning direction such that the curving of a scanning line is offset, and reducing trouble in reading out image data in units of rectangular image data blocks A data processing section performs image processing based on a plurality of rectangular image areas generated by dividing image data stored in a memory section. An image reading unit reads out the image data as the rectangular image areas, and transfers the rectangular image areas to the data processing section. A printer section forms an image by scanning a photosensitive member with irradiation light based on the rectangular image data areas. A DMA controller stores positional information indicative of line-switching positions. The rectangular image data areas are read out according to the positional information.

Abstract: 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.

Abstract: An image forming apparatus including a laser scanner configured to irradiate a photoconductive drum with light and having a cover glass transmitting the light, a laser shutter movable between a closed position, where the laser shutter blocks an optical path of the light emitted from the laser scanner through the cover glass toward the photoconductive drum, and an open position, where the laser shutter opens the optical path, and a cleaning member with which the cover glass is cleaned, the cleaning member being supported by the laser shutter in such a manner as to be movable along the laser shutter.

Abstract: Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam to create scan lines of a latent image in opposite directions. A damping of the motion occurs per air density implicated by temperature and pressure, where the pressure changes occurring especially from altitude changes. During use, a drive signal, such as a pulse train, moves the galvanometer or oscillator at or near its resonant frequency. Based on a parameter of the drive signal, such as pulse width, the ambient pressure can be made known. In general, a high-pressure environment requires a relatively longer pulse width to resonate the galvanometer or oscillator in comparison to a shorter pulse width for a low-pressure environment. Corrections to print quality stem from the determined ambient pressure.

Abstract: An image forming apparatus having an image bearing member, an optical print head to irradiate the image bearing member with light to form a latent image thereon, a developing device to develop the latent image with a developing agent to obtain a visual image, and front and rear plates that sandwich at least the image bearing member and the developing device from opposite directions to position at least the image bearing member and the developing device thereof, the plates having focus direction position determining reference surfaces and sub-scanning direction position determining reference surfaces the optical print head contacts to position the optical print head.

Abstract: A scanning unit in an image forming apparatus includes a light source, a coupling lens, an aperture, an image forming lens, and a polygon mirror. The light source includes a plurality of surface-emitting lasers. The coupling lens, the aperture, and the image forming lens are arranged on the optical path of light beams emitted by the light source. The polygon mirror deflects light beams of an image formed by the coupling lens towards a photosensitive drum for scanning. The focal length of the image forming lens in a sub-scanning direction is set to be equal to or smaller than an optical path length between the image forming lens and the aperture.

Abstract: An optical scanner includes: a light source that emits plural laser-beams; a deflecting section that deflects the laser-beams; a first optical-element that reflects the laser-beams deflected at the deflecting section and converges the laser-beams in a slow-scanning direction, and that can adjust positions, in the slow-scanning direction, of the laser-beams that the first optical-element reflects; a second optical-element that converges, in the slow-scanning direction, the laser-beams reflected at the first optical-element, and that can adjust scan line tilt of the laser-beams that the second optical-element reflects; and a planar reflecting member provided on an optical path between the first and second optical-elements, and reflects, toward the second optical-element, the laser-beams converged in the slow-scanning direction, the reflecting member having an adjusting mechanism that can adjust an angle of incidence in the slow-scanning direction of the laser-beams that are incident on the second optical-elemen

Abstract: A light-emitting chip includes: a substrate; plural light-emitting elements arrayed in line on the substrate, each of the light-emitting elements including a light-emitting region having a length in an array direction of the array different from a length in a direction orthogonal to the array direction; and a light-up current supplying interconnection including plural connecting portions, each of the connecting portions being provided on the light-emitting region of a corresponding one of the light-emitting elements in a shorter direction of the light-emitting region either the array direction or the direction orthogonal to the array direction, each of the connecting portions being connected to an electrode provided on the light-emitting region, the light-up current supplying interconnection supplying a current for lighting up to the plural light-emitting elements through the plural connecting portions.

Abstract: An optical scanning device includes a housing, the interior of which is partitioned into a first compartment and a second compartment by a base; a light source arranged in the first compartment and adapted to emit a beam; a first optical component arranged on an optical path of the beam in the first compartment; a second optical component arranged on the optical path of the beam in the second compartment; an aperture formed in the base to allow the beam to pass from the first compartment to the second compartment or from the second compartment to the first compartment; and a reinforcing member for reinforcing the rigidity of the base near the aperture.

Abstract: In an optical scanning device, when pixel density is taken to be n, number of the light beams is taken to be b, and number of the deflection surfaces of a deflecting unit is taken to be p, a spatial frequency S denoted by S=1/(1/(25.4/n×b×p) is within a range of a spatial frequency characteristic for a visual perception system of a high relative luminous efficiency. When spacing between ends in a sub-scanning direction of a scanning line formed by one scan by the deflection unit is taken to be L1, and spacing between all progressive scanning lines at the surface to be scanned is taken to be L2, then L1>(k?1)×L2 is satisfied, where k is a total number of light emitting points of a light source.

Abstract: 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 ref

Abstract: A light source device includes a light source, a coupling lens, a first opening plate, a second opening plate, a photoreceptor, a package member, a cover glass, a half mirror, and a light source control device. In relation to a main-scanning corresponding direction and a sub-scanning corresponding direction, divergence angles ?m and ?s of a light beam output from the light source, emission angles ?m1 and ?s1 of a light beam passing through an opening portion A, and emission angles ?m2 and ?s2 of a light beam passing through an opening portion B satisfy relationships |(?m1??m2)/?m|?0.085 and |(?s1??s2)/?s|?0.085.

Abstract: An optical scanning device cover, covering an upper portion of an optical scanning device, includes an exposure window, a close stopper, an open stopper, and a rotation cam plate. A projection to be held in a link portion of a rotation cam is fixedly provided on a shutter. When the rotation cam is rotated in a direction of an arrow R(1) from a state in which the shutter is closed, A-side of the shutter turns until the shutter comes into contact with the open stopper to open that side of shutter, and thereafter, the B-side of the shutter turns to open that side of the shutter.

Abstract: An optical beam is selectively output towards a scanner in accordance with image data for a scan line of an image. The optical beam has a beam irradiance distribution that is elliptical in shape. The optical beam passes through an aperture stop, ordinarily creating side lobes within a focus irradiance distribution of the optical beam. The scanner scans the optical beam to form the scan line on a photosensitive surface by selectively exposing positions along the scan line in accordance with image data. The optical beam is modified before it reaches the photosensitive surface to substantially remove the side lobes that have been created within the focus irradiance distribution and/or to substantially prevent the side lobes from being created within the focus irradiance distribution of the optical beam.

Abstract: A light-amount detecting device includes: a light source which emits a light beam; a branching optical element which divides the light beam emitted from the light source into a first light beam traveling in a predetermined direction and a second light beam traveling in a direction different to the predetermined direction; a light-condensing element which condenses the second light beam; a light-receiving element having a light-receiving surface which receives the second light beam condensed by the light-condensing element; and a detector which detects a light-amount of the second light beam received by the light-receiving element, and at least one of a direction of reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element and spread of the reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element is adjusted to control a light-amount of the reflected light of the second light beam returning to the

Abstract: 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.

Abstract: The exposure apparatus is provided with: a substrate; plural light emitting elements that are arranged in a line on a first surface of the substrate; and a heating unit that heats the substrate from the first surface side.

Abstract: An optical device includes at least one surface emitting laser device having a dielectric film for causing a central portion of a light emitting region to have a comparatively higher reflectivity than a peripheral portion; a light receiving element disposed, with respect to a first direction, on one side to the surface emitting laser device; and a transparent member disposed in a path of light emitted from the surface emitting laser device and configured to reflect a portion of the light toward the light receiving element as monitoring light. The central portion has shape anisotropy in which a width measured on a line extending in the first direction and passing through the center of the light emitting region is smaller than a width measured on a line extending in a second direction, which is perpendicular to the first direction, and passing through the center of the light emitting region.

Abstract: An optical scanning characteristic control method is applied to an optical scanning system in which a beam is deflected, and the deflected beam is converged and directed toward a scanning surface, so that optical scanning of the scanning surface is performed by an optical spot formed thereon by the deflected beam. The method comprising the steps of a) disposing a beam deflection control device on the light path of the beam before it is incident on the scanning surface; and b) controlling a beam deflection amount of the beam deflecting device provide to an incident beam so as to control a scanning characteristic of the optical scanning.