Abstract: An image forming apparatus includes an image forming part, a scanner part to moving up and down with respect to the image forming part, and a pair of side walls located between the image forming part and the scanner part while facing each other, the pair of side walls including a fixed side wall supported by the image forming part and a lifting side wall to moving up and down with respect to the fixed side wall and supported by the scanner part.

Abstract: An optical head comprises a substrate on which optical elements are arranged in a main scanning direction, a lens unit that transmits light emitted from the optical elements or light entering the optical elements, and a holder that holds the lens unit. The holder has a sidewall extending in the main scanning direction. The sidewall has a hole at a position facing the lens unit. A fixing member is provided in the hole. The fixing member fixes the lens unit to the sidewall.

Abstract: A vacuum pump comprises: a rotor; a stator; a rolling bearing configured to support a rotor shaft provided at the rotor; and a vibration sensor configured to detect vibration of the rolling bearing.

Abstract: A light emitting device includes a light emitting unit in which a resin housing extending in one direction holds a light emitting element emitting light in a light emitting direction intersecting the one direction, a suppressing member that extends in the one direction and suppresses deformation of the housing caused by heat, the suppressing member having a linear expansion coefficient different from a linear expansion coefficient of the housing, and a fixing portion that fixes the housing and the suppressing member to each other at a position overlapping, in the light emitting direction, a neutral axis of the housing or the light emitting unit or a neutral axis of the suppressing member in the light emitting direction, at plural places separated away from each other in the one direction or in a state of extending in the one direction.

Abstract: A cleaning member that is used in an image forming apparatus and that is inserted from outside the image forming apparatus, the apparatus including a holding body that holds a substrate on which light emitting elements that expose a photosensitive drum are aligned and that holds lenses, the cleaning member including a rod-shaped rhabdoid formed of resin, a cleaning portion provided in the rhabdoid to clean a light emission surface of each lens, the cleaning portion moving together with the rhabdoid inserted in the image forming apparatus and opposing the light emission surface in an optical axis direction of the lens, and a magnet provided on the rhabdoid, the magnet emitting magnetic force that generates force drawing the holding body thereto so that the cleaning portion continues to contact the light emission surface.

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

Abstract: Provided are systems and methods for analyte detection and analysis. A system can comprise an open substrate. The open substrate may be configured to rotate or otherwise move. The open substrate can comprise an array of individually addressable locations, with analytes immobilized thereto. The substrate may be spatially indexed to identify nucleic acid molecules from one or more sources, and/or sequences thereof, with the respective one or more sources. A solution comprising a plurality of probes may be directed across the array to couple at least one of the plurality of probes with at least one of the analytes to form a bound probe. A detector can be configured to detect a signal from the bound probe via scanning of the substrate while minimizing temperature fluctuations of the substrate or optical aberrations caused by bubbles.

Abstract: A cleaning member for use in an image forming apparatus and configured to be inserted into the apparatus, the apparatus comprising a holding body that holds a substrate and lenses, the cleaning member comprising a rod, a cleaning portion provided in the rod to clean a light emission surface of each lens, a magnet attached to the rod, the magnet emitting a magnetic field to generates a magnetic force to draw the holding body thereto so that the cleaning portion maintains contact with the light emission surface, a yoke member attached to the rod and in contact with the magnet. The yoke member is configured to protrude, with respect to the magnet, towards a side on which the holding body is disposed, and a contact portion that is configured to contact the holding body and that to protrude, with respect to the yoke member, towards the above side.

Abstract: A vehicle, a satellite control system, and a method for controlling the same are provided. The satellite control system, for example, may include, but is not limited to, a control moment gyroscope having a gimbal, at least one gimbal angle sensor configured to determine an angle of the gimbal, each gimbal angle sensor having an output circuit configured to output the determined angle, a signal conditioner circuit having substantially identical circuit topology as the output circuit, and a common mode error compensation circuit electrically coupled to the signal conditioner, the common mode error compensation circuit configured to determine common mode error in the gimbal angle sensor based upon a voltage output from the signal conditioner circuit and to output a signal to compensate for the common mode error.

Abstract: There is provided an image reading apparatus including: a reading device; a carriage which the reading device is loaded; a support shaft which is formed of a conductive material, which is grounded to a ground potential, and which supports the carriage; and a conduction member which allows a conductive part of the carriage and the support shaft to be electrically conducted to each other, in which the carriage includes a bearing section which is formed of a material having electric insulation properties, in which the bearing section is supported by the support shaft in a state of abutting against the support shaft from one side of the support shaft in a direction intersecting with a shaft line of the support shaft, and in which the conduction member is fixed to the carriage, and abuts against the support shaft from a side opposite to the support shaft.

Abstract: The length of an abutting pin of an optical print head is decided such that the upper end of the abutting pin when at a cleaning position is on the opposite side of a movement path of a cleaning member, from the upper end of another abutting pin of the optical print head when in an exposure position.

Abstract: An exposure device according to one or more embodiments may include a board on which light emitting elements are arranged; an optical system disposed opposite to the board; and a support member which supports the board and the optical system. The exposure device may further include a cured body disposed on the support member and including a board contact surface to come into contact with the board.

Abstract: An optical scanning apparatus includes a polygonal mirror configured to deflect a light beam emitted from a light source such that the laser beam scans a member to be scanned, a drive motor configured to rotate the polygonal mirror, aboard on which the polygonal mirror and the drive motor are mounted, an installation portion where the board is installed, a rubber member provided between the board and the installation portion, and an adjustment unit configured to position on the board with respect to the installation portion and to adjust inclination of the board with respect to the installation portion by deforming the rubber member.

Abstract: To prevent solidification of molten elastic material before an elastic member is formed, and improve dust-proof capabilities of a housing. Included are an opening 104a, dust-proofing glass 105, an elastic members 107 to close off a gap between the dust-proofing glass 105 and a cover member 104, an inlet 104d for pouring in molten elastic material when forming the elastic member 107, and a channel 104e through which the molten elastic material poured in from the inlet 104d flows to form the elastic member 107. When the molten elastic material is poured in from the inlet 104d and flows through the channel 104e to form the elastic members 107, the cross-sectional area of the elastic member 107 in the lateral direction of the openings 104a closer to the inlet 104d is larger than the cross-sectional area of the elastic member 107 in the lateral direction farther from the inlet 104d.

Abstract: Disclosed is a print head adjustment device (1) for an inkjet printer. The print head adjustment device includes an adjustment adapter (4) and a print head (3) that has a printing side (6) extending on an X-Y plane. The adjustment adapter (4) includes a receiver (20) which is adjustable in the X-Y plane and in which a stationary end (9) of the print head (3) is accommodated. A movable end (8) of the print head (3) is mounted on the adjustment adapter (4) so as to be slidable in the X direction and rotatable about an axis of rotation that is perpendicular to the X-Y plane.

Abstract: An optical scanning device includes a light source configured to emit a light beam; a rotary deflector configured to perform optical scanning by reflecting and deflecting the light beam emitted from the light source while rotating; an optical system forming member configured to form a path of the light beam; and a resonator having a resonance frequency corresponding to a sound generated by rotational drive of the rotary deflector. The rotary deflector is installed in a closed space. The resonator is installed so that the sound within the closed space is absorbed.

Abstract: An image forming apparatus includes an optical scanning device and one or more second driving motors. The optical scanning device includes a polygon mirror, an optical scanning system for forming an image of the beam light on a surface to be scanned, a folding mirror for returning the beam light so as to be led to a photosensitive drum, and a housing. The housing is provided with a first support portion, a second support portion, and a third support portion for supporting the reflective surface of the folding mirror. When a distance between the first support portion and the second support portion is set to L, the third support portion is disposed at the first support portion side from a position of L/4 in a direction of the second support portion from the first support portion and is disposed at the second support portion side from the first support portion.

Abstract: An image forming apparatus is provided. The image forming apparatus includes: plural photosensitive members; plural exposing units opposed to the photosensitive members, respectively, each of the exposing units including a plurality of light emitting elements arranged in a first direction; and a body frame which is provided at both sides of the exposing units in the first direction. Each of the exposing units includes: a gap maintaining member which abuts a respective one of the photosensitive members to define a distance between the exposing unit and the photosensitive member; a first-direction positioning portion which abuts the body frame in the first direction to position the exposing unit in the first direction; and a second-direction positioning portion which abuts the body frame in a second direction perpendicular to the first direction and an exposing direction of the light emitting elements, to position the exposing unit in the second direction.

Abstract: An exposure device includes an exposure member, a positioning member, and a movement restricting member. The exposure member includes multiple light-emitting devices arranged along a first direction, which is an axial direction of an image carrier that rotates. The exposure member exposes the image carrier to light by emitting light in a second direction, which is a direction from the multiple light-emitting devices to the image carrier. The positioning member determines a position of the exposure member in the second direction relative to the image carrier by causing the exposure member to abut against the image carrier in the second direction. The movement restricting member is disposed on an end portion of the exposure member in the first direction and restricts movement of the exposure member relative to the positioning member.

Abstract: An image forming apparatus, which includes a main frame having an opening, a cover rotatable between an opened position where the cover uncovers the opening and a closed position where the cover closes the opening, a holder rotatably supported by the cover and having a recess, and an exposure unit having a plurality of light emitting elements and a supporting wall, and held by the holder, the supporting wall having a first engaging portion which engages with the recess of the holder when the cover is located at the opened position, and which disengages from the recess of the holder when the cover is located at the closed position.

Abstract: A light scanning apparatus configured to irradiate a surface to be scanned with a light beam, including: a light source configured to emit the light beam; a deflector configured to deflect the light beam to scan the surface; an optical element configured to lead the light beam to the surface; a housing configured to hold the light source, the deflector, and the optical element, and including fibers; and a rib formed integrally with a bottom portion of the housing on which the deflector and the optical element are disposed, the rib standing on the bottom portion between the deflector and the optical element to suppress a deformation of the housing in a scanning direction, wherein the fibers of the rib are oriented along the scanning direction, and the fibers of the bottom portion are oriented along the bottom portion and in a direction perpendicular to the scanning direction.

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 oscillation element according to the present invention includes a torsion bar mounted on a base, and an oscillating member having a light reflection surface for reflecting light from a light source, which is fixed on the torsion bar protruding from the base. The oscillating member oscillates about a longitudinal axis of the torsion bar with an elastic deformation of the torsion bar, thereby deflecting the light that reflects at the light reflection surface in a direction intersecting the longitudinal axis. The oscillating member has two plates that are joined together so as to sandwich the torsion bar. On joining surfaces of the plates are provided with grooves for receiving the torsion bar, respectively. The plates have a symmetrical shape that the longitudinal axis serves as the axis of symmetry.

Abstract: An optical scanner includes a housing, a polygon mirror accommodated within the housing and configured to reflect light of a light source, a lens accommodated within the housing and arranged on an optical path of the light reflected by the polygon mirror, and a cover member. The cover member is mounted to the housing and is provided with an opening formed so as to expose at least a portion of the lens. The opening is closed by a seal member which is attached to a portion of the lens exposed from the opening and an outer wall surface of the cover member existing around the opening.

Abstract: The oscillation element according to the present invention includes a torsion bar mounted on a base, and an oscillating member having a light reflection surface for reflecting light from a light source, which is fixed on the torsion bar protruding from the base. The oscillating member oscillates about a longitudinal axis of the torsion bar with an elastic deformation of the torsion bar, thereby deflecting the light that reflects at the light reflection surface in a direction intersecting the longitudinal axis. The oscillating member has two plates that are joined together so as to sandwich the torsion bar. On joining surfaces of the plates are provided with grooves for receiving the torsion bar, respectively. The plates have a symmetrical shape that the longitudinal axis serves as the axis of symmetry.

Abstract: A fixing structure for fixing an optical element at a predetermined position in an optical device, the fixing structure has a plurality of first pressing members to fix the optical element at at least two positions on a surface of the optical element orthogonal to an optical axis of the optical element and a second pressing member to fix the optical element at a predetermined position on a surface of the optical element to the optical axis. A depth of pressing of the surface of the optical element by a tip of the second pressing member is larger than the depth of pressing of the surface of the optical element by the tips of the first pressing members.

Abstract: A light scanning includes an adjusting unit that displaces the optical member to adjust the optical axis of the laser beam. The adjusting unit includes a shaft portion, a shaft supporting portion, a turning portion, a driving portion, and a turning damping unit. The shaft portion is configured to bidirectionally move in a first direction and in a second direction while turning. The first direction is a direction where the shaft portion approaches the optical member. The second direction is a direction where the shaft portion moves away from the optical member. The shaft supporting portion supports the shaft portion, and moves the shaft portion in accordance with turning of the shaft portion. The turning portion turns the shaft portion. The driving portion turns the turning portion. The turning damping unit damps a turning force applied to the shaft portion by an external force.

Abstract: A light scanning unit and an electrophotographic image forming apparatus are provided. The light scanning unit includes a light source unit for emitting a light beam, a light deflector for scanning and deflecting the light beam, an imaging optical system having an imaging lens for imaging the scanned and deflected light beam, and first and second reflection members arranged on an optical path, a housing, and first and second assembly members for pressing and fixing the first and second reflection members on the housing. The assembly members press and fix the reflection members on the housing by pressing the reflection members in a direction in which curvature of a scanning line due to the inclination of the first reflection member and curvature of a scanning line due to the inclination of the second reflection member are offset with each other.

Abstract: An optical scanning device includes an optical element and an optical base. The optical element includes a first bonding surface, while the optical base includes a second bonding surface. A groove in which a bonding agent flows is formed in at least one of the first bonding surface of the optical element and the second bonding surface of the optical base. The optical element is bonded and fixed to the optical base through the first bonding surface and the second boding surface by means of the bonding agent.

Abstract: An optical scanning device includes a plurality of stations, each of which includes an light source, a deflector (polygon scan), a scanning optical element, and a housing. The light source emits a light beam to a plurality of surfaces to be scanned. The deflector deflects light beams emitted from the light source. The scanning optical element scans the surfaces to be scanned with light spots of the optical beams deflected by the deflector. The housing houses therein the light source, the deflector, and the scanning optical element. The scanning optical element is secured to the housing so that directions of scanning-line curves caused by temperature change match between the surfaces to be scanned.

Abstract: An optical scanning apparatus capable of fixing an optical member using a plate spring without forming a die cut hole and thus having high dust-proof performance includes a mirror supporting portion supporting a reflection mirror, and a projecting portion configured to form a gap between the reflection mirror supported on the mirror supporting portion and itself, and to deform the plate spring with the reflection mirror, and the projecting portion is provided with a cut hole for engaging the plate spring.

Abstract: If inclination correction of scanning line is performed while the incident position of the laser beam is not suitable, the shape of a spot of the laser beam which forms an image on a photosensitive drum may not be uniform depending on the scanning position of the laser beam. The housing is provided with a U-shaped groove to which the convex portion of a lens hold member that holds the lens is engaged. With the position of the convex portion adjusted, the convex portion is attached and secured in the U-shaped groove. Thus, the installation position of the lens to an optical path of the laser beam is adjusted, and the lens can be rotated and adjusted in order to correct an inclination or a bending of scanning line.

Abstract: An image forming apparatus having a light scanning unit including a light source to emit a light beam; a deflector to deflect the light beam in a main scanning direction; an imaging lens to focus the light beam deflected by the deflector onto a photoconductor; at least one reflecting element to reflect the light beam that has passed through the imaging lens; and a bow control apparatus to correct a bow of a scanning line of the light beam, the bow control apparatus comprising first and second support units to support the reflecting element, first and second pressure units to pressure an inside and an outside of the reflecting element, respectively, and first and second adjusting elements to adjust the amount of pressure of the first and second pressure units, the bow control apparatus convexly or concavely bows the reflecting element to correct an image bow of a scanning line of the light beam.

Abstract: A light scanning apparatus, including: a light source configured to emit a light beam; a beam splitter configured to split the light beam into a first and a second light beams; a rotary polygon mirror configured to deflect the first light beam to scan a photosensitive member; a motor configured to rotate the rotary polygon mirror; a first lens configured to guide the first light beam to the photosensitive member; an optical sensor configured to receive the second light beam; a second lens configured to condense the second light beam on the optical sensor; and an optical box has a wall standing from a bottom surface between a region in which the rotary polygon mirror and the motor are disposed and a region in which the second lens is disposed, and a height of the wall from the bottom surface is higher than a height of the rotary polygon mirror.

Abstract: An optical scanning device includes a rotating body having a rotating polygon mirror that deflects a light beam; a circuit board having a supporting member that supports the rotating member and a driving unit that drives the rotating body; a container containing the rotating body and the circuit board and having a positioning portion that positions a positioned portion of the rotating body, the positioned portion projecting from the circuit board; first and second fastening portions that fasten the circuit board to the container; and an adjusting portion that adjusts an angle of a rotating shaft of the rotating body with respect to the container. A virtual straight line connecting the first and second fastening portions passes through the rotating body when seen in an axial direction of the rotating shaft. The adjusting portion resides on a side of the virtual straight line opposite the rotating shaft.

Abstract: An optical device includes a surface-emitting laser array having a plurality of light-emitting portions; a package member on which the surface-emitting laser array is disposed; and a transparent member retained on the package member and disposed on an optical path of a light beam emitted by the surface-emitting laser array. The transparent member includes an incident plane on which the light beam emitted by the surface-emitting laser array is incident. The incident plane is inclined with respect to an emitting surface of the surface-emitting laser array at a first inclination angle which is smaller than a second inclination angle at which the light emitted by one of the light-emitting portions is incident on another, most-distant one, of the light-emitting portions via reflection by the transparent member.

Abstract: An exposure device to expose an exposure element includes a light source; an optical system to guide light emitted from the light source to the exposure element; and an optical housing, configured with a plurality of plates, to support the light source and the optical system. At least one of the plurality of plates configuring the optical housing is formed with a plurality of grooves on each of a first face and a second face with a given pitch on the one of the plurality of plates, the first face and the second face being opposite faces with each other. The plurality of grooves are arranged by shifting the center of each of grooves formed on the first face and the center of each of grooves formed on the second face.

Abstract: An image forming apparatus, including: an image bearing member; a latent image forming unit configured to emit a light beam based on image data and to form an electrostatic latent image on the image bearing member by the light beam; a placement unit provided in a main body of the image forming apparatus, on which the latent image forming unit is placed; an elastic member disposed between the latent image forming unit and the placement unit; and a pressing unit provided in the main body of the image forming apparatus and configured to press the latent image forming unit toward the placement unit so that the elastic member is pressed by the latent image forming unit and the placement unit.

Abstract: A housing for the scan unit printhead of an imaging device. The housing is substantially bowl shaped having a plurality of mounting surfaces extending inwardly toward a central region of the housing. The housing is constructed from a metal composition. The scan unit includes a plurality of light sources and an optical assembly operatively coupled thereto. The housing mounting surfaces support components of the optical assembly using an adhesive, without additional mounting hardware.

Abstract: An attachment mechanism of an optical scanner includes a supporting structure with an opening and a fixing member. The fixing member positions and fixes the optical scanner with a positioning boss held by the opening. The fixing member includes an annular part having an outer circumference face fitted in the opening and an internal circumference face fitted on the positioning boss. One of the internal circumference face and an outer circumference face of the positioning boss includes a projection and another includes a depression for insertion of the projection. A top face of the projection and/or a bottom face of the depression slope(s) slanted from the circumference. By inserting the positioning boss in the opening, fitting the annular part in the opening, and turning the fixing member to narrow a gap between the top face and bottom face, the optical scanner is fixed to the supporting structure.

Abstract: In an exposure device, a light source device having multiple light emitting devices arranged in one-dimensional or two-dimensional directions projects light against an image bearing member. A light source holding member holds the light source device in place. An optical device condenses the light projected from the light source device onto the image bearing member. An optical device holding member holds the optical device to maintain a predetermined gap between the optical device and the light source device on the light source holding member. A positioning member supports the light source holding member above the image bearing member to maintain a predetermined gap between the image bearing member and the light source device on the light source holding member. When seen from a light emitting point of the light source device, a position at which the positioning member supports the light source holding member is opposite the image bearing member.

Abstract: An optical scanner includes a housing, a light source, a polygon mirror, an optical device, and a holder. The housing includes a mounting portion. The light source projects light. The polygon mirror is enclosed within the housing and rotates to deflect the light projected from the light source. The optical device is disposed substantially near the polygon mirror. The holder is disposed within the housing and attached to the housing at the mounting portion, and holds the optical device in place. A distance L1 between a center of rotation of the polygon mirror and the optical device is shorter than a distance L2 between the center of rotation of the polygon mirror and the mounting portion. An image forming apparatus includes the optical scanner.

Abstract: An image reading apparatus includes an array substrate in which a plurality of point light sources is mounted along the main scanning direction, a light guide member disposed on a surface of the array substrate that mounts the plurality of point light sources, and guiding light from the plurality of point light sources to the document surface, a frame for fixing the light guide member and the array substrate, a positioning unit that determines the positional relationship of the frame with the light guide member and the array substrate in a configuration in which the incident surface of the light guide member is in proximity to or in contact with the plurality of point light sources; and an image reading unit that uses reflected light when illuminating light from the plurality of point light sources through the light guide member onto the document surface to thereby read the document image.

Abstract: An optical writing unit includes in a housing a light source projecting a light beam, a deflector to deflect the light beam projected from the light source, a focusing lens, and a lens adjusting device. The focusing lens is long in a main scanning direction and focuses the light beam onto a scan target. The lens adjusting device rotates the focusing lens about a substantially center portion thereof as a rotation fulcrum on a plane perpendicular to an optical path of the light beam so as to adjust the position of the light beam illuminating the scan target. The focusing lens has an asymmetric cross-section relative to a center line of the focusing lens in a direction of the optical path in a sub-scanning plane perpendicular to the main scanning direction, and the center of gravity of the focusing lens is offset from the center line toward the rotation fulcrum.

Abstract: An optical scanning device includes an optical element, an optical base, a height positioning boss, and a bonding portion. The optical element is positioned on the optical base. The height positioning boss is provided in at least one of the optical element and the optical base and positions the optical element with respect to vertical orientation. The bonding portion is provided in at least one of the optical element and the optical base. A longitudinally central portion of the optical element is bonded to the bonding portion.

Abstract: An optical scanner includes a light source to project light, a light deflector to deflect light, an optical element, and a holder to hold an optical element in place. The holder includes a curve adjustment mechanism, a first pressing member, a second pressing member, and a retainer. The curve adjustment mechanism adjusts a shape of the optical element in a sub-scanning direction relative to a scanning surface and perpendicular to a main scanning direction. The first pressing member is disposed at a first side from which the first pressing member presses the optical element in the sub-scanning direction. The second pressing member is disposed at a second side opposite the first side, to press the optical element from the second side. The retainer fixes substantially a center of the optical element in a main scanning direction of the light striking the optical element to the first side.

Abstract: If an open-close lid is opened to perform cleaning for wiping the dirt off reflection surfaces of a polygon mirror, a service staff has difficulty in cleaning the reflection surfaces of the polygon mirror since the polygon mirror is located inside a housing. To respond to such an issue, a positional relationship between an installation position of the polygon mirror and an opening is set such that at least one of the reflection surfaces of the polygon mirror is exposed to the outside of the housing.

Abstract: An optical scanning apparatus includes a reflecting mechanism, a light receiving element and a restricting mechanism. The reflecting mechanism reflects a light beam such that the irradiation point of the light beam moves in a predetermined scanning direction. The light receiving element is arranged in a movement plane defined by the light beam reflected by the reflecting mechanism, and the light receiving element outputs a light reception signal for adjusting the irradiation timing of the light beam in accordance with reception of the light beam reflected by the reflecting mechanism. The restricting mechanism positions the light receiving element relative to the movement plane.

Abstract: An optical scanning device includes a housing, a light source that emits light, a rotatable polygon mirror that receives the light from the light source while rotating and deflects the light by reflecting the light in a direction corresponding to an angle of rotation thereof, a scanning optical system that guides the light from the rotatable polygon mirror to a scanning object in such a manner as to repeatedly scan the scanning object with the light, and an intermediate member that is provided between an optical member included in the scanning optical system and the housing. The intermediate member is connected to the optical member with rubber adhesive and is also connected to the housing with the rubber adhesive.

Abstract: A light source includes a plurality of light-emitting units arranged in a two-dimensional array. An optical element changes divergence angles of laser beams from the light-emitting units. A splitting element splits a part of each of the laser beams passing through the optical element. A compensating element compensates for a fluctuation in the divergence angle of each of the laser beams incident on the splitting element due to a change of temperature. A light-receiving element receives laser beams split by the splitting element. The light source, the optical element, the splitting element, the compensating element, and the light-receiving element are integrally supported.