Abstract: An exposure device includes a light emitting element; and an eccentric cam for adjusting a distance between the light emitting element and a light receiving member. The eccentric cam includes a shaft portion and a cam portion arranged eccentrically relative to the shaft portion. The cam portion includes a circumferential surface having a convex surface in an axial direction of the eccentric cam and a circular arc in a direction perpendicular to the axial direction.

Abstract: An aspect of the present invention is an LED print head grounding structure including: an LED print head that emits exposure light; a conductive member that is adjacent to one end and another end of the LED print head; a conducting portion that puts the one end of the LED print head and one end of the conductive member into electric conduction; and a grounding portion that grounds the other end of the LED print head and another end of the conductive member.

Abstract: An image forming apparatus includes: an image holder; an exposure member that has an exposure portion exposing the image holder; a first positioning unit that determines a distance in a first direction, which is a direction of an optical axis of the exposure member, between the exposure member and the image holder; and a second positioning unit that determines a position of the exposure member with respect to the image holder in a second direction being a direction of an axis line of the image holder, and a position of the exposure member with respect to the image holder in a third direction being perpendicular to both the first direction and the second direction, and that determines the distance between the exposure member and the image holder at a position substantially closer to the exposure member than the position of the first positioning unit.

Abstract: A method of pixelized image formation on a photosensitive surface, comprising: providing relative motion of the photosensitive surface relative to a multiplicity of light sources, such that pixels on the surface pass a plurality of said light sources; and exposing a plurality of the pixels of the surface to one or more, but fewer than the plurality, of said light sources, such that the exposure of the exposed pixels is the same.

Abstract: A light stabilizer used for an electronic device including a plurality of electronic parts including a light source, a main power source for supplying a drive current to the electronic parts, and a start button for the light source, wherein the light stabilizer comprises, a heating power source that supplies a heating current to the light source to make the light source self-heat in a non-light emitting state, and a control section that executes control so that after the main power source is turned on, the heating current is supplied to the light source firstly out of the plurality of electronic parts to increase temperature of the light source to the degree higher than dew point temperature, and when the start button is pressed down, the drive current is supplied to make the light source emit light.

Abstract: A light-emitting device includes: a substrate; a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at plural distances from the reflection layer. The surface is provided on a side opposite to the reflection layer across the light-emitting region. The plural distances are set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other.

Abstract: A method of adjusting an exposure device suited for an electrophotographic printer, the exposure device includes a plurality of light-emitting elements. The method includes the steps of energizing selected light-emitting elements according to a selection scheme, using a pre-determined energy level for energizing each selected light-emitting element and obtaining a corresponding exposure intensity distribution from the exposure device. The method further includes the steps of predicting a toner area coverage distribution, based on the obtained exposure intensity distribution and on a pre-established transfer function, obtaining an attribute of the predicted toner area coverage distribution and determining the setting values for the energy levels for energizing each selected light-emitting element such that the obtained attribute becomes a target attribute.

Abstract: A line head, includes: an element substrate that includes luminous element groups as groups of a plurality of luminous elements; and a lens array that includes lenses which have an optical property of inverting or non-unity-magnification, focus light from the luminous element groups to form spot groups on an image plane, and are provided corresponding to the respective luminous element groups, wherein the plurality of luminous elements are two-dimensionally arranged in point symmetry in each luminous element group, a plurality of spots are formed as the spot group when the respective luminous elements of the luminous element group emit light, and an inter-point distance between an intersection of a line extending from a symmetry center of the luminous element group in an optical axis direction of the lens with the image plane and a center of gravity position of the spot group is shorter than a specified distance.

Abstract: A line head includes: a first substrate that includes light-emitting elements formed thereon; and a second substrate that includes focusing lenses, which are inverted optical systems, focusing light emitted from the light-emitting elements, and has a linear expansion coefficient that is smaller than that of the first substrate.

Abstract: Differing ratios of the amount of light from light source LD2 to the amount of light from light source LD1 are provided. An image pattern for adjustment that includes, for each color, an area made up of isolated dots by light source LD1 and an area made up of isolated dots by light source LD2, is printed for each ratio. In a copier, a density of each area is detected, a ratio at which a difference between the density of an area of isolated dots by light source LD1 and the density of an area of isolated dots by light source LD2 is smallest is decided as an adjustment ratio, and control is performed such that light sources LD1 and LD2 emit light at the adjusted ratio.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a latent image carrier on which a latent image is formed, a line head that exposes the latent image carrier, and a developing section that develops the latent image. The line head includes a substrate, a light emitting element disposed on the substrate in a first direction, and a wiring installed on the substrate so as to be withdrawn from one end of the substrate in a second direction perpendicular to or substantially perpendicular to the first direction. The one end is disposed to be the developing section side.

Abstract: A line head includes first to third light-emitting elements arranged in a first direction; and an optical system that forms images by light emitted from the first to third light-emitting elements on an imaging surface to form images of the light-emitting elements, in which the first light-emitting element is arranged between the second light-emitting element and the third light-emitting element in the first direction; the optical system has a first lens surface that has refractive power and is arranged so as to satisfy a relation of H>0.

Abstract: A printing apparatus (100) for printing digital images onto a photosensitive medium (140) employing, for exposure energy, a light source (20) that uses various arrays of LEDs (32). The printing apparatus (100) may form the print image using sequential modulation, one color at a time, or by applying all colors simultaneously. Arrangements of discrete LEDs (32) may include high-intensity devices configured with collector cones (41) arranged as a multicone structure (141), with parabolic reflectors (65), or collimating lenses (36). Large area LEDs (46) may alternately be used, arranged on an angled mounting surface (64), for example.

Abstract: Provided is an exposure head, including: an array substrate having a plurality of organic EL elements arranged in an array on one face; and a plurality of circuit chips having a circuit for driving the organic EL element, and in which the forming face of the circuit is serially arranged along the extending direction of the array substrate so as to face one face of the array substrate; wherein the plurality of circuit chips are mutually serially connected by providing a pair of wiring groups for each mutual boundary location of the circuit chips on one face of the array substrate and outside the arrangement area of the organic EL element, bump-bonding one of the adjacent circuit chips to one end of the pair of wiring groups, and bump-bonding the other adjacent circuit chip to the other end of the pair of wiring groups.

Abstract: An image forming apparatus includes a line head that performs exposure on a latent image carrier to form a latent image. The line head includes first and second light-emitting elements arranged in a first direction; and an optical system that images light emitted from the first and second light-emitting elements. When a difference between the maximum and minimum values of a longitudinal aberration of the optical system is G, a distance in the first direction between centers of geometry of the first and second light-emitting elements is Pel, and an optical magnification of the optical system is ?, a relation of G>|?|·Pel is satisfied.

Abstract: An image forming unit is provided in which, through making a distance limiting member to limit a distance between an exposing unit and an image carrying body be able to contact and separate with respect to the image carrying body by a contact/separation enabling section, it is eliminated that developer remaining on the surface of the image carrying body coagulates on the distance limiting member, so it is eliminated that the surface of the image carrying body is scraped by the developer, and that a bad print occurs. The image forming unit has an image carrying body exposed by an exposing unit, a distance limiting member to limit a distance between the exposing unit and the image carrying body. The distance limiting member is installed capable of contacting with and separating from the image carrying body by a contact/separation enabling section.

Abstract: A line head includes light-emitting elements arranged in a first direction; and an optical system that images light emitted from the light-emitting elements on a latent image carrier. The optical system including first and second lens surfaces having refractive power, the second lens surface being provided on a side of the first lens surface opposite to the light-emitting elements. In cross sections in the first and second directions including an optical axis of the optical system, the curvatures of the first and second lens surfaces satisfy the following relationships: |C1X|<|C1Y|; and |C2X|>|C2Y| where, |C1X| and |C2X| are absolute values of the curvatures on the optical axis of the first and second lens surfaces on the cross section in the first direction, respectively; and |C1Y| and |C2Y| are absolute values of the curvatures on the optical axis of the first and second lens surfaces on the cross section in the second direction.

Abstract: A lens array, includes: a plurality of lens substrates which include a plurality of lenses arranged in a first direction; and a support member which supports the plurality of lens substrates arranged in the first direction.

Abstract: A drive circuit for supplying a drive current to a plurality of driven elements includes a plurality of drive output terminals to be connected to the driven elements. The drive output terminals are arranged with a specific pitch in between in an arrangement direction. The drive circuit further includes a plurality of drive transistors. Each of the drive transistors is arranged in an occupied area with a specific width in the arrangement direction larger than the specific pitch.

Abstract: A line head, includes: a substrate which is transmissive and includes a first surface and a second surface facing the first surface; a plurality of light emitting elements which are arranged on the first surface of the substrate and emit light beams; a wiring which is arranged on the first surface of the substrate and is connected with the plurality of light emitting elements; a lens array that includes a plurality of imaging lenses which are arranged facing the light emitting elements at a side of the second surface of the substrate and focus the light beams emitted from the facing light emitting elements to form spots; and an optical sensor which detects the light beams emitted from the light emitting elements and is arranged on the second surface of the substrate.

Abstract: An exposure device includes a substrate on which a light emitting element array is provided, a focusing lens that focuses light emitted by the light emitting element array, a supporting member that supports the substrate and the focusing lens. The supporting member has a contact surface. A base is provided for forcing the substrate against the contact surface of the supporting member. The base has a first engaging portion that engages a second engaging portion formed on an inner wall of the supporting member. The base is mounted to the supporting member by the engagement of the first engaging portion and the second engaging portion.

Abstract: An image forming apparatus includes an electrostatic latent image carrier, and an optical writing device including at least one light source, at least one aperture, at least one light shield, a light deflector, an image forming lens, and a housing. The aperture adjusts a light beam generated by the light source into a reference shape. The light shield shields an optical path formed between the light source and the aperture by the light beam. The light deflector deflects the light beam to scan in a main scanning direction. The image forming lens focuses the deflected light beam to scan on the surface of the electrostatic latent image carrier to form an electrostatic latent image on the surface of the electrostatic latent image carrier. The housing contains the light source, the light deflector, and the image forming lens. The housing is integrally molded with the aperture and the light shield.

Abstract: A lens array, includes: a clear substrate; and a plurality of plastic lens substrates each of which includes a plurality of lenses and which are arranged on at least one of surfaces of the clear substrate.

Abstract: A line head includes a lens array having a plurality of positive lens systems in a first direction. Each positive lens system has a pair of lenses with positive refractive power. A light emitter array disposed on an object side of the lens array has a plurality of light emitting elements disposed corresponding to the positive lens systems. An aperture plate forms an aperture stop on the object side of the pair of lenses. A focal distance f1 of one of the pair of lenses disposed on the object side satisfies the conditional formula f1?d0/(1+W0/D1).

Abstract: An optical scanning apparatus includes a plurality of light sources capable of emitting light. A detection unit detects a light quantity of the light emitted from the plurality of light sources. A control unit controls drive current of a light source designated as a control object based on a detection result obtained by the detection unit. The control unit controls the drive current based on an activation state of the light source designated as the control object and an activation state of a light source other than the control object.

Abstract: An exposure apparatus comprises: a plurality of light sources; a first condensing unit, arranged to contact a light emitting surface of each of the light sources, that condenses the lights emitted from the plurality of light sources; and a second condensing unit that condenses the lights from each of the light sources, which are emitted from the first condensing unit, wherein the first condensing unit is configured so that a center of curvature of an output surface, to emit the light from the light source, of the first condensing unit is positioned near the side of the second condensing unit rather than an arrangement position of the light source.

Abstract: An optical write line head includes multiple rows of light emitter devices lined up corresponding to respective positive lenses located in array form, wherein even with a fluctuation of its write plane in an optical axis direction, there is none of variations resulting from displacements of light emitting dots. A plurality of light emitter blocks, each including at least one row of light emitter devices lined up in a main scan direction, are located at a spacing in the main scan direction to define a light emitter array. On the exit side of the light emitter array, a lens array including one positive lens system in alignment with each light emitter block is located parallel with the light emitter array, and a write plane is located parallel on the imaging side of the lens array. A stop plate forming an aperture stop is located near a light-gathering position at which parallel light incident from the write plane side on each positive lens system comes together.

Abstract: An image forming apparatus includes light source having multiple light-emitting portions, rotating polygonal mirror which deflects a beam that is emitted from light source, and photosensitive member which is exposed by beams in an image period that is included in one scanning cycle of the beam. One scanning cycle of the beam includes an image period and a non-image period. This apparatus includes selection unit which selects one or more light-emitting portions to be used in image period from among multiple light-emitting portions, and driving unit which drives selected light-emitting portions to emit a beam in a non-image period that is immediately before image period. This apparatus further includes control unit which executes auto light power control for one or more light-emitting portions to be used in image period according to light power of beams detected by beam detection unit.

Abstract: The light-emitting element head is provided with: plural light-emitting element chips in each of which light-emitting elements are arrayed in a line; a lighting signal supply unit supplying lighting signals for setting whether or not the light-emitting elements emit light, each of the lighting signals being provided in common to the light-emitting element chips that belong to one of N groups into which the plural light-emitting element chips are divided, where N is an integer of 2 or more; and a clock signal supply unit supplying a first clock signal as a transfer signal for causing the light-emitting elements to sequentially emit light, and second clock signals for setting the light-emitting elements ready to emit light, the second clock signals being different from one another, being supplied to the respective light-emitting element chips belonging to the one of the N groups, and being supplied in common across the N groups.

Abstract: A control method for controlling an optical head having a plurality of light emitting devices, includes: dividing the plurality of light emitting devices into a plurality of blocks by grouping adjacent light emitting devices of the plurality of light emitting devices; adjusting levels of driving signals supplied to the adjacent light emitting devices for each of the plurality of blocks so that emission luminances of the adjacent light emitting devices belonging to the each of the plurality of blocks become substantially equal to each other; and adjusting emission periods so that the equalized emission luminances of the plurality of blocks become substantially equal to each other.

Abstract: A light source unit is provided which includes a light source with a plurality of light emission portions two-dimensionally arranged; a substrate on which the light source is mounted; a first support portion supporting the substrate; a bias member biasing the substrate towards the first support portion; a coupling element coupling a light beam emitted from the light source; a second support portion supporting the coupling element; and a holding member holding a position of the substrate relative to the first support portion.

Abstract: An image forming apparatus includes an image carrier that has an image carrier surface moving in a direction; a supporting member that faces the image carrier; a plurality of light emitting elements which are provided on a surface of the supporting member facing the image carrier and emit light to form a latent image on the image carrier; a roller which is arranged on the surface of the supporting member facing the image carrier such that a rotational shaft thereof extends in a direction traversing an image carrier surface; and an urging unit which urge the supporting member against the image carrier so that the roller comes into contact with the image carrier.

Abstract: A light emitting array including at least a plurality of light emitting elements, each of which is provided thereon with a microlens in one-to-one correspondence. Light emitting portions of the light emitting element are provided having the shape of a rectangle and formed so as to satisfy the relational expression, Lmin?D?P, where Lmin is the length of the shorter side of the rectangle, P an alignment pitch of the light emitting elements, and D the diameter of microlens. In addition, light emitting elements are formed in line on a transparent thin film layer to satisfy the relationship, T1?2·D2, where T1 is the thickness of the transparent thin film layer and D2 the diameter of each microlens. The light emitting array may suitably be included in the light source unit which is then incorporated into image forming apparatuses for forming mono-color or multiple-color images.

Abstract: A line head, includes: a head substrate that includes a plurality of light emitting element groups as groups of light emitting elements; a lens array that includes a plurality of lenses each of which faces the corresponding light emitting element group in a first direction; and a light shielding member that is disposed between the head substrate and the lens array and includes a plurality of light shielding plates which are arranged side by side in the first direction while defining a space layer therebetween, wherein each of the plurality of light shielding plates is provided with a plurality of light guide holes penetrating in the first direction and facing the plurality of light emitting element groups in the first direction respectively, the plurality of light guide holes facing each of the light emitting element groups are arranged in the first direction respectively to form a plurality of light guide portions, and lights from the plurality of light emitting element groups are incident on the plurality o

Abstract: An electro-optical device includes a light source array having a plurality of light-emitting devices arranged on a substrate in a direction, a lens array having a plurality of lens elements arranged in the direction, each lens element forming an image on an image carrier using light from the light-emitting element, and a first light transmissible member and a second light transmissible member disposed between the light source array and the lens array so as to be in contact with the light source array and the lens array, in which the first light transmissible member and the second light transmissible member are arranged in continued manner in the direction, and wherein the first light transmissible member and the second light transmissible member are different in any one or more characteristics of refractive index, elastic modulus and light transmittance.

Abstract: A surface-emission laser array comprises a plurality of surface-emission laser diode elements arranged in the form of a two-dimensional array, wherein a plurality of straight lines drawn perpendicularly to a straight line extending in a first direction from respective centers of the plurality of surface emission laser diode elements aligned in a second direction perpendicular to the first direction, are formed with generally equal interval in the first direction, the plurality of surface-emission laser diode elements are aligned in the first direction with an interval set to a reference value, and wherein the number of the surface-emission laser diode elements aligned in the first direction is smaller than the number of the surface-emission laser diode elements aligned in the second direction.

Abstract: A laser beam emitted from each semiconductor laser 27 is guided by a step index type multi-mode optical fiber, a graded index type multi-mode optical fiber deformable and movable with movement of a recording head, and a step index type multi-mode optical fiber, to be emitted from a light emitter toward an imaging optical system.

Abstract: An ultraviolet rays emitter for irradiating ultraviolet rays on an ink of an ultraviolet curing type adhered onto a recording medium includes semiconductor light emitting elements for emitting ultraviolet rays and a support member for mutually supporting these semiconductor light emitting elements in a matrix with optical axes thereof in almost parallel, and the row or column of the semiconductor light emitting elements has a structure in which two kinds of semiconductor light emitting elements having different wavelength ranges or more are arranged in order. Alternatively, an ultraviolet rays emitter has a structure in which a plurality of semiconductor light emitting elements is mutually supported with a support member in a positional relationship in which the optical axes of the respective elements are mutually inclined in such a manner that the irradiation regions of ultraviolet rays emitted from the semiconductor light emitting elements overlap on a recording medium.

Abstract: An electro-optical device includes an electro-optical panel which has a plurality of electro-optical elements whose light-emitting characteristics or transmissive characteristics are changed by electrical energy applied; and a converging lens array which has a plurality of distributed index lenses, each transmitting light traveling from the electro-optical panel to form an erect image with respect to an image on the electro-optical panel, the images formed by the plurality of distributed index lenses constituting a continuous image. The electro-optical panel is directly bonded to the converging lens array.

Abstract: An image recording apparatus (1) causes a recording head (20) to move through a distance corresponding to one half of the recording width of the recording head (20) in a sub-scanning direction each time a recording drum (10) makes one rotation. This, light emitting devices (23, 24) record two line data in advance, and thereafter following light emitting devices (21, 22) record the same line data repeatedly at the same position. This increases the energy of laser light beams given to a recording position on a printing plate (P) to accomplish the recording of an image with reliability. The recording speed is not extremely decreased because not all light emitting devices (21 to 24) are used to make the repeated recordings at the same position on the printing plate (P). Further, the construction of optical systems and driving systems in the image recording apparatus is not complicated.

Abstract: A novel semiconductor article manufacturing method and the like are provided. A method of manufacturing a semiconductor article having a compound semiconductor multilayer film formed on a semiconductor substrate includes: preparing a member including an etching sacrificial layer (1010), a compound semiconductor multilayer film (1020), an insulating film (2010), and a semiconductor substrate (2000) on a compound semiconductor substrate (1000), and having a first groove (2005) which passes through the semiconductor substrate and the insulating film, and a semiconductor substrate groove (1025) which is a second groove provided in the compound semiconductor multilayer film so as to be connected to the first groove, and bringing an etchant into contact with the etching sacrificial layer through the first groove and then the second groove and etching the etching sacrificial layer to separate the compound semiconductor substrate from the member.

Abstract: An image forming apparatus includes a photoreceptor which is rotatable with respect to a body frame, an exposing member which is movable relative to the body frame, a spacing member which is provided between the exposing member and the photoreceptor to maintain a distance between the photoreceptor and the exposing member, a positioning member which makes a contact with the exposing member to position the exposing member in a direction of rotation of the photoreceptor, and a pressing member which is provided to the body frame to press the exposing member toward the photoreceptor and the positioning member. Accordingly, it is possible to position the exposing member accurately with respect to the photoreceptor, in any of the light-axis direction and the rotational direction of the photoreceptor.

Abstract: A line head includes: a first substrate having a plurality of organic electroluminescent devices; a bonding layer disposed on the first substrate and having optical transparency; a second substrate bonded to the first substrate with the bonding layer therebetween and having a reflective film that covers at least a part of the bonding layer; and a plurality of exit portions respectively from which light that has passed through the bonding layer is exited, the light emitted from the organic electroluminescent devices.

Abstract: Disclosed are a print head and an image forming apparatus employing the same. The print head, which irradiates light to multiple locations of a photosensitive medium to form pixels of electrostatic latent image, includes an array of light sources corresponding to the pixels, a distributed Bragg reflector disposed adjacent the surface of the light source array from which the light source array output light, and a light focusing unit which focuses the light that have passed through the distributed Bragg reflector onto the locations of photosensitive medium.

Abstract: An optical unit array comprises a plurality of optical units (2) in each of which a plurality of light source modules (1) are arranged and a first comb-teeth member (41) and a second comb-teeth member (42) which are provided for holding the optical units (2), and respective first pins (213) and second pins (214) of a plurality of optical units (2) are held by the first comb-teeth member (41) and the second comb-teeth member (42). In the optical unit array (4), positions of a plurality of optical units (2) relative to one another can be determined with high accuracy by bringing the first pins (213) and the second pins (214) into contact with grooves (411) and grooves (421), respectively. The outgoing positions and directions of light beams emitted from the light source modules (1) are also determined with high accuracy in each optical unit (2).

Abstract: In order to realize a pattern forming method for more precisely controlling a reacting area of photosensitive resin during formation of a fine pattern on a substrate and also for simplifying thickness management of the photosensitive resin a fine pattern can be formed through reaction of the photosensitive resin layer by particularly condensing an ultra-short pulse laser to a location where the focal point of the laser is at the interface between the substrate and the photosensitive resin. In this case, the ultra-short pulse laser is radiated through the substrate.

Abstract: An exposure device includes a first light source column, a second light source column, and a light converger. A distance along a first direction between the center of a first light source of the first light source column and the center of a second light source of the second light source column, which is located to a second direction relative to the first light source, is larger than a distance along the first direction between the center of a third light source of the first light source column, which is located farther from an optical axis of the light converger than the first light source and the center of a fourth light source of the second light source column, which is located to the second direction relative to the third light source.

Abstract: A writing device to write an image onto a photoconductor, including a print head having plural LEDs, a first supporting member, having a position determining section to determine the position of the print head, and an adjustment screw, and a second supporting member, having a reference shaft which comes into contact with the first supporting member and movably supports the first supporting member while moving to or separating from the photoconductor, and a pressuring member which presses the first supporting member against the reference shaft, wherein the second supporting member is engaged with the first supporting member by the adjustment screw, whereby when the adjustment screw is rotated, the print head is shifted along with the first supporting member, and a first direction joining the position determining section and the adjustment screw makes a right angle with a second direction joining the adjustment screw and the reference shaft.

Abstract: An imaging device includes an image carrier; and an array of ultra-small light-emitting resonant structures constructed and adapted to emit light onto the image carrier, at least one of said ultra-small light-emitting structures emitting light in response to exposure to a beam of charged particles. The image carrier may be a drum. One or more imaging devices may be incorporated in a copying machine; a printer; or facsimile machine.

Abstract: A plurality of first light emitters are arrayed on the substrate in a first direction so as to form a light emitter array. Each of the first light emitters has a first dimension in the first direction. A plurality of second light emitters are arrayed on the substrate in the first direction. Each of the second light emitters has a second dimension in the first direction which is larger than the first dimension.