Abstract: A line head, includes a light-emitting element row, having a plurality of light-emitting elements arranged in a first direction; a plurality of feeding portions; a first power supply line for power supply, connected to a first feeding portion for a power supply of the feeding portions; and a second power supply line for ground, connected to a second feeding portion for a ground of the feeding portions. The light-emitting elements are respectively connected between the first power supply line and the second power supply line.

Abstract: As a scanning light beam which is scanning and traveling away from an effective image region moves passed the location of a sensor, a horizontal synchronizing signal Hsync is obtained as a first detection signal. A deflection mirror surface turns around, thereby reversing the direction in which the scanning light beam scans. This scanning light beam therefore scans an effective image region IR, and a latent image forming operation using this scanning light beam is controlled based on the horizontal synchronizing signal Hsync. Hence, there is a relatively long period of time (T4+T5) since the horizontal synchronizing signal Hsync is obtained until formation of a latent image starts in accordance with the signal Hsync. This secures sufficient time for control of the latent image forming operation based on the horizontal synchronizing signal Hsync, and hence, realizes the latent image forming operation as desired during the time T6.

Abstract: A line head includes: a positive lens system having two lenses with positive refractive power; a lens array in which a plurality of the positive lens systems are arrayed in a first direction; a light emitter array in which a plurality of light-emitting elements are arrayed on an object side of the lens array so as to correspond to the one positive lens system; and an aperture plate that forms an aperture diaphragm at the position of an object-side focal point of the positive lens system. An object-side surface of an object-side lens of the positive lens system is positioned close to the object-side focal point.

Abstract: A light exposure head includes a base; a substrate disposed on the base, the substrate having a plurality of light emitting elements disposed thereon; and n (n is an integer greater than or equal to one) imaging optical systems, each of which having a negative optical magnification, the imaging optical systems focusing light beams emitted from the plurality of light emitting elements disposed on the substrate.

Abstract: An image forming device includes a photoconductor drum having a rotational shaft in a first direction, and an exposure head having a plurality of imaging optical systems disposed in the first direction and a second direction and each having a negative optical magnification, and a light emitting element substrate on which a plurality of light emitting elements are disposed, the plurality of light emitting elements emitting light beams imaged on the photoconductor drum by one of the imaging optical systems, and the light beams are imaged by the imaging optical systems disposed in the second direction on the photoconductive drum at positions different from each other in the second direction.

Abstract: The apparatus is adapted to deflect a light beam from a laser light source for each of the color components by means of a deflection mirror surface which oscillates, thereby making the light beam reciprocally scan in a main scanning direction. In this apparatus, however, only a light beam SL which scans in a first direction (+X) of the main scanning direction is irradiated in an effective image region on a photosensitive member, so as to form a latent image thereon. The resultant latent image is developed to form a toner image. Since image formation is performed using only the light beam SL which scans in the first direction (+X), the images may be formed at the consistent density irrespective of the image types. Furthermore, the scanning directions of the light beams SL for all the color components are uniformly defined to be the first direction (+X), so that the toner images of the respective colors may maintain the consistent density.

Abstract: The invention provides an optical write linehead comprising a plurality of light emitter devices in rows located in association with each of a plurality positive lenses lined up in array form and designed such that even when the surface of the linehead with light emitter devices lined up on it and the write surface thereof fluctuate in the optical axis direction, there is no variation from misalignments of light-emission dots. The linehead comprises a light emitter array 1 including a plurality of light emitter blocks 4 located at least in the main scan direction at intervals. Each light emitter block 4 includes at least one row of a plurality of light emitter devices lined up in array form in the main scan direction. One each positive lens system 5 is located on the exit side of the light emitter array 1 and in line with each light emitting block 4. A write surface 41 is located on the imaging side of the lens array.

Abstract: A plurality of photo emitters are arrayed on a transparent substrate in a first direction to form at least one photo emitter array. An electrode is provided on the substrate and electrically connected to the photo emitters in common. A dimension of the electrode in a second direction perpendicular to the first direction is smaller than a dimension of the substrate in the second direction.

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: A light scanning apparatus makes a light beam scan along a main scanning direction on an effective scanning region which has a predetermined width. The apparatus comprises: a light source which emits the light beam; a deflector which includes an oscillation mirror which oscillates about an oscillatory axis which is orthogonal or approximately orthogonal to the main scanning direction, deflects the light beam emitted from the light source using the oscillation mirror, and makes the light beam scan a second scanning range which contains but extends beyond a first scanning range which corresponds to the effective scanning region; a detector which detects the scanning light beam which moves through a position which is outside the first scanning range but is within the second scanning range, and outputs a signal; and a controller which controls a mirror drive signal fed to the oscillation mirror based on the output signal from the detector and accordingly adjusts the amplitude of the oscillation mirror.

Abstract: An image forming method which generates a video signal corresponding to an image forming command based on a video clock signal, modulates a light beam according to the video signal, and scans the modulated light beam along a main scanning direction by means of an oscillation mirror which resonates based on a drive signal, so as to form a latent image in an effective image region of a latent image carrier, the method includes: synchronizing the drive signal with the video clock signal to synchronize a detection signal with the vide clock signal, the detection signal being output from a detector which detect the light beam scanned in the main scanning direction in a region away from an effective scan region which corresponds to the effective image region; controlling a resonant frequency of the oscillation mirror based on the detection signal so that the resonant frequency of the oscillation mirror almost coincides with the frequency of the drive signal; and adjusting a position, at which the latent image is wr

Abstract: A mirror driver drives deflection mirror surfaces into a pivoting action at a frequency belonging to a first drive frequency band in which the high-frequency side of a first resonance frequency band partially overlaps the low-frequency side of a second resonance frequency band, so that the deflection mirror surfaces deflect a light beam. Hence, the deflection angles of light beams change, while canceling out each other the changes of the deflection angles of the light beams deflected by the deflection mirror surfaces owing to changes of resonance characteristics. Because of this, even when the resonance characteristics change, it is possible to stabilize the deflection angle of the light beam deflected by the first deflection mirror surface and further deflected by the second deflection mirror surface.

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 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 line head, includes: a plurality of first substrates each of which includes a plurality of light emitting elements which emit light beams, a second substrate to which the plurality of first substrates are bonded, and an optical system which includes a plurality of lenses which focus light beams emitted from the plurality of light emitting elements toward an image plane, and in which a plurality of lenses face each of the plurality of first substrates.

Abstract: A photosensitive member is movable in a first direction. A line head is provided with a plurality of organic-EL photo emitters, arrayed in a second direction perpendicular to the first direction to form a plurality of photo emitter arrays arranged in the first direction. A plurality of imaging lenses are arrayed in the second direction to form at least one lens array, so that an array of pixels defined on the photosensitive member are subjected to multiple exposure to light emitted from the photo emitter arrays in accordance with the movement of the photosensitive member, thereby forming an electrostatic latent image on the photosensitive member. At least one chromatic-aberration correcting lens is adapted to correct chromatic aberration of the imaging lenses relative to the first direction, and disposed between the photo emitter arrays and the lens array.

Abstract: In a line head, a plurality of element arrays arranged in a first direction. Each array includes a plurality of light emission elements arrayed in a second direction which is perpendicularly to the first direction. The light emission elements emit light for forming an electrostatic talent image on a photosensitive surface of an image carrier. A switcher activates the light emission elements in at least one of the element arrays while deactivating the others. A developer develops the latent image as a visible image with toner.

Abstract: A light scanning apparatus makes a light beam scan along a main scanning direction on an effective scanning region which has a predetermined width. The apparatus comprises: a light source which emits the light beam; a deflector which includes an oscillation mirror which oscillates about an oscillatory axis which is orthogonal or approximately orthogonal to the main scanning direction, deflects the light beam emitted from the light source using the oscillation mirror, and makes the light beam scan a second scanning range which contains but extends beyond a first scanning range which corresponds to the effective scanning region; a detector which detects the scanning light beam which moves through a position which is outside the first scanning range but is within the second scanning range, and outputs a signal; and a controller which controls a mirror drive signal fed to the oscillation mirror based on the output signal from the detector and accordingly adjusts the amplitude of the oscillation mirror.

Abstract: In a line head, a plurality of element arrays arranged in a first direction. Each array includes a plurality of light emission elements arrayed in a second direction which is perpendicularly to the first direction, The light emission elements emit light for forming an electrostatic latent image on a photosensitive surface of an image carrier. A switcher activates the light emission elements in at least one of the element arrays while deactivating the others. A developer develops the latent image as a visible image with toner.

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