Abstract: An exposure head includes: a group of light emitting elements in which light emitting elements are arranged in a first direction; a light emitting element substrate in which the group of light emitting elements is arranged in the first direction and in a second direction orthogonal or substantially orthogonal to the first direction; and a driving substrate which drives the light emitting elements arranged on the light emitting element substrate, wherein the driving substrate controls a light emission intensity of a light emitting element that is near to an end side in the first direction of the group of the light emitting elements, among the light emitting elements constituting the group of the light emitting elements, so that the intensity is smaller than the light emission intensity of a light emitting element constituting the group of the light emitting elements different from the above light emitting element, and the light emission intensity becomes smaller towards the end side.

Abstract: An image forming apparatus, includes: a latent image carrier that moves in a first direction; an exposure head that includes a first imaging optical system, a second imaging optical system that is distanced from the first imaging optical system in the first direction, a light emitting element that emits a light to be imaged on the latent image carrier by the first imaging optical system and a light emitting element that emits a light to be imaged on the latent image carrier by the second imaging optical system; and a controller that is adapted to control a light quantity of the light emitting element that emits a light to be imaged on the latent image carrier by the first imaging optical system in accordance with an imaging characteristic of the first imaging optical system.

Abstract: A line head, includes: a lens array that includes a first lens, a second lens and a light transmissive substrate on which the first lens and the second lens are arranged in a first direction; and a light emitting element substrate on which light emitting elements are arranged in the first direction, wherein the first lens is formed such that, in a cross section in the first direction including an optical axis of an imaging optical system comprised of the first lens, a curvature of the first lens at an outer peripheral portion has a sign opposite to that of a curvature of the first lens on the optical axis or has a smaller absolute value than the curvature of the first lens on the optical axis.

Abstract: An exposure head, includes: imaging optical systems which are arranged in a first direction; light emitting elements which are arranged in a second direction orthogonal to or substantially orthogonal to the first direction and emit lights to be imaged by the imaging optical systems; a first wiring which is connected with the light emitting element located at a first side in the second direction; and a second wiring which is connected with the light emitting element located at a second side in the second direction.

Abstract: A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the pl

Abstract: In a line head, a plurality of light emitters are arrayed on a substrate in a first direction. Each of the light emitters is operable to emit a light beam. In a rod lens array, a plurality of rod lenses are arrayed in the first direction, and each of the rod lenses is adapted to focus the light beam emitted from an associated one of the light emitters onto a target surface. The substrate and the rod lens array are attached to a holder elongated in the first direction. Positioning members are provided at both end portions of the holder in the first direction. A relative position between the substrate and at least one of the positioning members is variable in a second direction perpendicular to the first direction.

Abstract: Disclosed is an exposure head including a light emitting element array including light emitting elements disposed in a first direction, a light blocking member including an aperture stop through which lights emitted from the light emitting elements pass, and an image forming optical system that makes an image by using the lights having passed through the light blocking member. An absolute value of a magnification in the first direction of the image forming optical system is equal to or more than 0.7 times and is equal to or less than 0.8 times.

Abstract: A exposure head includes: a light-emitting element substrate including a first light-emitting element configured to emit light, a second light-emitting element disposed in a first direction of the first light-emitting element, a third light-emitting element, and a fourth light-emitting element disposed so as to satisfy the following relationship; Dr12:Dr23=1:m (l?m) where, l: positive integer number, m: positive integer number, Dr12: distance between the first light-emitting element and the third light-emitting element in the direction orthogonal to the first direction, Dr23: distance between the third light-emitting element and the fourth light-emitting element in the direction orthogonal to the first direction, and an imaging optical system configured to image lights emitted from the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element.

Abstract: An image forming device includes: an exposure head having a plurality of light emitting elements arranged in a first direction, a first imaging optical system adapted to image light emitted from the light emitting elements, and a second imaging optical system disposed in a second direction with respect to the first imaging optical system; a latent image carrier movable in the second direction; a detection section adapted to detect a moving time the latent image carrier takes to move from a first position to a second position in the second direction; and a control section adapted to control the time from emission of a first part of the light emitting elements adapted to emit light to be imaged by the first imaging optical system to emission of a second part of the light emitting elements adapted to emit light to be imaged by the second imaging optical system based on the detection result of the detection section, thereby aligning a latent image formed on the latent image carrier by the first imaging optical sy

Abstract: An exposure head including: light-emitting elements disposed at a first pitch in a first direction; and drive circuits disposed at a second pitch wider than the first pitch in the first direction on one side of the light-emitting elements in a second direction orthogonal to or substantially orthogonal to the first direction and configured to cause the light-emitting elements to emit light.

Abstract: An image forming device includes: an exposure head that includes a light emitting element and a light emission controller that causes the light emitting element to emit light on the basis of a control signal; a photoreceptor that is exposed to the light emitted by the light emitting element included in the exposure head so that a latent image is formed on the photoreceptor; a correcting section that corrects the control signal on the basis of the spectral sensitivity of the photoreceptor to a spectral distribution of the light emitting element; and a developing section that develops the latent image formed on the photoreceptor.

Abstract: An image forming device includes an image generating section that generates an image including a plurality of screen types, an image processing section that performs a grayscale screen process on the image and generates grayscale data and screen type data for each pixel, a line head to which the grayscale data for each pixel section is sequentially transmitted, and a light intensity correction circuit that corrects light intensity of each pixel. The image processing section transmits the screen type data for each pixel to the light intensity correction circuit. The light intensity correction circuit transmits a light intensity correction value for each pixel to the line head. The light intensity correction value for each pixel is obtained based on the corresponding screen type data so that pixels of different screen types of the image are corrected in accordance with the corresponding screen types.

Abstract: A line head includes: a first lens formed from a resin and on a glass substrate; and a light emitting element substrate that has light emitting elements arranged in a first direction, wherein a cross section of the first lens taken in the first direction and including an optical axis of the first lens has a configuration wherein a curvature of the first lens at the optical axis has a larger absolute value than a curvature of an outer peripheral portion of the first lens.

Abstract: An exposure head, includes: an imaging optical system; a first light emitting element that emits a light which is to be focused by the imaging optical system; a second light emitting element that emits a light which is to be focused by the imaging optical system; a first TFT circuit that is connected with the first light emitting element via an interconnection wire; and a second TFT circuit that is connected with the second light emitting element via an interconnection wire, wherein the first light emitting element and the second light emitting element are provided between the first TFT circuit and the second TFT circuit.

Abstract: An exposure head includes a substrate having a plurality of light emitting element rows each having a plurality of light emitting elements arranged in a first direction, the light emitting element rows being arranged in a second direction perpendicular or substantially perpendicular to the first direction, and an imaging optical system adapted to image light beams from the light emitting elements on an exposed surface to form respective light-collected sections, and two of the light emitting elements forming the light-collected sections adjacent to each other in the first direction are respectively disposed in the light emitting element rows different from each other, and one of the light emitting element rows is disposed so as to match or substantially match with the meridian plane of the imaging optical system.

Abstract: A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the pl

Abstract: A line head, includes: a head substrate; a first light emitting element group which is arranged on the head substrate and includes a first light emitting element and a second light emitting element; a second light emitting element group and a third light emitting element group which are arranged in a first direction on the head substrate; a first wiring which is arranged between the second and the third light emitting element groups on the head substrate and is electrically connected with the first light emitting element; a second wiring which is arranged between the second and the third light emitting element groups on the head substrate and is electrically connected with the second light emitting element; and a connecting portion which is arranged on the head substrate and is electrically connected with the first and the second wirings.

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: A line head includes: a first lens array having a plurality of first lenses each having a convex surface as a light incidence surface; a second lens array that is arranged at a light-emitting surface side of the first lens array so as to be opposite to the first lens array and that has a plurality of second lenses, which are arranged at positions corresponding to the plurality of first lenses and each of which has a convex surface as a light incidence surface; and at least a light-emitting element provided for each of the first lenses at a light incidence side of the first lens array.

Abstract: A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the pl