| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 399218000 | Lens | 15 |
| 20080240785 | Exposure apparatus and image forming apparatus - 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. | 10-02-2008 |
| 20090003881 | OPTICAL MEMBER COUPLING DEVICE AND OPTICAL SCANNING APPARATUS - An optical scanning apparatus includes a light source to generate a beam, a lens to transmit the beam generated from the light source, and a base member to which the lens is fixed, wherein the lens is fixed to the base member via a mount member having a same coefficient of thermal expansion as the lens. According to the present general inventive concept, an optical member, such as the lens, is not directly joined to the base member but is joined to the mount member having the same coefficient of thermal expansion as the optical member and is then coupled to the base member. Consequently, the optical member is stably coupled to the base member even when the temperature changes. | 01-01-2009 |
| 20090035020 | Linehead and Imaging Apparatus Incorporating the Same - 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 | 02-05-2009 |
| 20090060579 | Exposure Head And An Image Forming Apparatus Using The Exposure Head - An exposure head, includes: a first imaging optical system and a second imaging optical system which are arranged in a first direction; a light emitting element which emits light to be imaged by the first imaging optical system; and a light emitting element which emits light to be imaged by the second imaging optical system, wherein an inter-optical-system distance in the first direction between the first imaging optical system and the second imaging optical system satisfies the following expression: | 03-05-2009 |
| 20090185828 | Lens Array, Exposure Head, and Image Forming Apparatus - A lens array includes a light-transmissive substrate that satisfies the condition W | 07-23-2009 |
| 20090185829 | Line Head and Image Forming Apparatus Using the Same - 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. | 07-23-2009 |
| 20100034562 | Lens Array and Line Head - A lens array includes: a light transmissive lens array substrate; a plurality of lenses disposed on the lens array substrate in a first direction; and a line-like mark formed on the lens array substrate in a second direction one of perpendicular and substantially perpendicular to the first direction. | 02-11-2010 |
| 20100183336 | Line Head and Image Forming Apparatus - An optical system of a line head images light emitted from first and second light emitting elements and includes a rotationally symmetric lens having a lens face. A first region of the lens face includes an intersection point of the lens face with the symmetry axis of the lens, and a second region surrounding a periphery of the first region. The shape of a boundary portion between the first and second regions has the relationship 0.5ω<Δθ, wherein ω is a first direction angle that a first chief ray emitted by the first light emitting element makes with a second chief ray emitted by the second light emitting element, and Δθ is an angle that a tangent line to the first region at the boundary portion makes with a tangent line to the second region at the boundary portion in a first direction cross-section including the symmetry axis. | 07-22-2010 |
| 20100202800 | Line Head and Image Forming Apparatus - 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: |C | 08-12-2010 |
| 20110013940 | OPTICAL SCANNER - An optical scanner includes a frame, a light source, an optical member, and a spacer. The light source emits a light beam. The optical member is mounted on the frame to guide the light beam to a scanning target. The spacer maintains the optical member at a predetermined position with respect to the frame. The spacer is formed of a photocurable resin that is cured in response to a predetermined light having a wavelength within a prescribed range. | 01-20-2011 |
| 20110058853 | PLASTIC OPTICAL ELEMENT, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS - A plastic optical element for use in an optical scanning device including light effective portions that focus light, and at least one link portion that connects the light effective portions in the sub-scanning direction, the link portion forming a border arc having a curvature radius R of 2 mm or greater and contacting the light effective portions such that the tangent of the light effective portion at the connection point of the light effective portion and the border arc matches the tangent of the border arc at the connection point. | 03-10-2011 |
| 20110268476 | LENS-MOUNTING STRUCTURE, AND OPTICAL-SCANNING APPARATUS AND IMAGE-FORMING APPARATUS EQUIPPED WITH THE SAME - A lens-mounting structure according to the present invention is; a lens mounting structure that glues a lens and a mounting surface of a support portion that supports the lens using an adhesive agent applied therebetween, to mount the lens to the support portion, characterized by setting a gluing surface area of the mounting surface of the support portion and the adhesive agent to be smaller than a gluing surface area of the lens and the adhesive agent. | 11-03-2011 |
| 20110280628 | Lens array, linear light exposure device, and optical apparatus employing the linear light exposure unit - A lens array, a linear light exposure device, and an optical apparatus including the linear light exposure device. The lens array includes: an image side lens array unit in which a plurality of lens cells are arranged in at least one line along an arrangement direction to have optical axes parallel with each other; and a light blocking unit provided on an incidence surface of the image side lens array unit, the light blocking unit having light transmission regions, through which light is transmitted toward each lens cell, and blocking regions in regions other than the light transmission regions, wherein each lens cell of the image side lens array unit has a square formed effective optical region. | 11-17-2011 |
| 20140064791 | OPTICAL ELEMENT UNIT - An optical element unit is provided comprising an optical element group for projecting light along an optical axis of the optical element group and a housing having an inner housing part partly defining a first space and a light passageway between the inner housing part and a second space. The inner housing part receives the optical element group. The optical element group comprises an ultimate optical element located in the region of the light passageway. A load-relieving device is provided adjacent to the ultimate optical element, the load relieving device partly defining the first space and the second space and at least partly relieving the ultimate optical element from loads resulting from pressure differences between the first space. | 03-06-2014 |
| 20150293468 | IMAGE FORMING DEVICE - An exposure unit includes a lens group having a plurality of lenses arrayed in a first direction and an element array which is arranged to face the lens group and includes a plurality of organic EL elements arrayed in parallel with the first direction on a substrate, a drive circuit including a plurality of TFT circuits for controlling luminance per unit time of the organic EL element is arranged on the substrate, and the TFT circuit controls the luminance of the organic EL element based on a signal created by an area gray scale method. | 10-15-2015 |
