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| Number | Title | Issue Date |
| 8179416 | Line head and image forming apparatus 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 fr... | 05/15/2012 |
| 8130254 | Optical scanning apparatus and color image forming apparatus using the same The optical scanning apparatus has at least two scanning units S1 and S2 which are arranged so as to oppose each other with a deflecting unit interposed therebetween. The scanning units include incident optical systems La and Lb that guide light beams ... | 03/06/2012 |
| 8120635 | Exposure head and an image forming apparatus An exposure head, includes: a lens array that includes a light transmissive substrate whose length in a first direction is greater than a length thereof in a second direction orthogonal to the first direction, a first lens that is arranged on the light transmissive ... | 02/21/2012 |
| 8059149 | Optical scanning device and image forming apparatus An optical scanning device includes a light source, a pre-deflection optical system, a polygon mirror, and a scanning optical system. The pre-deflection optical system includes a coupling lens and a diffraction lens. A light output surface of the coupling lens is a ... | 11/15/2011 |
| 8009187 | Lens sheet and printer A lens sheet has an external shape of a rectangle or a square defined by four sheet ends in a vertical direction thereto. The lens sheet includes: a first surface, on which a plurality of lenses extending in a direction inclined to one of the sheet ends are arranged... | 08/30/2011 |
| 8004554 | Plastic optical element, optical scanning device, and image forming apparatus using the optical scanning device A plastic optical element for guiding a scanned light beam in a main scanning direction and a sub-scanning direction, which is prepared by a molding method using a die. The element includes: a main body including at least two optically functional surfaces, which are... | 08/23/2011 |
| 8004553 | Optical scanning device, optical scanning method, and image forming apparatus, using the optical scanning device An optical scanning device for guiding a light beam to a member to scan the member with the light beam, including a light source emitting the light beam; a light deflector deflecting the light beam; a focusing optical system including a plastic optical element molde... | 08/23/2011 |
| 7969460 | Optical scanning device and image forming apparatus Disclosed is an optical scanning device including a light source including multiple light-emitting elements, the multiple light-emitting elements being arranged in a linear manner, a collimator lens to collimate a light beam from the light source, a light-deflecting... | 06/28/2011 |
| 7956885 | 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 pe... | 06/07/2011 |
| 7929008 | Line head and an image forming apparatus 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 includi... | 04/19/2011 |
| 7907163 | Lens sheet and printer A lens sheet has an external shape of a rectangle or a square defined by four sheet ends in a vertical direction thereto. The lens sheet includes: a first surface, on which a plurality of lenses extending in a direction inclined to one of the sheet ends are arranged... | 03/15/2011 |
| 7889222 | Lens array for a line head, a line head and an image forming apparatus A line head, includes: a head substrate that includes a first light emitting element and a second light emitting element; and a lens array that includes a first positive lens that images a light emitted from the first light emitting element on a specified plane and ... | 02/15/2011 |
| 7859558 | Optical scanning device, control method thereof, and image forming apparatus therewith An optical scanning device is disclosed, including: a light deflection part, an imaging optical element, a variable focus optical element, and a focal point control device. The light deflection part repeatedly deflects and scans a light flux emitted from a light sou... | 12/28/2010 |
| 7847994 | Light scanning system and image forming apparatus A light scanning system and an image forming apparatus including the same, the light scanning system including: one or more light sources to emit light; a deflector to deflect the emitted light; and one or more f-θ lenses to focus the deflected light onto a photose... | 12/07/2010 |
| 7843482 | Multi-beam optical scanning device and image forming apparatus A multi-beam scanning device is disclosed that is able to realize a stable and small beam spot and realize stable scanning line intervals between plural light beams. The multi-beam optical scanning device includes a first optical system which has a first lens for co... | 11/30/2010 |
| 7768542 | Multi-beam optical scanning device and image forming apparatus using the same A multi-beam optical scanning device which enables uniform scan line pitch and high precision image, includes a light source having plural light emitting members, a rotary polygonal mirror having a deflecting surface, a first optical system for imaging a light beam ... | 08/03/2010 |
| 7755658 | Light beam scanning apparatus with electro-optic crystal There is provided a light beam scanning apparatus which deflects a light beam from a light source by using a deflector and scans the surface of a photosensitive member with a focused light beam. The light beam scanning apparatus includes a first electro-optical elem... | 07/13/2010 |
| 7750933 | Optical scanning unit and electro-photographic image forming apparatus including the same An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected ... | 07/06/2010 |
| 7738007 | Optical scanning device and method for adjusting errors In an optical scanning device, a lateral magnification in a direction corresponding to a sub scanning direction of an optical system is adjusted to be small by a coupling optical system that includes a first lens and a second lens. As a result, scanning by a plurali... | 06/15/2010 |
| 7728863 | Optical scanning device and image forming apparatus An optical scanning device has a light source, a unit configured to deflect a light beam from the light source; and a system including at least two scanning lenses and configured to guide the light beam deflected to a surface to be scanned. One of the scanning lense... | 06/01/2010 |
| 7710446 | Light scanning unit and image forming apparatus using the same A light scanning unit includes: a light source generating and irradiating at least one beam corresponding to an image signal; a beam deflector deflecting and scanning the beam irradiated by the light source; and an f-θ lens forming an image from the beam deflected ... | 05/04/2010 |
| 7663657 | Optical scanning device and image forming apparatus An optical scanning device includes a light source having light emitting points for emitting light beams, a coupling optical element that couples the light beams, a deflecting unit that deflects and scans the light beams, and a scanning optical system that focus the... | 02/16/2010 |
| 7636102 | Optical scanning apparatus and image-forming apparatus using the same At least one exemplary embodiment is directed to an optical scanning apparatus which includes a Vertical Cavity Surface Emitting Laser including a plurality of light-emitting portions that are spaced from each other in at least a sub-scanning direction, a first opti... | 12/22/2009 |
| 7598974 | Multi-beam optical scanning device It is an object of the present invention to realize a multi-beam optical scanning device which is suitable for high speed and high recording density by almost completely offsetting and correcting a deviation of focusing positions in a main scanning direction of plur... | 10/06/2009 |
| 7573496 | Scanning optical apparatus An optical scanning apparatus which does not require a complex shaped lens and which is capable of eliminating the bow of a beam light even when the shapes of a plurality of correcting lenses are unified by setting a shape of a sub-scanning cross-section of a scanni... | 08/11/2009 |
| 7570278 | Optical scanning device and image forming apparatus Light beams emitted from a light source, which is a semiconductor laser, are changed to weak diverging rays by a coupling lens, pass through an aperture, and are changed to parallel beams in a main scanning direction and light beams, which focus near a polygon mirro... | 08/04/2009 |
| 7522180 | Image writing apparatus and color image forming apparatus The present invention provides a color image forming apparatus forming an image by using a plurality of image carriers, wherein at least one lens having identical optical characteristics and forming individual scanning optical systems which scan the individual image... | 04/21/2009 |
| 7515168 | Laser scanning optical apparatus having exclusive optical elements at varying distances from receiving surfaces A laser scanning optical apparatus wherein a plural number of beams are deflected by one polygon mirror and are scanned on respective corresponding photosensitive drums via a scanning optical system. The scanning optical system has a first scanning lens which transm... | 04/07/2009 |
| 7468736 | Image forming apparatus 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 direc... | 12/23/2008 |
| 7463277 | Color image forming apparatus having scanning lens disposed in reverse orientation A color image forming apparatus forms color images on a recording medium by superposing images one after another. The color image forming apparatus includes at least one image bearing member and a plurality of scanning units. At least the one image bearing member be... | 12/09/2008 |
| 7443412 | Exposure apparatus adopting organic light-emitting diode array as light source An exposure apparatus adopting an organic light-emitting diode (OLED) array as a light-emitting source is provided. The apparatus illuminates light beams emitted from a printing head disposed along the lengthwise direction of a photosensitive body to form an electro... | 10/28/2008 |
| 7439999 | Optical scanning apparatus and image-forming apparatus using the same At least one exemplary embodiment is directed to an optical scanning apparatus which includes a Vertical Cavity Surface Emitting Laser including a plurality of light-emitting portions that are spaced from each other in at least a sub-scanning direction, a first opti... | 10/21/2008 |
| 7436425 | Optical writing apparatus and image forming apparatus An optical writing apparatus includes a deflecting part having a deflection plane for deflecting a plurality of light beams, a synchronization detection mirror for reflecting the plurality of light beams from the deflecting part, a synchronization detection part for... | 10/14/2008 |
| 7432947 | Apparatus and method of electrophotographic printing employing diffusive light sources and apparatus and method of scanning a document An electrophotographic imaging system and method employs an array of diffusive light sources, a first lens disposed to receive light emitted from two or more of the light sources of the array, an aperture plate disposed to receive light from the first lens, and a se... | 10/07/2008 |
| 7414645 | Image forming apparatus with scanning lens An image forming apparatus includes a photosensitive member and a scanning lens. The photosensitive member bears a latent image thereon and defines a main scanning direction. The scanning lens transmits a light beam scanningly deflected in the main scanning directio... | 08/19/2008 |
| 7414765 | Optical scanning device and image forming apparatus using the same An optical scanning device deflects, by a common optical deflecting part, a plurality of groups of light beams emitted from a plurality of light sources and directs, by a scanning and imaging optical system, the groups of deflected light beams to respective scan sur... | 08/19/2008 |
| 7397591 | Optical scanner and image forming apparatus An optical scanner includes a light source, an optical coupler, an optical line image unit, a deflector, and an optical scanning unit. The optical scanning unit includes scanning lenses that guide the beams to a surface to be scanned. A surface on the deflector side... | 07/08/2008 |
| 7385181 | Optical scanning device and image forming device Light beams emitted from a plurality of light source devices are deflected by a shared light deflector. The light beams are respectively concentrated on different scanning subjects using a first scanning lens and second scanning lenses and are used to perform a scan... | 06/10/2008 |
| 7385746 | Optical scanning system and image forming apparatus using the same An optical scanning system includes a deflecting device to scanningly deflect a light beam from a light source in a main scan direction, and an imaging optical system for imaging, upon a surface to be scanned, the light beam deflected by a deflecting surface of the ... | 06/10/2008 |
| 7358982 | Imaging device for a printing press An imaging device (10) for a printing form (12), in particular in a printing unit (82) of a printing press (84), having at least one light source (14) and an imaging optics (18) for projecting the at least one light source (... | 04/15/2008 |
