| Patent Number |
Title Of Patent |
Date Issued |
| RE40109 |
Multi-beam optical scanner |
February 26, 2008 |
| A multi-beam optical scanner, in which a lateral magnification .beta. in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2<.beta..ltoreq.8.5, and a plurality of light spots on the scanned surface ex |
| RE38195 |
Multi-beam optical scanner |
July 22, 2003 |
| A multi-beam optical scanner, in which a lateral magnification .beta. in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2<.beta..ltoreq.8.5, and a plurality of light spots on the scanned surface ex |
| 7616364 |
Scanning optical system, optical scanner, and image forming apparatus having a biconvex lens hav |
November 10, 2009 |
| A scanning optical system includes converges, with a single lens, a divergent luminous flux, which is deflected in a main scanning direction by an optical deflector, on a surface of a scan target. The lens has two surfaces in a biconvex shape in both the main scanning direction and a |
| 7554708 |
Optical scanning device and image forming apparatus |
June 30, 2009 |
| An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects t |
| 7443558 |
Optical scanning device and image forming apparatus |
October 28, 2008 |
| An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects t |
| 7417777 |
Optical scanning device and image forming apparatus |
August 26, 2008 |
| A coupling lens arranged on an optical path of an optical beam from a VCSEL, which has a refraction plane and a diffraction plane that respectively change a power according to a temperature change and suppresses a beam-waist position change in a main-scanning direction and a sub-scan |
| 7411712 |
Optical scanner and image formation apparatus |
August 12, 2008 |
| An optical scanner has light source units spaced from each other along a first direction and having optical axes parallel to each other. Positions from which the light beams are emitted are spaced from each other by a predetermined distance at least along a predetermined direction. The |
| 7362486 |
Optical scanning device with at least one resin lens for controlling a beam waist position shift |
April 22, 2008 |
| A first optical system guides a light beam from a light source to an optical deflector, and a second optical system converges the light beam deflected by the optical deflector on a surface to be scanned. The first optical system includes at least one resin lens having a diffractive s |
| 7330296 |
Synchronous detector, optical scanner, and image forming apparatus |
February 12, 2008 |
| A synchronous detector detects timing of scanning by an optical scanner in an image forming apparatus. The optical scanner has a light source that emits a light beam, a deflecting unit that deflects the light beam, a scanning optical element that focuses the light beam deflected by the |
| 7253937 |
Multi-beam optical scanning device and image forming apparatus |
August 7, 2007 |
| 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 coupling the light beams |
| 7215354 |
Scanning optical system, optical scanning device and image forming apparatus |
May 8, 2007 |
| A scanning optical system condensing a beam deflected by an optical deflector so as to form a beam spot on a surface to be scanned, comprises two lenses. A lens on the side of optical deflector has a negative refracting power in sub-scanning direction. A lens on the side of surface t |
| 7068407 |
Optical element, optical scanner and image forming apparatus |
June 27, 2006 |
| An optical element can effectively correct misalignment of focused positions of optical spots and an optical spot pitch deviation with respect to image heights due to a refractive index distribution therein. The optical element includes a lens, which serves as an optical system in an |
| 7038822 |
Optical element, optical scanner and image forming apparatus |
May 2, 2006 |
| An optical element can effectively correct misalignment of focused positions of optical spots and an optical spot pitch deviation with respect to image heights due to a refractive index distribution therein. The optical element includes a lens, which serves as an optical system in an |
| 7034973 |
Scanning optical system, optical scanning device, and image forming apparatus |
April 25, 2006 |
| A scanning optical system condensing a light flux deflected by an optical deflector so as to form an optical spot on a surface to be scanned, includes a unitary lens, wherein: a lens configuration in a main scanning cross section is both surfaces with a convex configuration; a lens c |
| 7006120 |
Multi-beam optical scanning apparatus and image forming apparatus |
February 28, 2006 |
| A multi-beam optical scanning apparatus includes a semiconductor laser array slanted relative to a sub-scanning direction and emitting a plurality of optical beams; a coupling lens converting a shape of each optical beam emitted from the semiconductor laser array; and an aperture wit |
| 6999208 |
Optical scanner, optical scanning method, scanning image forming optical system, optical scannin |
February 14, 2006 |
| An optical scanner which performs optical scanning of a surface to be scanned by deflecting a luminous flux having a wavelength .lamda. from a light source by means of an optical deflector, and condensing the deflected flux toward the surface to be scanned through a scanning image fo |
| 6937371 |
Optical scanner and image formation apparatus |
August 30, 2005 |
| An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third include |
| 6903855 |
Multi-beam scanning method, apparatus and multi-beam light source device achieving improved scan |
June 7, 2005 |
| A multi-beam scanning method for scanning a scanning surface with a plurality of beams which are formed into a plurality of beam spots separated from each other in a sub scanning direction includes providing n number of semiconductor laser array units, each of the n number of semicon |
| 6856438 |
Optical scanning lens and apparatus capable of effectively generating accurately-pitched light s |
February 15, 2005 |
| An optical scanning lens used in a multi-beam scanning optical apparatus including a first mechanism reforming the light beams into line images, a deflecting mechanism reforming the light beams into multiple scanning beams, and a second mechanism reforming the multiple scanning beams int |
| 6806984 |
Optical scanning apparatus capable of reducing variations in shading and improving light usage |
October 19, 2004 |
| An optical scanning apparatus reduces shading and variations in light intensity and significantly increases light usage during an optical scanning process using a simple construction in which a laser beam from a light source is deflected by a light deflector having a reflective surface |
| 6801351 |
Optical scanning device, line-image forming optical system therein, imaging adjustment method in |
October 5, 2004 |
| A light source emitting a light flux; a coupling optical system couples the light flux from the light source to a subsequent optical system by transforming it into a parallel light flux, an approximately convergent light flux or an approximately divergent light flux; a light deflector |
| 6800845 |
Multi-beam scanning device, multi-beam scanning method, light source device, and image forming a |
October 5, 2004 |
| In a multi-beam scanning device and method of the present invention, a semiconductor laser array having a plurality of light emitting parts emitting multiple laser beams is provided. A rotary deflector deflects the laser beams emitted by the light emitting parts of the semiconductor lase |
| 6781729 |
Optical scanning system with unvarying image surface under environmental temperature change |
August 24, 2004 |
| An optical scanning device employing a scanning imaging optical system that includes a first optical system configured to receive a light flux emitted from a light source, and a second optical system configured to condense the light flux to form a long linear image in a main scanning dir |
| 6771407 |
Optical scanner and image formation apparatus |
August 3, 2004 |
| An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third include |
| 6704129 |
Optical scanning apparatus capable of reducing variations in shading and improving light usage |
March 9, 2004 |
| An optical scanning apparatus reduces shading and variations in light intensity and significantly increases light usage during an optical scanning process using a simple construction in which a laser beam from a light source is deflected by a light deflector having a reflective surface |
| 6606179 |
Optical scanning device, line-image forming optical system therein, imaging adjustment method in |
August 12, 2003 |
| A light source emitting a light flux; a coupling optical system couples the light flux from the light source to a subsequent optical system by transforming it into a parallel light flux, an approximately convergent light flux or an approximately divergent light flux; a light deflector |
| 6596985 |
Multi-beam scanning device, multi-beam scanning method, light source device, and image forming a |
July 22, 2003 |
| In a multi-beam scanning device and method of the present invention, a semiconductor laser array having a plurality of light emitting parts emitting multiple laser beams is provided. A rotary deflector deflects the laser beams emitted by the light emitting parts of the semiconductor lase |
| 6509995 |
Optical scanning device, line-image forming optical system therein, imaging adjustment method in |
January 21, 2003 |
| A light source emitting a light flux; a coupling optical system couples the light flux from the light source to a subsequent optical system by transforming it into a parallel light flux, an approximately convergent light flux or an approximately divergent light flux; a light deflector |
| 6448998 |
Scanning and imaging lens, optical scanning device and image forming apparatus |
September 10, 2002 |
| A scanning and imaging lens condensing a light flux deflected by a deflector onto a surface to be scanned as a beam spot, has a plurality of lenses. A shape in main scanning cross section of each of both surfaces of a lens on a side of deflector has a convex shape, and a shape in main |
| 6388792 |
Optical scanning device and image forming apparatus |
May 14, 2002 |
| An optical scanning device deflects one or a plurality of light flux(es) originating from a light source by an optical deflecting unit, gathers the deflected light flux(es) to cause it(them) to form a beam spot(s) on a surface to be scanned by a scanning and image-forming optical system, |
| 6366384 |
Multi-beam scanning method, apparatus and multi-beam light source device achieving improved scan |
April 2, 2002 |
| A multi-beam scanning method for scanning a scanning surface with a plurality of beams which are formed into a plurality of beam spots separated from each other in a sub scanning direction includes providing n number of semiconductor laser array units, each of the n number of semicon |
| 6348989 |
Scanning image forming lens and optical scanning apparatus |
February 19, 2002 |
| A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction corresponding to a main scanning direction via an optical deflector at equiangular velocity. The sc |
| 6348988 |
Scanning image forming lens and optical scanning apparatus |
February 19, 2002 |
| A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction corresponding to a main scanning direction via an optical deflector at equiangular velocity. The sc |
| 6347004 |
Optical scanning apparatus and scanning image forming lens |
February 12, 2002 |
| An optical scanning apparatus includes a light source for outputting light, a first lens system arranged to receive the light output from the light source and to transmit a light flux therefrom, an optical deflector arranged to receive the light flux from the first lens system and having |
| 6288819 |
Scanning image forming lens and optical scanning apparatus |
September 11, 2001 |
| A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction corresponding to a main scanning direction via an optical deflector at equiangular velocity. The sc |
| 6256133 |
Optical scanning apparatus |
July 3, 2001 |
| An optical scanning apparatus is constructed such that a light beam from a light source is formed into a linear image extending in a main scanning direction and is caused to be deflected at a constant velocity by virtue of a light deflecting system having a deflective reflecting surface |
| 6229638 |
Optical scanning apparatus capable of reducing variations in shading and improving light usage |
May 8, 2001 |
| An optical scanning apparatus reduces shading and variations in light intensity and significantly increases light usage during an optical scanning process using a simple construction in which a laser beam from a light source is deflected by a light deflector having a reflective surface |
| 6166842 |
Scanning image forming lens and optical scanning apparatus |
December 26, 2000 |
| A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction corresponding to a main scanning direction via an optical deflector at equiangular velocity. The sc |
| 5999345 |
Multi-beam light source unit |
December 7, 1999 |
| A multi-beam light source unit includes a light source section having a plurality of semiconductor lasers, a plurality of collimating lenses for collimating light beams emitted from the semiconductor lasers, and a supporting member for supporting the plurality of semiconductor lasers and |
| 5831758 |
Multi-beam optical scanner |
November 3, 1998 |
| A multi-beam optical scanner, in which a lateral magnification .beta. in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2<.beta..ltoreq.8.5, and a plurality of light spots on the scanned surface ex |
