-
-
公开(公告)号：JP5309627B2
公开(公告)日：2013-10-09
申请号：JP2008061860
申请日：2008-03-11
申请人： 株式会社リコー
发明人： 重明 今井
CPC分类号： G02B27/58 , G02B26/125
摘要： An aperture has an aperture opening that transmits a predetermined portion of a light beam. A phase optical element changes a phase of a portion of a light beam. A scanning lens focuses the light beam into a beam spot on a scanning surface. The phase optical element has a function of increasing light intensity of a side-lobe of the scanning beam near the scanning surface. The aperture opening is set to satisfy 0.03
-
公开(公告)号：JP4440700B2
公开(公告)日：2010-03-24
申请号：JP2004130114
申请日：2004-04-26
申请人： 株式会社リコー
摘要： PROBLEM TO BE SOLVED: To effectively reduce the unevenness of pitch of optical spots in a main scanning direction due to the correction of tilt and bend of scanning lines. SOLUTION: In a method of optical scanning, an optical scanning is performed by deflecting a light beam from a light source with an optical deflector, focusing the deflected light beam as a light spot on a surface to be scanned with a scanning and focusing optical system, and the optical scanning is also performed by mechanically and slightly varying the optical path of the deflected light beam in order to correct at least either the tilt or the bend of the scanning lines on the surface to be scanned, and by correcting the positional deviation of the light spot in the main scanning direction on the surface to be scanned due to the slight variation in the optical path by the adjustment of the timing of application of an image signal. COPYRIGHT: (C)2006,JPO&NCIPI
-
公开(公告)号：JP4390200B2
公开(公告)日：2009-12-24
申请号：JP2004218410
申请日：2004-07-27
申请人： 株式会社リコー
摘要： PROBLEM TO BE SOLVED: To provide a multicolor image forming apparatus capable of suppressing color shift or color change in a job, raising quality of an image in a single job and stabilizing quality of an image, an optical scanner, and a method of correcting color shift in the multicolor image forming apparatus. SOLUTION: This multicolor image forming apparatus comprises a color shift detection means 22 for detecting a positional deviation between images respectively corresponding to develop colors, laser beam detectors P1K, P2K for detecting scanning position of a laser beam, and scanning position change means 71, 72, 73 for changing the scanning position of the laser beam in a sub-scanning direction. Each of the laser beam detectors P1K, P2K outputs a change signal for changing the scanning position of the laser beam to the scanning position changing means 71, 72, 73 corresponding to a detected color shift amount and redetects the scanning position of the laser beam corresponding to each of colors before an image is formed. Each of the scanning position change means 71, 72, 73 changes the scanning position again without processing forming of the image when the detected result redetected by the laser beam detector is not less than a set value. COPYRIGHT: (C)2006,JPO&NCIPI
-
-
公开(公告)号：JP5348612B2
公开(公告)日：2013-11-20
申请号：JP2009049441
申请日：2009-03-03
申请人： 株式会社リコー
发明人： 重明 今井
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of stably forming a high-quality image. SOLUTION: The image forming apparatus includes four image stations corresponding to four colors. Each image station has an optical head, a photoreceptor drum, and two positioning devices (first positioning device 110 and second positioning device) regulating a distance between the optical head and the photoreceptor drum. The first positioning device 110 is attached to an end of the optical head K10 in a + Y-axis direction. The first positioning device 110 has two regulation rods (111a and 111b) separating in an X-axis direction and coming into contact with a surface of the corresponding photoreceptor drum K1. The two regulation rods (111a and 111b) change an interval between them in the X-axis direction. COPYRIGHT: (C)2010,JPO&INPIT
-
公开(公告)号：JP5343370B2
公开(公告)日：2013-11-13
申请号：JP2008053948
申请日：2008-03-04
申请人： 株式会社リコー
发明人： 重明 今井
IPC分类号： G02B26/10
CPC分类号： G03G15/326 , B41J2/471 , G02B26/123 , G03G15/0435 , G03G2215/0404
摘要： At least one of a coupling lens and a cylindrical lens has a diffraction lens surface having a ring-band structure with a height h between adjacent ring-bands. The diffraction lens surface has an area A having a shape similar to that of the ring-band structure with a height h′, where h≠h′. The ring-band structure has a function of correcting a fluctuation in focal position of the scanning beam on the scanning surface, and the area A has a function of expanding a focal depth of a light spot on the scanning surface.
-
公开(公告)号：JP4440760B2
公开(公告)日：2010-03-24
申请号：JP2004372233
申请日：2004-12-22
申请人： 株式会社リコー
CPC分类号： H04N1/047 , G02B26/127 , G02B27/0031 , H04N1/1135 , H04N1/12 , H04N2201/0471 , H04N2201/04717 , H04N2201/0476
摘要： An image forming device is disclosed that is able to correct an image distortion even when the installation environment changes or unexpected shocks occur and even when an optical scanning device is exchanged. The image forming device comprises a light source, an optical scanning unit, a development unit, a transfer unit, a test image output unit to output a test image able to determine unevenness of intervals of positions of beam spots formed on an image supporting member, a beam spot position correction unit to correct the unevenness of the beam spot position intervals, and a correction data input unit to select correction data of the unevenness of the beam spot position intervals.
-
公开(公告)号：JP4430314B2
公开(公告)日：2010-03-10
申请号：JP2003038716
申请日：2003-02-17
申请人： 株式会社リコー
CPC分类号： G02B26/125
摘要： A scanning imaging lens includes at least two scanning lenses. Of the scanning lens, the scanning lens that is closer to a deflection unit is formed by resin molding, and has a positive refracting power in the horizontal scanning direction, with zero or close to zero refracting power in the vertical scanning direction, and has a function of correcting constant velocity characteristic in the optical scanning. The scanning lens that is closer to the surface to be scanned has a weak refracting power in the horizontal scanning direction and a strong positive refracting power in the vertical scanning direction, and the linearity Lin of the scanning imaging lens satisfies the condition 2.0
-
公开(公告)号：JP5476659B2
公开(公告)日：2014-04-23
申请号：JP2007240239
申请日：2007-09-14
申请人： 株式会社リコー
发明人： 重明 今井
CPC分类号： G03G15/011 , B41J2/473 , G02B5/189 , G02B26/123 , G02B27/0031 , G03G15/04036 , G03G15/0435 , G03G2215/0404
摘要： A multibeam optical scanning device includes a plurality of light sources; a collimating lens; an aperture; a cylinder lens; a light deflecting unit; a scanning optical system; and a phase adjusting element. The phase adjusting element performs phase adjustments of wavefronts of the light beams to expand a depth allowance without substantially increasing a beam spot size of each of the beam spots on the scanning surface.
-
-
-
-
-
-
-
-
-
搜索结果
31 条记录 (耗时 0.029 秒)
