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1. 发明专利

JP2002156594A MULTIBEAM LIGHT SOURCE DEVICE, MULTIBEAM SCANNER AND IMAGE FORMING DEVICE 失效
公开(公告)号：JP2002156594A
公开(公告)日：2002-05-31
申请号：JP2000354044
申请日：2000-11-21
申请人： RICOH KK
发明人： SAKAI KOJI , SUZUKI SEIZO , ATSUMI HIROMICHI , ITABASHI AKIHISA
IPC分类号： B41J2/44 , G02B13/00 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To realize a multibeam light source device which is totally new as compared with a conventional one. SOLUTION: This multibeam light source device is used in a multibeam scanner by which a surface to be scanned is simultaneously scanned with plural light spots mutually separated in a subscanning direction, and possesses a semiconductor laser light source having plural semiconductor laser light emitting parts 31, 32 and 33 and a reflection optical device 34 to reflect a light beam from each semiconductor laser light emitting part of the semiconductor laser light source, and the reflection optical device 34 possesses plural reflection surfaces inclined to a reference axis, and a positional relation between the semiconductor laser light emitting parts 31, 32 and 33 of the semiconductor laser light source and the reflection optical device 34 is decided so that the light beam from each semiconductor laser light emitting part is reflected as the light beam having a component in a reference axis direction by a corresponding reflection surface by making one or more semiconductor laser light emitting parts of the semiconductor laser light source correspond to each reflection surface of the reflection optical device.

2. 发明专利

JP2000260355A DISPLAY 失效
公开(公告)号：JP2000260355A
公开(公告)日：2000-09-22
申请号：JP5942299
申请日：1999-03-05
申请人： RICOH KK
发明人： SAKAI KOJI
IPC分类号： H01J29/88 , B32B9/00 , G02F1/1333
摘要： PROBLEM TO BE SOLVED: To spontaneously remove contamination without wiping off it with cloth and to provide a good image quality by providing a transparent coating layer having contamination resistance with ultraviolet radiation on a display surface of a display. SOLUTION: The display surface of a display, for preventing fat-and-oil contamination due to electrostatic adhesion, is applied with a transparent coating layer containing metal oxide photo semiconductor particles such as anatase-type TiO2 that provides contamination resistance by decomposing the contamination to carbon dioxide and water with ultraviolet radiation. For example, a transparent glass or plastic surface such as a CRT or a liquid crystal display panel is coated with a resin paint containing photo-catalytic metal oxide particles and is baked and cured to form a contamination resistant coating layer at this photocatalyst. Thickness of this coating layer is set thinner than 0.2 μm based on wavelength of light, coloring caused by interference of light in this layer can be prevented, and transparency increase with thinner coating. In addition, a protective film with abrasion resistance or corrosion resistance can be applied for securing abrasion resistance, if necessary.

3. 发明专利

JP2000131632A OPTICAL SCANNING SYSTEM AND OPTICAL SCANNING DEVICE 失效
公开(公告)号：JP2000131632A
公开(公告)日：2000-05-12
申请号：JP30086898
申请日：1998-10-22
申请人： RICOH KK
发明人： AOKI MASAKANE , SAKAI KOJI
IPC分类号： H04N1/113 , G02B13/00 , G02B26/10 , G02B26/12
摘要： PROBLEM TO BE SOLVED: To realize optical scanning by which high density scanning is made possible while securing the back length of a scanning optical system. SOLUTION: This is an optical system condensing a beam deflected by an optical deflector 5 on a surface to be scanned 9 as a light spot, and is constituted of two lenses 6 and 7, and the lens 6 on the side of the optical deflector 5 possesses positive refracting power in a horizontal scanning direction and negative refracting power in a vertical scanning direction, and the lens 7 on the side of the surface to be scanned possesses the positive refracting power in the vertical scanning direction. The lateral magnification β2 of the center image height of the scanning optical system in the vertical scanning direction satisfies the condition of 0.5

4. 发明专利

JPH11218699A MULTIBEAM OPTICAL SCANNER 失效
公开(公告)号：JPH11218699A
公开(公告)日：1999-08-10
申请号：JP2232198
申请日：1998-02-03
申请人： RICOH KK
发明人： UEDA TAKESHI , HAYASHI YOSHIAKI , SAKAI KOJI
IPC分类号： G02B26/10
摘要： PROBLEM TO BE SOLVED: To provide a multibeam optical scanner which has a small number of parts and is low-cost and makes plural beam shapes and shading characteristics coincide with each other and reduces shading. SOLUTION: This multibeam optical scanner is provided with at least two light emission parts 1, a coupling lens 2, an aperture 3, a polarizing beam splitter 5, a deflector 8, and an image forming optical element 9. In this case, the aperture 3 is provided between the coupling lens 2 and the polarizing beam splitter 5, and the inner hole of the aperture is made smaller than the part where ranges, where peak intensities of light beams are higher than a value prescribed by 1/e , overlap at the time of aligning the center of the light beam from each light emission part 1 with that of the inner hole of the aperture.

5. 发明专利

JPH1054950A MULTIBEAM OPTICAL SCANNING DEVICE 失效
公开(公告)号：JPH1054950A
公开(公告)日：1998-02-24
申请号：JP233497
申请日：1997-01-09
申请人： RICOH KK
发明人： SAKAI KOJI , AOKI MASAKANE
IPC分类号： B41J2/44 , G02B13/18 , G02B13/24 , G02B26/10 , G02B26/12 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a light spot of good shape on a surface to be scanned and to effectively reduce the lowering of image quality of a recording image due to the deviation of pitch in a multibeam optical scanning device. SOLUTION: Plural light beams from a monolithic light source for multibeam 1, arranging plural LD light emitting parts 1a, 1b in the corresponding direction to sub-scanning, are collimated by a collimator lens 2, converged in the corresponding direction to sub-scanning by a first image forming system 3, plural long linear images are formed in the corresponding direction to main scanning, deflected by an optical deflector having a deflecting reflection surface 4 near the image forming position of the linear image, converged on the surface to be scanned as plural light spots separated in the sub-scanning direction from each other by a second image forming systems 50, 6 and optical scanning is performed. In this case, the lateral magnification β in the corresponding direction to sub-scanning in the synthetic system of optical systems between the multibeam source 1 and the surface to be scanned satisfys the condition: 2

6. 发明专利

JP2003262807A OPTICAL DEVICE FOR MULTIBEAM OPTICAL SCANNING, MULTIBEAM OPTICAL SCANNER AND IMAGE FORMING APPARATUS USING THE OPTICAL DEVICE 审中-公开
公开(公告)号：JP2003262807A
公开(公告)日：2003-09-19
申请号：JP2002062197
申请日：2002-03-07
申请人： RICOH KK
发明人： TAKANASHI KENICHI , SAKAI KOJI
IPC分类号： B41J2/44 , G02B3/00 , G02B13/00 , G02B13/18 , G02B26/10 , G02B26/12 , G02B27/00 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain an optical device for multibeam optical scanning capable of effectively correcting the interval and the interval deviation of a light spot on a surface to be scanned, and to obtain a multibeam optical scanner and an image forming apparatus using the optical device. SOLUTION: In the optical device for an optical scanner, a plurality of light beams emitted from a light source 1 are formed into a line image long in a main scanning direction by a 1st optical system and deflected by a light deflector 5 having a deflection and reflection surface near a line image forming position, and the deflected light beam is condensed as the light spot on the surface to be scanned by 2nd optical systems 6 and 7. The optical device is a lens having uneven refractive index distribution included in the 2nd optical system, and satisfies (m-1)×PLs×V/WLs≤2.3×10 -6 when it is assumed that the number of multibeam made incident on the lens is (m), the main light beam pitch of the multibeam in a subscanning direction on the incident surface is PLs, the refractive index distribution is V, and the effective area in the subscanning direction of the lens corresponding to effective write-in width: W (mm) on the surface to be scanned is WLs. COPYRIGHT: (C)2003,JPO

7. 发明专利

JP2003182153A LIGHT SOURCE UNIT 审中-公开
公开(公告)号：JP2003182153A
公开(公告)日：2003-07-03
申请号：JP2001390602
申请日：2001-12-21
申请人： RICOH KK
发明人： MIYATAKE NAOKI , OSUGI TOMOYA , TAKANASHI KENICHI , SAKAI KOJI
IPC分类号： B41J2/44 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain a stabilized beam spot by adjusting the position of a light beam with high accuracy including the beam spot interval thereof in the subscanning direction, and suppressing variation of beam spot diameter incident to positional adjustment of the light beam. SOLUTION: A coupling lens CL is bonded, at four points of 90° interval on the circumferential surface thereof, to the lens supporting parts SM1-SM4 of a light source holding member through an adhesive layer GL. At the time of environmental variation, stresses are generated from four bonded parts, respectively. Positional variation of the coupling lens CL is canceled by a force from the opposite direction and reduced. When the coupling lens CL is secured eccentrically to the light source holding member, and the adhesive layer GL between the coupling lens CL and the light source holding member is shifted, a force is generated in the suppressing direction from other part for holding/ bonding the coupling lens CL. COPYRIGHT: (C)2003,JPO

8. 发明专利

JP2003131153A OPTICAL SCANNER AND IMAGE FORMING DEVICE 审中-公开
公开(公告)号：JP2003131153A
公开(公告)日：2003-05-08
申请号：JP2001326359
申请日：2001-10-24
申请人： RICOH KK
发明人： SUZUKI SEIZO , AMADA MIGAKU , SAKAI KOJI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain a multibeam type optical scanner and an image forming device capable of yielding a high-quality image excellent in color reproducibility in color image formation and having little irregular density by reducing the fluctuation of a scanning position caused by the change in the ambient temperature and change with time and the fluctuation of a pitch between multibeams. SOLUTION: This optical scanner has a plurality of coupling lenses 3 coupling beams radiated from a plurality of semiconductor lasers 1, a light deflector deflecting the beam by the use of a deflection and reflection surface, a deflector front optical system condensing the beam from the lenses 3 nearly like a line long in a main scanning corresponding direction near the deflection and reflection surface of the light deflector, a scanning optical device condensing the deflected beam by the light deflector as a light spot on a surface to be scanned, a detection means detecting the scanning position of the light spot on the surface to be scanned, and a control means performing feedback-control so that the scanning position of each light spot may be an aimed position. It has a plurality of light emitting parts 21, 22, 23 and 24 where the semiconductor laser 1 and the lens 3 are integrally held, and each light emitting part has a driving part 6 independently adjusted.

9. 发明专利

JP2001324689A MULTIBEAM SCANNING OPTICAL SYSTEM, MULTIBEAM SCANNING DEVICE, MULTIBEAM SCANNING METHOD AND IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001324689A
公开(公告)日：2001-11-22
申请号：JP2000098015
申请日：2000-03-31
申请人： RICOH KK
发明人： SUZUKI SEIZO , ATSUMI HIROMICHI , SAKAI KOJI , AOKI MASAKANE
IPC分类号： B41J2/44 , G02B13/24 , G02B26/10 , G02B26/12
摘要： PROBLEM TO BE SOLVED: To realize an excellent small-diameter light spot, the high degree of freedom in the layout of optical arrangement and excellent light utilization efficiency required for high speed scanning in multibeam scanning. SOLUTION: This multibeam scanning optical system is provided with a 1st optical system 2 coupling plural beams from a light source side to succeeding optical systems, a 2nd optical system 4 forming the respective beams coupled by the 1st optical system into a line image long in a main scanning direction and separate from each other in a subscanning direction, a light deflector 5 having a deflecting reflection surface near a position where the line image is formed and deflecting the respective beams, and 3rd optical systems 6 and 7 condensing the respective beams deflected by the light deflector 5 onto a surface to be scanned 8 and forming the light spot separated from each other in the subscanning direction on the surface 8. When a pitch in the subscanning direction of a light emitting source in a light source 1 is defined as P1, the pitch of a pixel on the surface 8 is defined as P2 and a skip order is defined as m(>=1), they satisfy a condition: (1) 0.1

10. 发明专利

JP2001242403A MULTI-BEAM OPTICAL SCANNER AND IMAGE-FORMING DEVICE 失效
公开(公告)号：JP2001242403A
公开(公告)日：2001-09-07
申请号：JP2000054966
申请日：2000-02-29
申请人： RICOH KK
发明人： SAKAI KOJI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a multi-beam optical scanner which can the scanning line pitch of a scanning line on a surface to be scanned correct deviations of with high accuracy, which caused by an error in mounting of the second optical system, etc. SOLUTION: The multi-beam optical scanner is provided which is equipped with a light source device 2, cylindrical lenses 3a and 3b, a rotating polygon mirror (polygon mirror) and lens 5 and 6, and which can correct the deviation of the scanning line pitch of the scanning line on the surface to be scanned with high accuracy by performing rotation adjustment of the cylindrical lenses 3a and 3b composing the second optical system, in an optical axis direction.

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