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1. 发明专利

JP2002337392A OPTICAL PRINT HEAD, ITS ADJUSTING METHOD AND IMAGING APPARATUS 失效
公开(公告)号：JP2002337392A
公开(公告)日：2002-11-27
申请号：JP2001151971
申请日：2001-05-22
申请人： RICOH KK
发明人： OSUGI TOMOYA
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455
摘要： PROBLEM TO BE SOLVED: To obtain an optical print head having excellent optical characteristics, its adjusting method and an imaging apparatus, which can be mass produced inexpensively by matching positional relation accurately between the optical axis of a focus element array and the emission point of a light emitting element array. SOLUTION: The optical print head for writing an image onto an image carrier with light being emitted from a plurality of light emitting elements arranged on a substrate 302 comprises regulating means 303 and 304 for displacing the substrate 302 in a plane parallel with its light emitting element mounting plane. The regulating means has at least two holes 312 and 313 made in the substrate 302 and pins 314 and 315 being inserted into these holes wherein the pins 314 and 315 may be movable or one pin may be fixed and the other pin may be movable.

2. 发明专利

JP2000267024A MULTIBEAM SCANNER 失效
公开(公告)号：JP2000267024A
公开(公告)日：2000-09-29
申请号：JP6946799
申请日：1999-03-16
申请人： RICOH KK
发明人： SUHARA HIROYUKI , KUBO NOBUAKI , AOKI MASAKANE , ITABASHI AKIHISA , KOJIMA AKIRA , OSUGI TOMOYA
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain a multibeam scanner whose constitution is simple and which can immediately detect, by one scanning, which light emitting source out of the plural light emitting sources of a light beam radiator is abnormal. SOLUTION: A writing scanning is executed by simultaneously making laser light beams respectively modulated and mutually arranged in parallel in a sub-scanning direction incident on a photoreceptor 17 from a semiconductor laser unit 1 having plural LDs and using them for scanning in a main scanning direction. Before the writing scanning action, the laser light beams from the unit 1 obtained by setting all of LDs in a light emitting state are reflected on a mirror 15 and received by a light receiving element 16 whose detection optical path length are different for every laser beam. Then, the obtained luminosity pattern of the received light beams is analyzed by an arithmetic unit 20 based on the previously stored luminosity pattern of the received light beams obtained at the normal light emitting time of the respective LDs so that it is immediately decided which LD is abnormal in an abnormal light emitting state. Thus, it can be quickly and precisely detected by the simple constitution and by one scanning action in the main scanning direction which LD out of the plural LDs of the unit 1 falls into the abnormal light emitting state.

3. 发明专利

JP2000241735A OPTICAL SCANNER 失效
公开(公告)号：JP2000241735A
公开(公告)日：2000-09-08
申请号：JP3937899
申请日：1999-02-18
申请人： RICOH KK
发明人： OSUGI TOMOYA
IPC分类号： B41J2/44 , G02B7/198 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To realize high-speed operation by decreasing or restraining the vibration of large amplitude easily caused in the center part of a reflecting mirror having structure that both ends of a long-length mirror surface covering the scanning range of scanning luminous flux carrying an image are supported. SOLUTION: The reflecting mirror 1 is made longer by specified length in the main scanning direction of scanning light, and supporting members 22 and 23 are provided near an image write utilization range 1w, and supporting members 21 and 24 are provided near the end, then the mirror is pressed to the respective supporting members by a leaf spring 31 from the opposed back surface. The member 23 receives the mirror surface at two upper and lower points and keeps the inclination of the mirror a specified amount. By increasing supporting points 21 and 24 in the main scanning direction, the vibration of the reflecting mirror is decreased. Then, an interval between the members 21 to 24 is made an appropriate distance, and the characteristic frequency of the mirror is deviated from the driving frequency of the motor of a printer main body so as to decrease the vibration.

4. 发明专利

JP2000241726A OPTICAL SCANNER AND IMAGE OUTPUT DEVICE 失效
公开(公告)号：JP2000241726A
公开(公告)日：2000-09-08
申请号：JP4060899
申请日：1999-02-18
申请人： RICOH KK
发明人： ITABASHI AKIHISA , AOKI MASAKANE , KOJIMA AKIRA , SUHARA HIROYUKI , KUBO NOBUAKI , OSUGI TOMOYA
IPC分类号： G03G21/00 , B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To output an image having no void, etc., equal to an image obtained before breakage without spoiling the original output ability of an image output device by constituting an optical scanner so that the scanning amount of a broken light emitting part is compensated by other normal light emitting parts when one part of the light emitting parts is broken or is ruptured. SOLUTION: This optical scanner is constituted so that the scanning amount of the broken light emitting part is compensated by other normal light emitting parts when one part of the light emitting parts is broken or is ruptured. In the optical scanner, a light source 1 having plural light emitting points radiates divergent luminous flux, and the luminous flux is transmitted through a condensing lens 2 and linearly formed into an image near the deflecting and reflecting surface 4a of a deflector 4 by a line image forming optical system 3 after the diameter of the luminous flux is regulated by an aperture part 9. The deflector 4 deflects the incident luminous flux in terms of constant angular velocity. An image forming spot is formed on a medium to be scanned 7 by a composing system of an fθ lens 5 and a long-length lens 6 arranged between the deflector 4 and the medium 7, and the medium 7 is scanned with the image-forming spot by turning the deflector 4.

5. 发明专利

JP2000206434A LIGHT DEFLECTING TYPE SCANNER 失效
公开(公告)号：JP2000206434A
公开(公告)日：2000-07-28
申请号：JP545499
申请日：1999-01-12
申请人： RICOH KK
发明人： OSUGI TOMOYA
IPC分类号： H04N1/04 , G02B26/10 , G03G15/04
摘要： PROBLEM TO BE SOLVED: To eliminate inclination of a latent image which is caused when a photosensitive surface is moved, while a laser beam is used for scanning in a light deflecting type scanner constituted, so that an optical writing action is executed on the photoreceptive surface by deflecting the laser beam for scanning. SOLUTION: This light deflecting type scanner is provided with a light emitting element 3 which emits a laser beam, a light deflector 2 deflecting the laser beam emitted from the element 3 and an image forming element 7 forming the image of the laser beam deflected by the deflector 2 on the photoreceptive surface 1a. Then, scanning action is executed, so that the scanning direction of the laser beam will not orthogonally cross the moving direction of the photoreceptive surface 1a and a terminating end position in a main scanning direction is set at the position deviated in the moving direction of the photosensitive surface 1a, with respect to a starting end position, when the photosensitive surface 1a is moved in a sub-scanning direction by regarding the deflecting and scanning directions of the laser beam as the main scanning direction. Thus, by moving the inclination of the latent image caused while the photosensitive surface moves, the laser beam is scanned, can be eliminated.

6. 发明专利

JP2000137183A LIGHT DEFLECTING SCANNER 失效
公开(公告)号：JP2000137183A
公开(公告)日：2000-05-16
申请号：JP32616798
申请日：1998-10-30
申请人： RICOH KK
发明人： OSUGI TOMOYA
IPC分类号： G02B26/10
摘要： PROBLEM TO BE SOLVED: To provide a light deflecting scanner capable of restraining a temperature rise of image-forming element and improving the vibration-proofing operation. SOLUTION: A light deflector 3 being the main cause of heat generation in the light deflecting scanner 101 is arranged on the outside of an optical box 1, so that the temperature rise of the image-forming element 5 is remarkably restrained. The optical box 1 is subdivided to be small, thereby, the distance between the fixed points of the optical box 1 is made short, and the vibration-proofing ability is improved. Furthermore, since the vibration of the light deflector 3 itself is prevented from being directly transmitted to the optical box, the vibration of the light deflector 3 itself transmitted to the element 5 is reduced.

7. 发明专利

JP2004013021A LIGHT SOURCE DEVICE, LIGHT SOURCE MODULE, OPTICAL SCANNER, AND IMAGE FORMING DEVICE 审中-公开
公开(公告)号：JP2004013021A
公开(公告)日：2004-01-15
申请号：JP2002169167
申请日：2002-06-10
申请人： RICOH KK
发明人： AMADA MIGAKU , OSUGI TOMOYA
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a light source device capable of emitting a plurality of laser beams and to improve the degree of freedom of optical layout in the light source device. SOLUTION: In the light source device 21 constituted of at least one or more laser chips 1 for emitting a plurality of laser beams and a beam combination means 2-1 for emitting the laser beams in an adjacent state, an interval p1 between light emitting points of the laser beams is proportionally converted by the beam combination means 2-1 to proportionally shorten or extend the interval p1. COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2003185959A MULTIBEAM SCANNING OPTICAL SYSTEM AND IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2003185959A
公开(公告)日：2003-07-03
申请号：JP2001381862
申请日：2001-12-14
申请人： RICOH KK
发明人： ONO NOBUAKI , NAKAJIMA TOMOHIRO , ITABASHI AKIHISA , TAKANASHI KENICHI , OSUGI TOMOYA
IPC分类号： B41J2/44 , G02B26/08 , G02B26/10 , G02B26/12 , H01J3/14 , H01J5/16 , H04N1/036 , H04N1/04 , H04N1/113 , H04N1/12 , H04N1/191 , H04N1/50
摘要： PROBLEM TO BE SOLVED: To obtain a multibeam scanning optical system capable of obtaining a good beam pitch and capable of suppressing the occurrence of an abnormal image such as an image of uneven density. SOLUTION: The multibeam scanning optical system is provided with a pair of light sources and several pairs of coupling lenses, and the system satisfies the following expressions; 12.7 COPYRIGHT: (C)2003,JPO

9. 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

10. 发明专利

JP2002205422A IMAGE FORMING APPARATUS 失效
公开(公告)号：JP2002205422A
公开(公告)日：2002-07-23
申请号：JP2001001430
申请日：2001-01-09
申请人： RICOH KK
发明人： OSUGI TOMOYA
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455
摘要： PROBLEM TO BE SOLVED: To prevent lowering of a light emitting efficiency by preventing a temperature rise of a light emitting array even in a small device and to prevent a position shift due to the heat of the light emitting element array. SOLUTION: An air flow generating device 5 that generates an air flow by rotating around a rotation shaft 6 which is extended in the arrangement direction of a light emitting element array 4 from the surface to the innermost of drawing 1 to blow the air flow toward the light emitting element array 4 is provided to a portion in the vicinity of a solid writing device 2 that writes image information on a surface of a photosensitive drum 1 using the light emitting element array 4. As result of the above structure, the temperature of the light emitting element array 4 is not raised to a level that may cause a trouble of the light emitting element array 4.

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