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1. 发明专利

JP4378193B2 Multi-beam optical scanning device and an image forming apparatus using the same 有权
公开(公告)号：JP4378193B2
公开(公告)日：2009-12-02
申请号：JP2004065790
申请日：2004-03-09
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , B41J2/435 , B41J2/47 , G02B26/12 , G03G15/00 , H04N1/036 , H04N1/113
CPC分类号： B41J2/473
摘要： An object is to obtain a multi-beam optical scanning apparatus in which a displacement of an image location of each of light beams emitted from a plurality of light emitting portions is reduced, and which is suitably usable in a high-speed and high-image-quality application, and an image forming apparatus using the multi-beam optical scanning apparatus. A multi-beam optical scanning apparatus includes a light source unit 1 having plural light emitting portions disposed with being spaced from each other in a main-scanning direction, a first optical system 2 for changing conditions of plural divergent light beams emitted from the light source unit, a stop 3 for restricting widths of the plural light beams transmitted through the first optical system, a deflecting unit 5 for reflecting the plural light beams restricted by the stop, a second optical system 6 for forming images of the plural light beams reflected by the deflecting unit on a surface 7 to be scanned, and a detecting unit for detecting a writing start position synchronous signal for controlling a timing of a scanning start position on the surface to be scanned. The individual elements are designed so as to satisfy a predetermined condition.

2. 发明专利

JP4174171B2 Multi-beam scanning optical system and an image forming apparatus using the same 有权
公开(公告)号：JP4174171B2
公开(公告)日：2008-10-29
申请号：JP2000181481
申请日：2000-06-16
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , G02B13/00 , G02B13/08 , G02B13/18 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To reduce deviation of an image forming position in a main scanning direction and to obtain excellent image forming characteristic by inclining respective beams made incident on a surface to be scanned so that the main light beam of them may form an angle which is not zero with the normal of the surface to be scanned in a subscanning direction and making them incident on the surface to be scanned. SOLUTION: In this multibeam scanning optical system, the angle formed by the main light beam of plural beams made incident on the surface to be scanned (photoreceptor drum) with a normal of the surface to be scanned, a distance Sd from the back side principal plane 11 of an fθ lens system 6 to a natural converging point 14 of converged beam made incident on the lens system 6, and a distance Sk or the like from the plane 11 of the lens system 6 to a position 12 where the converged beam made incident on the lens system 6 is converged and formed into an image by the lens system 6 are optimally set. Thus, the deviation of the image forming position in the main scanning direction of plural spots is nearly perfectly cancelled all over the surface to be scanned without deteriorating the image forming characteristic (spot shape) at all.

3. 发明专利

JP5669434B2 回折素子及び回折素子の製造方法及びそれを用いた分光器有权
标题翻译：用于制造衍射元件和衍射元件，并使用相同的分光方法
公开(公告)号：JP5669434B2
公开(公告)日：2015-02-12
申请号：JP2010107105
申请日：2010-05-07
申请人：キヤノン株式会社
发明人：石部　芳浩 , 芳浩石部
IPC分类号： G02B5/18 , G01J3/20 , G01N21/27 , G01N21/47
CPC分类号： B23C3/00 , B23C2226/31 , G01J3/18 , G01J3/20 , G01J3/50 , G02B5/1842 , G02B5/1861 , G02B27/0944

4. 发明专利

JP4497618B2 Light scanning optical system and the optical scanning device and an image forming apparatus using the same 有权
公开(公告)号：JP4497618B2
公开(公告)日：2010-07-07
申请号：JP2000023867
申请日：2000-02-01
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12
CPC分类号： G02B26/12

5. 发明专利

JP4324019B2 Optical scanning device and an image forming apparatus using the same 有权
公开(公告)号：JP4324019B2
公开(公告)日：2009-09-02
申请号：JP2004164645
申请日：2004-06-02
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , H04N1/113
CPC分类号： G02B26/12
摘要： The present invention provides a high-performance and compact overfilled optical scanning apparatus and an image forming apparatus using the same. In an optical scanning apparatus having an incidence optical system for causing a light beam emitted from light source unit to be incident on the deflection surface of a light deflector having a plurality of deflection surfaces, in a converged state with a light beam width in a main scanning section wider than that of the deflection surface, and an imaging optical system for imaging the light beam reflected and deflected by the light deflector on a surface to be scanned, and for forming an image on the surface to be scanned, each element is appropriately set to satisfy the conditional expression, where f is the focal length of the imaging optical system in a main scanning direction, Sk is the distance in the main scanning section from the rear principal plane position of the imaging optical system to an imaging point of the converged light beam, alpha and beta are angles in the main scanning section formed by the optical axis of the imaging optical system and the principal ray of the light beams incident on and reflected by the light deflector, respectively, delta L is the unevenness of distances in the main scanning section from the rotation center of the light deflector to the deflection surfaces, and NM is the number of pixels per one inch in the main scanning direction on the surface to be scanned.

6. 发明专利

JP3466863B2 Scanning optical apparatus and an image recording apparatus using the same 失效
公开(公告)号：JP3466863B2
公开(公告)日：2003-11-17
申请号：JP7893297
申请日：1997-03-13
申请人：キヤノン株式会社
发明人：加藤　　学 , 浩二星 , 芳浩石部 , 和夫藤林
IPC分类号： G02B26/10 , G02B13/00 , G02B13/18 , G02B26/12
CPC分类号： G02B26/125 , G02B13/0005

7. 发明专利

JP5164345B2 Optical scanning device and an image forming apparatus using the same 有权
公开(公告)号：JP5164345B2
公开(公告)日：2013-03-21
申请号：JP2006198159
申请日：2006-07-20
申请人：キヤノン株式会社
发明人：芳浩石部 , 貴久加藤 , 進安田
IPC分类号： G02B26/10 , B41J2/44 , G02B17/08 , H04N1/036
CPC分类号： G02B26/105 , G02B26/0833 , H04N1/02815

8. 发明专利

JP4883795B2 Multi-beam optical scanning device and an image forming apparatus using the same 有权
公开(公告)号：JP4883795B2
公开(公告)日：2012-02-22
申请号：JP2007170252
申请日：2007-06-28
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： G02B26/10 , B41J2/44 , G03G15/04 , H04N1/113
CPC分类号： G02B26/125 , B41J2/473 , G02B26/123 , H04N1/1135 , H04N1/1911 , H04N2201/0082
摘要： A multi-beam optical scanning device which enables uniform scan line pitch and high precision image, includes a light source (1) having plural light emitting members, a rotary polygonal mirror (5) having a deflecting surface, a first optical system (LA) for imaging a light beam on the deflecting surface and a second optical system (6) for imaging the light beam on a scan surface (7) to be scanned, wherein the optical axis of the first optical system is disposed at a particular angle in a sub-scan section with respect to a plane perpendicular to the deflection axis of the deflecting surface, and wherein, with respect to the imaging magnification in the sub-scan section of the second optical system on the optical axis and between the deflecting surface and the scan surface, the imaging magnification at a scan start side is made large while the imaging magnification at the scan end side is made small or, alternatively, the imaging magnification at a scan start side is made small while the imaging magnification at the scan end side is made large.

9. 发明专利

JP4115104B2 Multi-beam scanning optical system and an image forming apparatus using the same 有权
公开(公告)号：JP4115104B2
公开(公告)日：2008-07-09
申请号：JP2001198263
申请日：2001-06-29
申请人：キヤノン株式会社
发明人：博樹吉田 , 圭一郎石原 , 芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , B41J2/47 , G02B26/12 , H04N1/036 , H04N1/113
CPC分类号： B41J2/473 , G02B26/123
摘要： It is an object of the present invention to provide a multi-beam scanning optical system, which can reduce relative deviation of a writing position of each light-emitting portion due to focus deviation of a synchronization detection optical device, and an image forming apparatus using the same. In the multi-beam scanning optical system having the synchronization detection optical device including a light source device, an incident optical device, a deflection device, a scanning optical device and a slit, each element is set such that relative deviation of a writing position of each light beam due to deviation of a focus position within a main scanning cross section is reduced by a first light beam limiting element provided between the deflection device and the slit and a conditional expression is satisfied.

10. 发明专利

JP3740339B2 Light scanning optical system and multi-beam optical scanning optical system and an image forming apparatus using the same 有权
公开(公告)号：JP3740339B2
公开(公告)日：2006-02-01
申请号：JP35564899
申请日：1999-12-15
申请人：キヤノン株式会社
发明人：芳浩石部
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a light scanning optical system and a multibeam scanning optical system that a printing position is not deviated in a main scanning direction and accurate printing quality can be obtained and image forming device using it. SOLUTION: This light scanning optical system is provided with a first optical system 12 shaping luminous flux emitted from a light source means 1 and forming the image thereof as the linear luminous flux being long in the main scanning direction, a light deflector 5 having a deflecting surface near the image forming position of the optical system 12 and deflecting the incident luminous flux in the main scanning direction for scanning, a second optical system 6 forming the image of the luminous flux reflected and deflected by the deflector 5 on a surface to be scanned and making relation between the deflecting surface of the deflector 5 and the surface to be scanned almost conjugate and a writing start position synchronizing signal detection means 11 controlling the timing of a scanning start position on the surface to be scanned by using one part of the luminous flux reflected and deflected by the deflector 5. Then, a luminous flux restriction means 8 restricting one part of the luminous flux made incident on the detection means 11 is arranged in an optical path between the deflector 5 and the detection means 11.

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