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1. 发明申请

US20210271054A1 IMAGING OPTICAL SYSTEM, CAMERA APPARATUS, AND STEREO CAMERA APPARATUS 有权
公开(公告)号：US20210271054A1
公开(公告)日：2021-09-02
申请号：US17160428
申请日：2021-01-28
申请人： Yukihisa YOKOYAMA
发明人： Yukihisa YOKOYAMA
IPC分类号： G02B13/00 , G02B13/06 , G02B9/60 , G02B27/00
摘要： An imaging optical system consists of: an aperture stop; a first lens group closer to an object than the aperture stop; and a second lens group closer to an image than the aperture stop. The first lens group consists of: a first lens having a meniscus shape with negative power; and a second lens having a meniscus shape with positive power. The second lens group includes a third lens made of plastic and adjacent to the aperture stop. The third lens has a surface that satisfies a formula below: |c3a−c3b|/|c3a>1 where c3a denotes a local curvature near an optical axis, c3b denotes a local curvature at a height of an outermost end of an effective diameter of the third lens.

2. 发明申请

US20150346487A1 OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US20150346487A1
公开(公告)日：2015-12-03
申请号：US14716009
申请日：2015-05-19
申请人： Naoki MIYATAKE , Yukihisa YOKOYAMA
发明人： Naoki MIYATAKE , Yukihisa YOKOYAMA
IPC分类号： G02B26/12 , G02B26/10
CPC分类号： G02B26/125 , G02B26/123 , G02B26/124 , H04N1/0283 , H04N1/04
摘要： An optical scanning device includes plural light sources, a light deflector including a deflecting-reflecting surface, and a scanning optical system including plural folding mirrors and plural scanning lenses, wherein the plural scanning lenses have the same shape, at least one of an optical surface at the incidence side and an optical surface at the emission side has an asymmetric shape with respect to a sub-scanning direction, and has an asymmetric shape in the sub-scanning direction with respect to the main scanning direction, and a difference in a number of folding mirrors disposed between the corresponding scanning lens and the light deflector between light incident on the light deflector from a direction inclined to one side relative to a virtual surface including a normal line of the deflecting-reflecting surface and light incident on the light deflector from a direction inclined to the other side is an odd number.
摘要翻译：光学扫描装置包括多个光源，包括偏转反射表面的光偏转器和包括多个折叠镜和多个扫描透镜的扫描光学系统，其中多个扫描透镜具有相同的形状，光学表面中的至少一个在入射侧，发光侧的光学面相对于副扫描方向具有不对称形状，并且在副扫描方向上相对于主扫描方向具有不对称形状，并且数量差设置在相应的扫描透镜和光偏转器之间的折射镜相对于包括偏转反射表面的法线的入射到光偏转器的虚拟表面和从入射到光偏转器的法线的入射到光偏转器的光从相对于一侧倾斜的方向向另一侧倾斜的方向是奇数。

3. 发明申请

US20150268462A1 OPTICAL SCANNING UNIT AND IMAGE FORMING APPARATUS 审中-公开
标题翻译：光学扫描单元和图像形成装置
公开(公告)号：US20150268462A1
公开(公告)日：2015-09-24
申请号：US14717421
申请日：2015-05-20
申请人： Yukio ITAMI , Yoshinori HAYASHI , Naoki MIYATAKE , Yukihisa YOKOYAMA
发明人： Yukio ITAMI , Yoshinori HAYASHI , Naoki MIYATAKE , Yukihisa YOKOYAMA
IPC分类号： G02B26/12 , G03G15/04 , G02B26/08
CPC分类号： G02B26/124 , B41J2/44 , B41J2/471 , G02B26/0816 , G02B26/12 , G02B26/123 , G03G15/04 , G03G15/043 , H04N1/0032 , H04N1/06 , H04N1/113 , H04N1/50 , H04N2201/0094
摘要： An optical scanning unit includes a rotatable multi-faceted mirror having a plurality of faces reflecting light flux emitted from a light source to scan a scanning area in a main scanning direction. A width of the light flux striking the rotatable multi-faceted mirror is smaller than a length of a face of the rotatable multi-faceted mirror. The entire of light flux striking the rotatable multi-faceted mirror is reflected at a first face when the light flux reflected by the rotatable multi-faceted mirror is directed to the center portion of the scanning area. A part of the light flux striking the rotatable multi-faceted mirror is reflected at the first face while the remaining of the light flux is reflected at a second face when the light flux reflected by the rotatable multi-faceted mirror is directed to a least one of the two end portions of the scanning area.
摘要翻译：光学扫描单元包括可旋转的多面反射镜，其具有反射从光源发射的光束的多个面，以扫描主扫描方向上的扫描区域。撞击可旋转多面反射镜的光束的宽度小于可旋转的多面镜的面的长度。当由可旋转的多面反射镜反射的光束被引导到扫描区域的中心部分时，撞击可旋转多面反射镜的整个光束在第一面反射。撞击可旋转多面反射镜的光束的一部分在第一面反射，而当由可旋转多面反射镜反射的光束被引导到至少一个时，光束的剩余部分在第二面被反射的扫描区域的两个端部。

4. 发明授权

US09019333B2 Optical scanning apparatus and image forming apparatus utilizing a rotational polygon mirror 有权
标题翻译：光学扫描装置和利用旋转多面镜的图像形成装置
公开(公告)号：US09019333B2
公开(公告)日：2015-04-28
申请号：US14160930
申请日：2014-01-22
申请人： Yukio Itami , Yoshinori Hayashi , Naoki Miyatake , Naoto Watanabe , Yukihisa Yokoyama
发明人： Yukio Itami , Yoshinori Hayashi , Naoki Miyatake , Naoto Watanabe , Yukihisa Yokoyama
IPC分类号： B41J2/435 , B41J27/00 , G02B26/12
CPC分类号： G02B26/124 , G02B26/123
摘要： An optical scanning apparatus includes a light source; and a rotational polygon mirror having N reflecting surfaces, the rotational polygon mirror being configured to reflect a light flux emitted from the light source so that a scanning surface is scanned along a main-scanning direction with reflected from the rotational polygon mirror. A width of the light flux incident on the rotational polygon mirror in a direction corresponding to the main-scanning direction is smaller than a width of each reflecting surface of the rotational polygon mirror in the direction corresponding to the main-scanning direction.
摘要翻译：光学扫描装置包括光源; 以及具有N个反射面的旋转多面镜，所述旋转多面镜被配置为反射从所述光源发射的光束，使得沿着所述旋转多面镜反射的主扫描方向扫描表面。沿与主扫描方向相对应的方向入射到旋转多面镜的光束的宽度小于旋转多面反射镜的与主扫描方向对应的方向的各反射面的宽度。

5. 发明申请

US20220236520A1 IMAGE-CAPTURING OPTICAL SYSTEM, CAMERA INCORPORATING THE SAME, AND STEREO CAMERA INCORPORATING THE SAME 有权
公开(公告)号：US20220236520A1
公开(公告)日：2022-07-28
申请号：US17562029
申请日：2021-12-27
申请人： Yukihisa YOKOYAMA
发明人： Yukihisa YOKOYAMA
IPC分类号： G02B9/08 , G02B13/18 , G03B35/08
摘要： An image-capturing optical system includes an aperture stop; a first lens group closer to an object than the aperture stop and composed of multiple glass lenses including a meniscus lens having a negative power closest to the object within the first lens group, and a second lens group closer to an image than the aperture stop. The second lens group includes a first plastic lens, a second plastic lens adjacent to the first plastic lens and closer to the image than the first plastic lens. The second plastic lens has a surface facing the image, in which curvature is positive in vicinity of the optical axis and an absolute value of the curvature increases within a range from the vicinity of the optical axis to an off-axis area of the surface, and a glass lens having positive power closest to the image within the second lens group.

6. 发明授权

US10012830B2 Optical scanning device and image forming apparatus 有权
公开(公告)号：US10012830B2
公开(公告)日：2018-07-03
申请号：US14716009
申请日：2015-05-19
申请人： Naoki Miyatake , Yukihisa Yokoyama
发明人： Naoki Miyatake , Yukihisa Yokoyama
IPC分类号： G02B26/12 , G02B26/10 , H04N1/04
CPC分类号： G02B26/125 , G02B26/123 , G02B26/124 , H04N1/0283 , H04N1/04
摘要： An optical scanning device includes plural light sources, a light deflector including a deflecting-reflecting surface, and a scanning optical system including plural folding mirrors and plural scanning lenses, wherein the plural scanning lenses have the same shape, at least one of an optical surface at the incidence side and an optical surface at the emission side has an asymmetric shape with respect to a sub-scanning direction, and has an asymmetric shape in the sub-scanning direction with respect to the main scanning direction, and a difference in a number of folding mirrors disposed between the corresponding scanning lens and the light deflector between light incident on the light deflector from a direction inclined to one side relative to a virtual surface including a normal line of the deflecting-reflecting surface and light incident on the light deflector from a direction inclined to the other side is an odd number.

7. 发明申请

US20150338641A1 OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US20150338641A1
公开(公告)日：2015-11-26
申请号：US14715842
申请日：2015-05-19
申请人： Yukihisa YOKOYAMA
发明人： Yukihisa YOKOYAMA
IPC分类号： B41J2/385 , G02B26/08
CPC分类号： G02B26/0816 , B41J2/47 , G02B26/0875 , G02B26/105 , G02B26/125 , G03G15/043 , H04N1/0283 , H04N1/113
摘要： An optical scanning device includes: a common optical deflector that deflects light beams from light source devices; and a scanning optical system that focuses the deflected light beams on different scanning surfaces. All the light beams from the light source devices are incident on the optical deflector in directions oblique to a normal line of the scanning surfaces in a main-scanning cross section and to a normal line of a deflecting reflection plane of the optical deflector in a sub-scanning cross section. The scanning optical system includes individual lenses which are individually arranged for the respective light beams and have a plane shape symmetric in the main-scanning direction and satisfies a predetermined condition, and an optical axis of the individual lens is arranged obliquely to the normal line of the scanning surface in the main-scanning cross section so as to satisfy a predetermined condition.
摘要翻译：光学扫描装置包括：使来自光源装置的光束偏转的公共光学偏转器; 以及将偏转的光束聚焦在不同的扫描表面上的扫描光学系统。来自光源装置的所有光束在主扫描横截面中以与扫描表面的法线相反的方向入射到光偏转器上，并且在子扫描横截面中的光偏转器的偏转反射平面的法线扫描横截面。扫描光学系统包括单独的各个透镜，其各自的光束分别布置并且具有在主扫描方向上对称的平面形状并且满足预定条件，并且单独透镜的光轴倾斜地布置在主扫描横截面中的扫描表面以满足预定条件。

8. 发明申请

US20150097910A1 OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME 有权
标题翻译：光学扫描装置和成像装置的图像形成装置
公开(公告)号：US20150097910A1
公开(公告)日：2015-04-09
申请号：US14503556
申请日：2014-10-01
申请人： Yukio ITAMI , Yukihisa Yokoyama , Naoki Miyatake
发明人： Yukio ITAMI , Yukihisa Yokoyama , Naoki Miyatake
IPC分类号： B41J2/385 , G02B26/08
CPC分类号： G03G15/043 , G02B26/123 , G02B26/124 , G02B27/0018
摘要： An optical scanning device including a light source and a rotating polygon mirror having a plurality of reflective surfaces scans a scan area of a surface in a main scanning direction with the light flux emitted from the light source and reflected by the rotating polygon mirror. All the light flux is reflected by a first reflective surface when light flux deflected by the rotating polygon mirror is directed onto a center position of the scan area, and a part of the light flux incident to the rotating polygon mirror is reflected by a second reflective surface adjacent to the first reflective surface when light flux reflected by the rotating polygon mirror is directed onto at least one end of both ends of the scan area and the light flux obliquely enters a plane perpendicular to a rotation axis of the rotating polygon mirror.
摘要翻译：包括光源和具有多个反射表面的旋转多面镜的光学扫描装置利用从光源发射并由旋转多面镜反射的光束扫描主扫描方向上的表面的扫描区域。当由旋转多面反射镜偏转的光束被引导到扫描区域的中心位置时，所有的光通量都被第一反射表面反射，并且入射到旋转多面镜的光束的一部分被第二反射当由旋转多面反射镜反射的光束被引导到扫描区域的两端的至少一端并且光束倾斜地进入垂直于旋转多面镜的旋转轴的平面时，与第一反射表面相邻的表面。

9. 发明申请

US20210011249A1 IMAGING OPTICAL SYSTEM, IMAGING APPARATUS, STEREO CAMERA, DISTANCE MEASURING APPARATUS, AND MOBILE OBJECT 有权
公开(公告)号：US20210011249A1
公开(公告)日：2021-01-14
申请号：US16918163
申请日：2020-07-01
申请人： Yukihisa YOKOYAMA
发明人： Yukihisa YOKOYAMA
IPC分类号： G02B7/02 , G02B9/08
摘要： An imaging optical system includes, sequentially from an object side toward an image side, a first lens group; an aperture stop; and a second lens group. The first lens group includes a negative lens; and a positive lens formed of a plastic lens. The second lens group includes a plastic lens and satisfies Conditional Expressions (1) and (2) as follows: c31a>c32a, and (1) c31b

10. 发明授权

US09279979B2 Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US09279979B2
公开(公告)日：2016-03-08
申请号：US14715842
申请日：2015-05-19
申请人： Yukihisa Yokoyama
发明人： Yukihisa Yokoyama
IPC分类号： G02B26/10 , G02B26/08 , G03G15/043
CPC分类号： G02B26/0816 , B41J2/47 , G02B26/0875 , G02B26/105 , G02B26/125 , G03G15/043 , H04N1/0283 , H04N1/113
摘要： An optical scanning device includes: a common optical deflector that deflects light beams from light source devices; and a scanning optical system that focuses the deflected light beams on different scanning surfaces. All the light beams from the light source devices are incident on the optical deflector in directions oblique to a normal line of the scanning surfaces in a main-scanning cross section and to a normal line of a deflecting reflection plane of the optical deflector in a sub-scanning cross section. The scanning optical system includes individual lenses which are individually arranged for the respective light beams and have a plane shape symmetric in the main-scanning direction and satisfies a predetermined condition, and an optical axis of the individual lens is arranged obliquely to the normal line of the scanning surface in the main-scanning cross section so as to satisfy a predetermined condition.
摘要翻译：光学扫描装置包括：使来自光源装置的光束偏转的公共光学偏转器; 以及将偏转的光束聚焦在不同的扫描表面上的扫描光学系统。来自光源装置的所有光束在主扫描横截面中以与扫描表面的法线相反的方向入射到光偏转器上，并且在子扫描横截面中的光偏转器的偏转反射平面的法线扫描横截面。扫描光学系统包括单独的各个透镜，其各自的光束分别布置并且具有在主扫描方向上对称的平面形状并且满足预定条件，并且单独透镜的光轴倾斜地布置在主扫描横截面中的扫描表面以满足预定条件。

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