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公开(公告)号：US11327278B2
公开(公告)日：2022-05-10
申请号：US16707997
申请日：2019-12-09
Inventor： Yoshio Matsumura
IPC: G02B9/64 , G02B13/18 , G02B13/04 , H04N5/232 , G02B13/00 , H04N5/225 , G02B13/06 , G02B27/00 , G02B5/00 , G02B13/08
Abstract: A lens system is configured to form an image on an imaging element having a quadrilateral shape disposed on an optical axis, and includes a first free-curved lens being asymmetrical with respect to the optical axis. A free-curved surface of the first free-curved lens has negative refractive power at an intersection point between a circle separated from the optical axis by a length having a predetermined ratio with respect to a minimum image height and a first surface passing through the optical axis and parallel to longer sides of the imaging element, and positive refractive power at an intersection point between a circle separated from the optical axis by a length having the predetermined ratio with respect to the minimum image height and a second surface passing through the optical axis and parallel to shorter sides of the imaging element. The predetermined ratio ranges from 40% to 80% inclusive.
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公开(公告)号：US11310461B2
公开(公告)日：2022-04-19
申请号：US17140202
申请日：2021-01-04
Inventor： Masayuki Aihara , Shigenori Yatsuri , Yoshio Matsumura , Hiroyuki Shobayashi , Katsumi Umeda , Shigeharu Kawamoto , Kazuki Miyama
Abstract: An imaging apparatus is attached to a side of a moving body (for example, vehicle). The imaging apparatus includes an image sensor and an optical system that forms a subject image in a range of a predetermined vertical view angle and a predetermined horizontal view angle on an imaging surface. The optical system forms an image on the imaging surface so as to cause resolution in first region (R1) of the imaging surface to be higher than resolution in second region (R2) different from the first region. A position of center (G1) of first region (R1) is at least one of a position horizontally shifted from a center of the horizontal view angle and a position vertically shifted from a center of the vertical view angle.
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3.发明授权公开(公告)号：US09213219B2
公开(公告)日：2015-12-15
申请号：US14791406
申请日：2015-07-04
Inventor： Satoshi Kuzuhara , Yoshio Matsumura
CPC classification number: G03B17/14 , G02B7/14 , G02B9/12 , G02B9/64 , G02B13/0015 , G02B15/177 , H04N5/2254
Abstract: An inner focus lens system, in order from an object side, comprising: a first lens unit including a most-object-side negative first lens element; a positive second lens unit; and a negative third lens unit, wherein an aperture diaphragm is included, the first lens unit, the third lens unit, and the aperture diaphragm are fixed relative to an image surface in focusing, the second lens unit moves relative to the image surface in the focusing, and the conditions: BF/Y 1.6 (BF: distance from an apex of an image-side surface of a most-image-side lens element to the image surface; Y: maximum image height; TH: distance from an apex of an object-side surface of a most-object-side lens element to the apex of the image-side surface of the most-image-side lens element; f: focal length of the lens system) are satisfied.
Abstract translation: 从物体侧开始的内聚焦透镜系统包括：第一透镜单元，其包括最物体侧负的第一透镜元件; 正第二透镜单元; 以及负的第三透镜单元，其中包括孔径光阑，所述第一透镜单元，所述第三透镜单元和所述孔径光阑在聚焦时相对于图像表面固定，所述第二透镜单元相对于所述图像表面移动 聚焦和条件：BF / Y <1.7和TH / f> 1.6（BF：从最像图像侧透镜元件的图像侧表面的顶点到图像表面的距离; Y：最大图像高度; TH：从物体侧透镜元件的物体侧表面的顶点到最像图像侧透镜元件的像侧表面的顶点的距离; f：透镜系统的焦距） 满意。
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公开(公告)号：US11493739B2
公开(公告)日：2022-11-08
申请号：US16709693
申请日：2019-12-10
Inventor： Yoshio Matsumura
Abstract: A lens system is configured to form an image on an imaging element having a quadrilateral shape disposed on an optical axis, and includes a first free-curved lens being asymmetrical with respect to the optical axis. A free-curved surface of the first free-curved lens has positive refractive power at an intersection point between a circle separated from the optical axis by a length having a predetermined ratio with respect to a minimum image height and a first surface passing through the optical axis and parallel to longer sides of the imaging element, and negative refractive power at an intersection point between a circle separated from the optical axis by a length having the predetermined ratio with respect to the minimum image height and a second surface passing through the optical axis and parallel to shorter sides of the imaging element.
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公开(公告)号：US11493732B2
公开(公告)日：2022-11-08
申请号：US16709644
申请日：2019-12-10
Inventor： Yoshio Matsumura
IPC: G02B9/64 , G02B5/00 , G02B13/18 , G02B9/60 , H04N5/225 , G03B5/00 , G02B13/08 , G02B13/00 , G02B9/62 , G08B13/196
Abstract: A lens system forms an image on an imaging element having a quadrilateral shape disposed on an optical axis. The lens system includes a second free-curved lens being asymmetrical with respect to the optical axis. A sag amount of the second free-curved lens in a circle separated from the optical axis by a length having a predetermined ratio with respect to a minimum image height has extrema outside of a first intersection points between a first surface passing through the optical axis and parallel to longer sides of the imaging element and the circle, and a second intersection point between a second surface passing through the optical axis and parallel to shorter sides of the imaging element and the circle. Each of the extrema is greater than the sag amount at the first intersection point or the second intersection point by 0.01 mm or greater.
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Patent Agency Ranking
公开(公告)号：US11012621B2
公开(公告)日：2021-05-18
申请号：US16699693
申请日：2019-12-01
Inventor： Shigenori Yatsuri , Yoshio Matsumura
Abstract: An imaging device includes a free-form lens having a shape in which (i) in a long-side direction of an imaging element, a resolution that changes along an optical axis long-side resolution curve, and the resolution that changes along a distant point long-side resolution curve in a position away from an optical axis, (ii) in a short-side direction, the resolution that changes along an optical axis short-side resolution curve, and the resolution that changes along a distant point short-side resolution curve in the position away from the optical axis, (iii) the distant point long-side resolution curve follows a shape of the optical axis long-side resolution curve, and has a higher resolution than the optical axis long-side resolution curve, and (iv) the distant point short-side resolution curve follows a shape of the optical axis short-side resolution curve, and has a higher resolution than the optical axis short-side resolution curve.
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公开(公告)号：US12032145B2
公开(公告)日：2024-07-09
申请号：US17117658
申请日：2020-12-10
Inventor： Yoshio Matsumura , Hiroyuki Shobayashi
CPC classification number: G02B15/22 , G02B27/0025 , G03B7/091 , G02B13/009
Abstract: An imaging optical system has an image circle defined on an imaging element. The imaging optical system includes: lens elements arranged from an object side to an image plane side, and a diaphragm arranged between two of the lens elements. The lens elements include freeform lens elements, each having a freeform surface that is an asymmetrical surface with respect to a first cross section and a second cross section, the first cross section being defined by a first direction and an optical axis direction, the second cross section being defined by a second direction and the optical axis direction, the first direction crossing the second direction, and the optical axis direction being orthogonal to the first direction and the second direction. At least two of the freeform lens elements are located on an object side of the diaphragm.
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公开(公告)号：US11906717B2
公开(公告)日：2024-02-20
申请号：US17673017
申请日：2022-02-16
Inventor： Takahiro Kitada , Takehiro Nishioka , Yoshio Matsumura , Takakazu Bito , Kunio Dohno
CPC classification number: G02B15/1461 , G02B7/10 , G02B7/14
Abstract: A zoom lens system includes at least six lens groups, each of which has power. An interval between each pair of lens groups that are adjacent to each other among the at least six lens groups changes while the zoom lens system is zooming. Each of three lens groups, which are respectively located closest, second closest, and third closest to an image plane, out of the at least six lens groups consists of one or more bonded lenses.
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公开(公告)号：US10852516B2
公开(公告)日：2020-12-01
申请号：US16442463
申请日：2019-06-15
Inventor： Masayuki Aihara , Shigenori Yatsuri , Yoshio Matsumura
IPC: G02B13/18 , G01C3/10 , H04N5/225 , G01C11/06 , G02B13/00 , G01B11/24 , G06T7/55 , G01C11/02 , G01C11/30 , G02B3/02
Abstract: An imaging device having an optical system including a free-form surface lens with rotationally asymmetric shape that forms an image on an imaging surface such that a resolution of a first region in front of the predetermined region is higher than a resolution of a second region at a lateral side of the predetermined region. The free-form surface lens has a shape that forms the image such that a resolution of a portion at a predetermined first distance away from a center of the first region in a vertical direction is different from a resolution of a portion at the predetermined first distance away from the center of the first region in a horizontal direction, the vertical direction being orthogonal to the horizontal direction, in the imaging element, in which the first region and the second region are aligned.
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公开(公告)号：US10365462B2
公开(公告)日：2019-07-30
申请号：US15854797
申请日：2017-12-27
Inventor： Masayuki Aihara , Shigenori Yatsuri , Yoshio Matsumura
IPC: G01C3/10 , G02B3/02 , G06T7/55 , G01B11/24 , G01C11/02 , G01C11/06 , G01C11/30 , G02B13/00 , G02B13/18 , H04N5/225
Abstract: A distance measurement system includes: an imaging device including an imaging element where a plurality of imaging pixels are arranged in matrix, and an optical system forming an image of a predetermined region on an imaging surface of the imaging element; and a distance measurer determining a distance to a target object based on data of the image obtained from the imaging element, wherein the optical system includes a free-form surface lens having a rotationally asymmetric shape that forms the image on the imaging surface such that a resolution of a first region in front of the region is higher than that of a second region at a lateral side of the region, each of the resolutions being a ratio of the number of ones of the imaging pixels used to pick up an image included in per unit angle of view to a total number of the imaging pixels.
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