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公开(公告)号：US10088340B2
公开(公告)日：2018-10-02
申请号：US15262412
申请日：2016-09-12
Applicant: Mitutoyo Corporation
Inventor： Kimitoshi Ono
Abstract: A photoelectric encoder of the present invention includes: a scale which includes a grid scale; a light emitting portion which irradiates light toward the scale; a light receiving portion which detects an image of the grid scale of the scale; and a telecentric optical unit which is provided between the scale and the light receiving portion and forms the image of the grid scale on the light receiving portion, wherein the telecentric optical unit includes a first optical element which is disposed near the scale, a second optical element which is disposed near the light receiving portion in relation to the first optical element and is disposed so that a gap is formed between the second optical element and the first optical element, and an aperture which is provided in at least one of a face near the second optical element in the first optical element and a face near the first optical element in the second optical element.
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2.发明公开公开(公告)号：US20240230378A1
公开(公告)日：2024-07-11
申请号：US18617719
申请日：2024-03-27
Applicant: MITUTOYO CORPORATION
Inventor： Yoshiaki Kato , Kimitoshi Ono , Shunsuke Tanaka
CPC classification number: G01D5/2086 , G01B7/14
Abstract: A multi-degree-of-freedom displacement measuring device includes a rotary scale that has a scale pattern including a plurality of patterns that are arranged around a first rotation axis and arrayed along a circumference direction of the rotary scale, a detection head group including a plurality of detection heads, each of which is provided around the first rotation axis, is arranged on an installation face facing the rotary scale, and is configured to detect each of the plurality of patterns from the scale pattern, and a calculator configured to, based on detection values acquired by the plurality of detection heads, calculate a relative rotation angle around the first rotation axis, and calculate at least one of a relative movement amount in a direction along the first rotation axis and a relative movement amount in a direction along a second rotation axis orthogonal to the first rotation axis.
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公开(公告)号：US20220412722A1
公开(公告)日：2022-12-29
申请号：US17744220
申请日：2022-05-13
Applicant: Mitutoyo Corporation
Inventor： Kimitoshi Ono
Abstract: An optical sensor includes a radiation part that irradiates an object to be measured with line shaped light; and an imaging part that receives line shaped light reflected by the object to be measured and captures an image of the object to be measured in a predetermined exposure time. The radiation part includes a light generation part that generates the line shaped light, and a light vibration part that irradiates the object to be measured with the line shaped light generated by the light generation part while vibrating the line shaped light in a length direction during the exposure time.
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公开(公告)号：US10234310B2
公开(公告)日：2019-03-19
申请号：US15601333
申请日：2017-05-22
Applicant: MITUTOYO CORPORATION
Inventor： Kimitoshi Ono
Abstract: A light-emitting unit includes: a light source; and a reflector having reflection faces of first and second partial paraboloids, the first and second partial paraboloids being spaced from each other in an optical axis direction of the light source, the first and second partial paraboloids having a focal point on the light source, wherein: the second partial paraboloid is between the light source and the first partial paraboloid in the optical axis direction; the second partial paraboloid has a coefficient different from that of the first partial paraboloid; and the second partial paraboloid is positioned on a reflection direction side of a light from the light source reflected by the first partial paraboloid, with respect to a plane that is obtained on a presumption that the first partial paraboloid is extended to the light source side in accordance with the coefficient of the first partial paraboloid.
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公开(公告)号：US11467384B2
公开(公告)日：2022-10-11
申请号：US16679731
申请日：2019-11-11
Applicant: Mitutoyo Corporation
Inventor： Kenji Okabe , Tatsuya Nagahama , Toru Yaku , Kimitoshi Ono
Abstract: A telecentric optical apparatus that is capable of suppressing an increase in the number of components as well as achieving high precision optical axis alignment, is provided. The telecentric optical apparatus of the present invention is characterized in that it is provided with: a first telecentric lens surface that is provided on an object side; a second telecentric lens surface that is provided on an image side and that shares a focus position with the first telecentric lens surface; and an optical path trimming part that is provided, between the first telecentric lens surface and the second telecentric lens surface, in an outside region, which is located on a side further out than a light passing region having a center thereof located at the focus position, and that changes an optical path such that a light beam incident on the outside region is prevented from contributing to image formation.
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Patent Agency Ranking
公开(公告)号：US10520710B2
公开(公告)日：2019-12-31
申请号：US15139543
申请日：2016-04-27
Applicant: Mitutoyo Corporation
Inventor： Kenji Okabe , Tatsuya Nagahama , Toru Yaku , Kimitoshi Ono
IPC: G02B13/22
Abstract: A telecentric optical apparatus that is capable of suppressing an increase in the number of components as well as achieving high precision optical axis alignment, is provided. The telecentric optical apparatus of the present invention is characterized in that it is provided with: a first telecentric lens surface that is provided on an object side; a second telecentric lens surface that is provided on an image side and that shares a focus position with the first telecentric lens surface; and an optical path trimming part that is provided, between the first telecentric lens surface and the second telecentric lens surface, in an outside region, which is located on a side further out than a light passing region having a center thereof located at the focus position, and that changes an optical path such that a light beam incident on the outside region is prevented from contributing to image formation.
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7.发明申请公开(公告)号：US20170343388A1
公开(公告)日：2017-11-30
申请号：US15601333
申请日：2017-05-22
Applicant: MITUTOYO CORPORATION
Inventor： Kimitoshi Ono
CPC classification number: G01D5/305 , G01D5/34707 , G01D5/34715
Abstract: A light-emitting unit includes: a light source; and a reflector having reflection faces of first and second partial paraboloids, the first and second partial paraboloids being spaced from each other in an optical axis direction of the light source, the first and second partial paraboloids having a focal point on the light source, wherein: the second partial paraboloid is between the light source and the first partial paraboloid in the optical axis direction; the second partial paraboloid has a coefficient different from that of the first partial paraboloid; and the second partial paraboloid is positioned on a reflection direction side of a light from the light source reflected by the first partial paraboloid, with respect to a plane that is obtained on a presumption that the first partial paraboloid is extended to the light source side in accordance with the coefficient of the first partial paraboloid.
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公开(公告)号：US20240175729A1
公开(公告)日：2024-05-30
申请号：US18500545
申请日：2023-11-02
Applicant: MITUTOYO CORPORATION
Inventor： Akihide Kimura , Kimitoshi Ono , Keitaro Koyatsu
CPC classification number: G01D5/38 , G01D5/3473
Abstract: An optical encoder includes: a scale having a scale grating; a light source that emits light; and a light-receiving device that receives light that has passed through the scale. The optical encoder also has a shielding plate that shapes the beam shape, which is the shape of the light emitted from the light source. The shielding plate is disposed between the light source and the scale and defines the beam shape such that the shape of a long-length contour portion and the shape of a long-length side section have no correlation with each other. The long-length contour portion is a portion extending in the measurement direction at the contour of the beam shape of the light emitted to the light-receiving device via the scale, and the long-length side section is a section extending in the measurement direction at the contour of the light-receiving device.
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公开(公告)号：US20200073093A1
公开(公告)日：2020-03-05
申请号：US16679731
申请日：2019-11-11
Applicant: Mitutoyo Corporation
Inventor： Kenji Okabe , Tatsuya Nagahama , Toru Yaku , Kimitoshi Ono
Abstract: A telecentric optical apparatus that is capable of suppressing an increase in the number of components as well as achieving high precision optical axis alignment, is provided. The telecentric optical apparatus of the present invention is characterized in that it is provided with: a first telecentric lens surface that is provided on an object side; a second telecentric lens surface that is provided on an image side and that shares a focus position with the first telecentric lens surface; and an optical path trimming part that is provided, between the first telecentric lens surface and the second telecentric lens surface, in an outside region, which is located on a side further out than a light passing region having a center thereof located at the focus position, and that changes an optical path such that a light beam incident on the outside region is prevented from contributing to image formation.
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公开(公告)号：US20180106646A1
公开(公告)日：2018-04-19
申请号：US15784803
申请日：2017-10-16
Applicant: Mitutoyo Corporation
Inventor： Miyako Mizutani , Kimitoshi Ono , Fujio Maeda
IPC: G01D5/347
CPC classification number: G01D5/34715 , G01D5/34707
Abstract: Provided are a light source device that can achieve higher accuracy while maintaining reliability by reducing stray light, and a photoelectric encoder including the same. A light source device 2 includes a translucent member 10 configured to accommodate a light emitting unit 5 thereinside, and to make light emitted from the light emitting unit 5, into parallel light. The translucent member 10 includes an optical axis plane 11, an orthogonal plane 12, a reflection portion configured to make light from the light emitting unit 5, into parallel light, and a connection portion 14 formed by the optical axis plane 11 and the orthogonal plane 12 connecting to each other, and having a curved surface. A central axis AX of the curved surface is in an outside region of the translucent member 10, and a region between the optical axis plane 11 and the orthogonal plane 12.
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