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公开(公告)号：US10422861B2
公开(公告)日：2019-09-24
申请号：US15284908
申请日：2016-10-04
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: The invention provides an electro-optical distance measuring instrument, which comprises a light projecting optical system for projecting a distance measuring light as emitted from a distance measuring light source on a distance measuring optical axis, and a light receiving optical system for receiving a reflected distance measuring light from an object to be measured and for guiding to a light receiving element, wherein the light projecting optical system and the light receiving optical system are disposed so that a projection optical axis and a light receiving optical axis cross each other, an optical path splitting component for reflecting the distance measuring light to a crossing position of the projection optical axis and the light receiving optical axis and for passing through the reflected distance measuring light is provided, and optical path length adjusting components for correcting an optical path length of the reflected distance measuring light are disposed on the optical path of the reflected distance measuring light.
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公开(公告)号：US20170102265A1
公开(公告)日：2017-04-13
申请号：US15284886
申请日：2016-10-04
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: The invention provides a spectroscopic instrument, which comprises a projecting optical system for projecting a projecting light emitted from a light source, a photodetecting optical system for receiving a reflection light from an object to be measured and for guiding to a photodetection member, and a spectroscope for detecting a condition of the object to be measured based on the reflection light as received by the photodetection member, wherein the projecting optical system and the photodetecting optical system have a projecting system chromatic aberration decreasing component and a photodetecting system chromatic aberration decreasing component which eliminate chromatic aberrations, respectively.
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公开(公告)号：US11668567B2
公开(公告)日：2023-06-06
申请号：US17114913
申请日：2020-12-08
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: A surveying instrument includes a distance measuring unit which irradiates an object with the distance measuring light and measures a distance to the object based on the reflected distance measuring light from the object, wherein the distance measuring unit includes a distance measuring light projecting module configured to project the distance measuring light and a distance measuring light receiving module configured to receive the reflected distance measuring light, the distance measuring light receiving module includes a dichroic prism and a light receiving module, and the dichroic prism is configured in such a manner that the reflected distance measuring light is internally reflected in the dichroic prism at least three times and then received by the light receiving module.
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公开(公告)号：US20230098766A1
公开(公告)日：2023-03-30
申请号：US17948269
申请日：2022-09-20
Applicant: TOPCON CORPORATION
Inventor： Taichi Yuasa
Abstract: A surveying instrument include a distance measuring light projecting module having a light emitting module configured to project a distance measuring light to an object and a one-dimensional diffusion optical member configured to diffuse the distance measuring light in a one-dimensional direction, a distance measuring light receiving module having a photodetector configured to receive a reflected distance measuring light from the object, and an arithmetic control module configured to control the light emitting module and calculate a distance to the object based on a light reception result of the reflected distance measuring light with respect to the photodetector, wherein the light emitting module has at least two light emitters laminated in one direction, and the one-dimensional diffusion optical member is configured to diffuse the distance measuring light in a laminating direction of the light emitters.
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公开(公告)号：US11607123B2
公开(公告)日：2023-03-21
申请号：US16732410
申请日：2020-01-02
Applicant: TOPCON CORPORATION
Inventor： Tatsuo Yamaguchi , Michiko Nakanishi , Taichi Yuasa
Abstract: An ophthalmologic apparatus includes: an optical system configured to acquire data of a subject's eye; a housing unit configured to house the optical system; and an attachment member including a holding member configured to hold a face of the subject movably in a state where a peripheral site of the subject's eye is in contact with the holding member, a passing part through which an optical axis of the optical system passes being formed in the holding member, and the attachment member configured to be detachable between the housing unit and the subject's eye.
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Patent Agency Ranking
公开(公告)号：US20220026206A1
公开(公告)日：2022-01-27
申请号：US17383568
申请日：2021-07-23
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: Provided is a surveying instrument including a distance measuring light projector configured to project a distance measuring light to an object, a distance measuring light receiver having a photodetector configured to receive a reflected distance measuring light from the object, a tracking light projector configured to project a tracking light to the object, and a tracking light receiver having a tracking photodetector configured to receive a reflected tracking light from the object, in which the distance measuring light receiver and the tracking light receiver have a receiving prism, and the receiving prism is configured to internally reflect the reflected distance measuring light and the reflected tracking light more than once, then separate the reflected distance measuring light from the reflected tracking light, cause the reflected distance measuring light and the reflected tracking light to be received by the photodetector and the tracking photodetector.
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公开(公告)号：US20210190493A1
公开(公告)日：2021-06-24
申请号：US17114913
申请日：2020-12-08
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: A surveying instrument includes a distance measuring unit which irradiates an object with the distance measuring light and measures a distance to the object based on the reflected distance measuring light from the object, wherein the distance measuring unit includes a distance measuring light projecting module configured to project the distance measuring light and a distance measuring light receiving module configured to receive the reflected distance measuring light, the distance measuring light receiving module includes a dichroic prism and a light receiving module, and the dichroic prism is configured in such a manner that the reflected distance measuring light is internally reflected in the dichroic prism at least three times and then received by the light receiving module.
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公开(公告)号：US10561060B2
公开(公告)日：2020-02-18
申请号：US16106201
申请日：2018-08-21
Applicant: TOPCON CORPORATION
Inventor： Taichi Yuasa
IPC: G01J3/02 , A01C21/00 , G01J3/10 , G01J3/427 , G01N21/3563 , G01N21/31 , G01N21/359 , G01N21/17
Abstract: A light source section configured to couple a plurality of laser beams having different wavelengths and emit measuring light; an illuminating section configured to illuminate a measurement target at a predetermined angle; a light receiving section configured to receive reflected measuring light from the measurement target; and a controlling section configured to compute a reflectance at each of the wavelengths, based on a light receiving result. The light source section includes: a first and a second light source configured to emit each laser beams having different wavelengths; and a dichroic mirror disposed in optical axes of the laser beams intersected, configured to combine the laser beams. The light receiving section includes: a first, a second and a third light receiving unit configured to receive the reflected measuring light from different distance. The controlling section is configured to select which of results from each light receiving unit to use.
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公开(公告)号：US20170168141A1
公开(公告)日：2017-06-15
申请号：US15378568
申请日：2016-12-14
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
CPC classification number: G01S7/4811 , G01S7/4812 , G01S7/4817 , G01S17/08 , G01S17/42 , G01S17/66
Abstract: The invention provides an electronic distance measuring instrument, which comprises a light projecting optical system for emitting a distance measuring light onto a distance measuring optical axis and a light receiving optical system for leading a reflected distance measuring light to a photodetector, wherein the light projecting optical system has a projection optical axis deflecting unit for deflecting a projection optical axis so that the projection optical axis coincides with a light receiving optical axis, the light receiving optical system has a first light receiving optical axis deflecting unit and a second light receiving optical axis deflecting unit which are arranged on a same plane, the photodetector is arranged on a plane different from the first light receiving optical axis deflecting unit and the second light receiving optical axis deflecting unit.
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公开(公告)号：US20230280160A1
公开(公告)日：2023-09-07
申请号：US18115417
申请日：2023-02-28
Applicant: TOPCON CORPORATION
Inventor： Taichi Yuasa
IPC: G01C15/00 , G01S7/481 , G01S7/4865 , G01S17/10
CPC classification number: G01C15/002 , G01S7/4812 , G01S7/4865 , G01S17/10
Abstract: Provided is a surveying instrument including a distance measuring light projecting module configured to project a distance measuring light to an object, a distance measuring light receiving module having a photodetector configured to receive a reflected distance measuring light from the object, and an arithmetic control module configured to calculate a distance to the object based on a light reception result of the reflected distance measuring light with respect to the photodetector, in which the distance measuring light projecting module has a reflecting prism having two prisms joined together, a beam splitter film having a predetermined reflectance and transmittance is formed on a joined surface of the reflecting prism, and the reflecting prism is configured to deflect an optical axis of the distance measuring light via the beam splitter film so as to coincide with an optical axis of the reflected distance measuring light.
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