公开(公告)号：US11629959B2

公开(公告)日：2023-04-18

申请号：US16944252

申请日：2020-07-31

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa

IPC: G01C15/00 ,  G01C3/00 ,  G01C15/06

Abstract: A surveying instrument includes a distance measuring module for measuring a distance to the object, in which the distance measuring module includes a light projecting optical system configured to project a distance measuring light and a light receiving optical system configured to receive a reflected distance measuring light, the light receiving optical system includes a prism having a quadrangular shape and a photodetector, the prism includes a first plane, a second plane, a third plate and a fourth plane, configured to enter the reflected distance measuring light in the first plane, sequentially internally reflect on the second plane, the first plane, and the third plane, transmit through the fourth plane, and project, and the reflect distance measuring light projected from the prism configured to be received by the photodetector.

公开(公告)号：US20230033565A1

公开(公告)日：2023-02-02

申请号：US17874464

申请日：2022-07-27

Applicant: TOPCON CORPORATION

Inventor： Taichi Yuasa

IPC: G01S17/10 ,  G01S7/481 ,  G01S7/4865 ,  G01S7/4861

Abstract: Provided is a surveying instrument including a distance measuring light projecting module configured to include a light emitting module which projects a laser beam having a predetermined wavelength as a distance measuring light to an object, a distance measuring light receiving module configured to include a photodetector which receives a reflected distance measuring light from the object, and an arithmetic control module configured to control the light emitting module and 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 light emitting module is configured to include at least two light emitters, at least one of the light emitters is configured to project the distance measuring light, and each light emitter is configured in such a manner that the laser beam is substantially coaxially projected.

公开(公告)号：US11536567B2

公开(公告)日：2022-12-27

申请号：US16123196

申请日：2018-09-06

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa ,  Ken-ichiro Yoshino

IPC: G01C15/00 ,  G01S17/10 ,  G01S7/48 ,  G01C3/08 ,  G01S7/484 ,  G01S7/4861 ,  G01J5/00 ,  G01J5/02 ,  G01S7/481 ,  G01C1/04 ,  G02B27/10

Abstract: A surveying instrument comprises a light projecting optical system for projecting a distance measuring light to a predetermined measuring point, a light receiving optical system for receiving a reflected distance measuring light and an infrared light from the measuring point, and an arithmetic control module for controlling a distance measurement and a temperature measurement based on light receiving results of the reflected distance measuring light and the infrared light, and the arithmetic control module measures a distance to the measuring point based on light receiving results of the reflected distance measuring light received by a photodetector of the light receiving optical system, and measures a temperature of the measuring point based on light receiving results of the infrared light received by a temperature sensor of the light receiving optical system.

公开(公告)号：US20210285765A1

公开(公告)日：2021-09-16

申请号：US17196085

申请日：2021-03-09

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa

IPC: G01C15/00

Abstract: A surveying instrument includes a distance measuring unit which measures a distance to an object, wherein the distance measuring unit comprises a light emitter configured to change an emission repetition frequency and the peak power of pulses of a distance measuring light to at least two, a light projecting optical system configured to project the distance measuring light, and a light receiving optical system configured to cause a photodetector to receive the reflected distance measuring light, wherein the light receiving optical system has a light amount adjusting member which is insertable and removable with respect to an optical axis of the reflected distance measuring light, and the light amount adjusting member configured to adjust a light receiving amount of the reflected distance measuring light in correspondence with the emission repetition frequency and the peak power of the pulses.

公开(公告)号：US10352851B2

公开(公告)日：2019-07-16

申请号：US15545387

申请日：2016-01-19

Applicant: TOPCON CORPORATION

Inventor： Taichi Yuasa

IPC: G01N33/38 ,  G01N21/359 ,  G01N21/3563

Abstract: A spectroscopic measuring device includes a halogen lamp as a light source, a lens of an irradiating system, a mirror, and a spectrometer. The lens of the irradiating optical system emits light from the halogen lamp to a measurement object. The mirror is an optical member, and the mirror is arranged coaxial with the lens and conducts detecting light between the halogen lamp and the measurement object, to the spectrometer. The spectrometer is an analyzing part and analyzes material of the measurement object on the basis of the light received via the mirror. The light from the halogen lamp to the measurement object passes through the peripheral part of the optical axis of the lens, and the light to be received by the spectrometer passes through the center part of the optical axis of the lens, at the position of the mirror.

公开(公告)号：US20190078883A1

公开(公告)日：2019-03-14

申请号：US16123196

申请日：2018-09-06

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa ,  Ken-ichiro Yoshino

IPC: G01C15/00 ,  G01S17/89 ,  G01S17/10 ,  G01S7/48 ,  G01S7/481 ,  G01S7/484 ,  G01S7/486 ,  G01J5/00 ,  G01J5/02 ,  G01C3/08

Abstract: A surveying instrument comprises a light projecting optical system for projecting a distance measuring light to a predetermined measuring point, a light receiving optical system for receiving a reflected distance measuring light and an infrared light from the measuring point, and an arithmetic control module for controlling a distance measurement and a temperature measurement based on light receiving results of the reflected distance measuring light and the infrared light, and the arithmetic control module measures a distance to the measuring point based on light receiving results of the reflected distance measuring light received by a photodetector of the light receiving optical system, and measures a temperature of the measuring point based on light receiving results of the infrared light received by a temperature sensor of the light receiving optical system.

公开(公告)号：US20180031677A1

公开(公告)日：2018-02-01

申请号：US15647391

申请日：2017-07-12

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa

IPC: G01S7/481 ,  G01S17/08

Abstract: An optical system of a laser scanner comprising: a light projecting system for projecting a distance measuring light, a scanning mirror for rotatably irradiating the distance measuring light from the light projecting system around a single axis and for making a reflected distance measuring light from an object to be measured enter a light receiving system, a transmission window for accommodating the scanning mirror and through which the distance measuring light and the reflected distance measuring light are transmitted, and a correction optical component for offsetting an optical action of the transmission window, which is provided at least in a middle of an irradiating optical path of the distance measuring light.

公开(公告)号：US20170102454A1

公开(公告)日：2017-04-13

申请号：US15284908

申请日：2016-10-04

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa

IPC: G01S7/481 ,  G01S17/08

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.