公开(公告)号：US11520015B2

公开(公告)日：2022-12-06

申请号：US16106309

申请日：2018-08-21

Applicant: TOPCON CORPORATION

Inventor： Yasushi Tanaka ,  Takaaki Saito ,  Ken'ichiro Yoshino ,  Mitsuru Kanokogi

IPC: G01S7/481 ,  G01S7/497 ,  G01J3/10 ,  G01S17/89 ,  G01S17/10 ,  G01S17/42

Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.

公开(公告)号：US10416291B2

公开(公告)日：2019-09-17

申请号：US15935138

申请日：2018-03-26

Applicant: TOPCON CORPORATION

Inventor： Hideki Morita ,  Ken'ichiro Yoshino ,  Yasushi Tanaka

IPC: G01S7/00 ,  G01S7/481 ,  G01C15/00 ,  G01B11/00 ,  G01S17/42 ,  G01S17/89

Abstract: A three-dimensional measurement device includes a light source unit that emits distance measurement light, a projection light optical system that causes the distance measurement light, emitted by the light source unit, to be emitted along a distance measurement light axis, a light receiving optical unit that receives the reflected distance measurement light, a light receiving and splitting unit that splits the reflected distance measurement light that has transmitted through the light receiving optical unit into first reflected split light and second reflected split light, attenuates intensity of the second reflected split light to be lower than intensity of the first reflected split light, and converts the first reflected split light and the second reflected split light into electrical signals, and angle detection units that detect a light emitting direction of the distance measurement light.

公开(公告)号：US11181639B2

公开(公告)日：2021-11-23

申请号：US15936628

申请日：2018-03-27

Applicant: TOPCON CORPORATION

Inventor： Hideki Morita ,  Ken'ichiro Yoshino ,  Yasushi Tanaka

IPC: G01S17/00 ,  G01S17/42 ,  G01B11/00 ,  G01C15/00 ,  G01S7/481

Abstract: Provided is a measurement device or the like that expands a dynamic range easily and promptly as appropriate even when three-dimensional data or the like on some parts of a measurement target object is not acquirable, so that the data can be acquired. A measurement device includes a light source unit that sequentially emits a plurality of beams of distance measurement light to an identical target object, based on predetermined fixed output information, a light reception unit that receives reflected light, from the target object, based on which the measurement device acquires measurement information, and an output value reducing unit and/or an input value reducing unit, the output value reducing unit reducing an output value of the light source unit, the input value reducing unit reducing an input value of the reflected light to the light reception unit.

公开(公告)号：US11733357B2

公开(公告)日：2023-08-22

申请号：US18050962

申请日：2022-10-28

Applicant: TOPCON CORPORATION

Inventor： Yasushi Tanaka ,  Takaaki Saito ,  Ken'ichiro Yoshino ,  Mitsuru Kanokogi

IPC: G01S7/481 ,  G01S7/497 ,  G01J3/10 ,  G01S17/89 ,  G01S17/10 ,  G01S17/42

CPC classification number: G01S7/4817 ,  G01J3/108 ,  G01S7/497 ,  G01S17/10 ,  G01S17/42 ,  G01S17/89 ,  G01N2201/0697 ,  G01S7/4813

Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.

公开(公告)号：US20180284281A1

公开(公告)日：2018-10-04

申请号：US15936628

申请日：2018-03-27

Applicant: TOPCON CORPORATION

Inventor： Hideki Morita ,  Ken'ichiro Yoshino ,  Yasushi Tanaka

IPC: G01S17/42 ,  G01S7/481

Abstract: Provided is a measurement device or the like that expands a dynamic range easily and promptly as appropriate even when three-dimensional data or the like on some parts of a measurement target object is not acquirable, so that the data can be acquired. A measurement device includes a light source unit that sequentially emits a plurality of beams of distance measurement light to an identical target object, based on predetermined fixed output information, a light reception unit that receives reflected light, from the target object, based on which the measurement device acquires measurement information, and an output value reducing unit and/or an input value reducing unit, the output value reducing unit reducing an output value of the light source unit, the input value reducing unit reducing an input value of the reflected light to the light reception unit.