公开(公告)号：US20180003628A1

公开(公告)日：2018-01-04

申请号：US15545387

申请日：2016-01-19

Applicant: TOPCON CORPORATION

Inventor： Taichi YUASA

IPC: G01N21/359 ,  G01N33/38

CPC classification number: G01N21/359 ,  G01N21/3563 ,  G01N33/383 ,  G01N2201/061 ,  G01N2201/0637 ,  G01N2201/068

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：US20190069476A1

公开(公告)日：2019-03-07

申请号：US16106201

申请日：2018-08-21

Applicant: TOPCON CORPORATION

Inventor： Taichi YUASA

IPC: A01C21/00 ,  G01J3/02 ,  G01J3/10 ,  G01J3/427 ,  G01N21/3563

CPC classification number: A01C21/007 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/024 ,  G01J3/0272 ,  G01J3/0286 ,  G01J3/0289 ,  G01J3/0291 ,  G01J3/10 ,  G01J3/108 ,  G01J3/427 ,  G01J2003/104 ,  G01J2003/4275 ,  G01N21/3563 ,  G01N21/359 ,  G01N2021/1797 ,  G01N2021/3181 ,  G01N2021/8466 ,  G01N2201/0214 ,  G01N2201/0221 ,  G01N2201/0627 ,  G01N2201/0691

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.

公开(公告)号：US20190094341A1

公开(公告)日：2019-03-28

申请号：US16122054

申请日：2018-09-05

Applicant: TOPCON CORPORATION

Inventor： Ikuo ISHINABE ,  Taichi YUASA

IPC: G01S7/48 ,  G01S7/497 ,  G01S7/481 ,  G01S17/08

Abstract: A method of correcting a measurement value of a laser scanner includes: in a laser scanner including a light emitting unit, a light receiving unit, a distance measuring unit, an optical axis deflecting unit having at least a pair of prisms deflecting a distance measuring light and a reflected distance measuring light, and an emitting direction detecting unit detecting a deflection angle and an emitting direction of the distance measuring light from the optical axis deflecting unit, (a) measuring a distance to a measurement point, (b) detecting rotation angles of the prisms, and (c) obtaining, based on rotation angles of the prisms, a true distance measurement value corrected for a length of an optical path length difference in light emission and/or light reception caused according to the rotation angles of the prisms by subtracting the optical path length difference from a distance measurement value of the distance measuring unit.