公开(公告)号：US20200378887A1

公开(公告)日：2020-12-03

申请号：US16764188

申请日：2018-09-11

Applicant: KONICA MINOLTA, INC.

Inventor： Yoshitaka TERAOKA ,  Tomomi SETOGUCHI

IPC: G01N21/25 ,  G01N21/55

Abstract: A multi-angle colorimeter includes an index calculation unit that calculates, based on a predetermined calculation formula, an index corresponding to luminance of a glittering material used in metallic coating or pearl coating by using optical parameters for color evaluation of the metallic coating or pearl coating on a surface of an object.

公开(公告)号：US20230048563A1

公开(公告)日：2023-02-16

申请号：US17759074

申请日：2020-12-23

Applicant: Konica Minolta, Inc.

Inventor： Yoshitaka TERAOKA ,  Tomomi SETOGUCHI

IPC: G01J3/46

Abstract: A colorimeter comprises a colorimetric value obtaining means to obtain a colorimetric value by performing color measurement on a measuring sample; a reference value obtaining means to obtain a reference value; a computing means to, using a color difference formula, ΔE*94, compute ΔL*94, Δa*94, and Δb*94 with reference to the colorimetric value obtained by the colorimetric value obtaining portion and the reference value obtained by the reference value obtaining portion, the ΔL*94, Δa*94, and Δb*94 having a relation of ΔE*94=[(ΔL*94)2+(Δa*94)2*(Δb*94)2]1/2 where the ΔL*94 corresponds to a difference in lightness, the Δa*94 corresponds to a difference in red and green, and the Δb*94 corresponds to a difference in blue and yellow; and a display means to display computational results obtained by the computing means.

公开(公告)号：US20190293560A1

公开(公告)日：2019-09-26

申请号：US16095263

申请日：2017-04-19

Applicant: KONICA MINOLTA, INC.

Inventor： Yuta YAMANOI ,  Tomomi SETOGUCHI ,  Yoshitaka TERAOKA

IPC: G01N21/57 ,  G01N21/956 ,  G01N21/25 ,  G01J3/50 ,  G01J3/02

Abstract: A difference between a peak reflectance of a first wavelength component and a reflectance of a second wavelength component having a predetermined wavelength among reflectances of a plurality of wavelength components constituting reflected light in a highlight direction from a glitter material-containing coating film is set as a first difference value. Reflectance is measured of the first and second wavelength components of the reflected light in the highlight direction for the coating film corresponding to a measurement object. A first difference value is calculated by using the measurement result. A storage stores in advance correlation information indicating a correlation between the first difference value and an index value indicating predetermined physical characteristics of a glitter material contained in the coating film. An index value calculator calculates the index value of the coating film corresponding to the measurement object by using the correlation information and the first difference value calculated in the first calculator.