Patent ID: 11893429
Assignee: RICOH COMPANY, LTD.
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 7:
8. A calibration method performed by a colorimetric device, the method comprising:
emitting visible light to a first irradiation area of a white reference portion;
emitting ultraviolet light to a second irradiation area of the white reference portion, the second irradiation area different from the first irradiation area;
detecting the visible light reflected from the first irradiation area;
detecting the ultraviolet light reflected from the second irradiation area;
calibrating colorimetric information of an object based on the visible light and the ultraviolet light after the detecting the visible light and the detecting the ultraviolet light; and
measuring the colorimetric information of an object after the calibrating.