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

Claim 0:
1. A colorimetric device comprising:
a white reference portion having:
a first irradiation area; and
a second irradiation area different from the first irradiation area;

a light emitter including:
a first light source configured to emit visible light to the first irradiation area; and
a second light source configured to emit ultraviolet light to the second irradiation area;

a sensor configured to detect the visible light reflected from the first irradiation area and the ultraviolet light reflected from the second irradiation area; and
circuitry configured to:
measure colorimetric information of an object; and
calibrate the colorimetric information of the object based on the visible light and the ultraviolet light detected by the sensor.