Colorimetric device, image forming apparatus, and calibration method
AssigneeRicoh Company, Ltd.
InventorsRie Suzuki, Tatsuya Ishii
Life of this patent
Estimating the term…
Abstract
A colorimetric device includes: 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 a processor 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.
Claims8
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.
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.
Dependencies are inferred from the claim text.