US 12,359,974 B2
Colorimetric apparatus
Hiroshi Yoshida, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Feb. 8, 2023, as Appl. No. 18/166,074.
Claims priority of application No. 2022-018523 (JP), filed on Feb. 9, 2022.
Prior Publication US 2023/0251138 A1, Aug. 10, 2023
Int. Cl. G01J 3/52 (2006.01); G01B 21/22 (2006.01)
CPC G01J 3/52 (2013.01) [G01B 21/22 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A colorimetric apparatus comprising:
an opening portion that is disposed at a bottom of an apparatus main body and that introduces light arriving from a measurement target to inside the apparatus main body;
an incident light processing unit that processes light incident through the opening portion;
a rotor that is provided at the bottom of the apparatus main body and is in contact with the measurement target, the rotor having an elliptical shape and being driven to rotate about a rotary shaft when the apparatus main body moves in a predetermined direction;
a detector that detects displacement of the rotary shaft in a direction in which the rotary shaft advances and retreats with respect to the measurement target as the rotor rotates; and
a control unit that receives a signal from the incident light processing unit and the detector.