Patent ID: 11930600
Assignee: CKD CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A three-dimensional measurement method using a measurement module that includes an irradiator and an imaging device and that is positioned with respect to a target measurement area on a measured object and performing three-dimensional measurement to a plurality of measurement targets placed in the target measurement area by a predetermined three-dimensional measurement technique, the method comprising:
obtaining, based on image data taken by irradiating the target measurement area with predetermined light, target height information on the measurement object within the target measurement area;
calculating, based on the target height information, reference height information on a reference surface of each of the measurement targets within the target measurement area;
specifying, based on the reference height information and with respect to each of the measurement targets, a required focusing range for imaging an entire range in a height direction of each of the measurement targets in a focusing state;
mapping, based on the required focusing range and a field of depth of the imaging device, a height position of the measurement module to each of the measurement targets at the height position;
moving the measurement module in the height direction and of successively positioning the measurement module at a predetermined height position determined by the mapping; and
a three-dimensional measurement process of performing, based on image data taken by irradiating the target measurement area with predetermined patterned light, three-dimensional measurement to the measurement targets at the predetermined height position.