Patent ID: 11936985
Assignee: OMRON CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A defect inspection method using an appearance inspection device comprising:
an imaging unit configured to capture an image of an inspection region on an inspection target;
a height measurement unit configured to emit measurement light and receive reflected light of the measurement light to measure a height of a predetermined place in the inspection target; and
a moving mechanism configured to relatively move the imaging unit, the height measurement unit, and the inspection target to change the inspection region captured by the imaging unit and the predetermined place where the height is measured by the height measurement unit, the method comprising:
determining whether the inspection target has a defect in the inspection region based on an image of the inspection region captured by the imaging unit and information on the height of the predetermined place measured by the height measurement unit; and
restricting determination of whether there is the defect based on the information on the height of the predetermined place measured by the height measurement unit when a predetermined restricted region in the inspection target is irradiated with the measurement light.