Patent ID: 11972555
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 0:
1. A product-inspection apparatus comprising:
a stage on which an object to be inspected is placed and then vibrated at different vibration frequencies in a stepwise manner, the object to be inspected including a container of powder, the vibration causing any foreign substance in the powder to migrate towards a top of the powder;
a light source configured to output light onto the top of the powder;
an an image sensor configured to capture images of the top of the powder at a frame rate equal to or higher than a maximum vibration frequency at which the object to be inspected is vibrated;
a processor; and
a memory storing instructions executable by the processor to determine whether or not the powder includes any foreign substance based on the captured images.