Checking device and checking method
AssigneeSumitomo Chemical Company, Limited
InventorsKoji Kashu, Yoshitaka Shinomiya, Daizaburo Yashiki
Life of this patent
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Abstract
The present invention makes it possible to check a target object highly accurately and quickly. In a sensor having an electromagnetic wave reception region, suitability of portions for capturing an image of a subject which moves fast is heightened as a distance from a center increases in a plan view of a circular profile surface.
Claims10
A checking device for checking a target object having a circular profile surface, which is a surface whose profile is a circle, while rotating the target object about an axis that passes through a center of the circle and extends in a direction substantially perpendicular to the circular profile surface, said checking device comprising:
- at least one electromagnetic wave source which irradiates the circular profile surface of the target object, which is being checked, with an electromagnetic wave;
- and
- an image capturing section which has an electromagnetic wave reception region for receiving the electromagnetic wave which has passed through the target object which is being checked,
- in the image capturing section, suitability of portions of the electromagnetic wave reception region for capturing an image of a subject which moves fast being heightened as a distance from the center of the circle increases in a plan view of the circular profile surface of the target object which is being checked.
A checking method for checking a target object having a circular profile surface, which is a surface whose profile is a circle, while rotating the target object about an axis that passes through a center of the circle and extends in a direction substantially perpendicular to the circular profile surface, said checking method comprising the steps of:
- irradiating the circular profile surface of the target object, which is being checked, with an electromagnetic wave;
- and
- receiving, by an electromagnetic wave reception region included in an image capturing section, the electromagnetic wave which has passed through the target object which is being checked,
- in the image capturing section, suitability of portions of the electromagnetic wave reception region for capturing an image of a subject which moves fast being heightened as a distance from the center of the circle increases in a plan view of the circular profile surface of the target object which is being checked.
Dependencies are inferred from the claim text.