Steel sheet inspection device, steel sheet inspection method, and steel sheet manufacturing method
US10031068B2 · kind B2 · utility
1Cited by
3References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 25, 2013 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Jan 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8609
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A steel sheet inspection device includes: a magnetooptic element that is able to detect, as an optical property, a magnetic domain structure of a steel sheet to be inspected; a light source that irradiates the magnetooptic element with linearly polarized light; a detector that detects the linearly polarized light with a polarization plane rotated according to the magnetic domain structure of the steel sheet transferred to the magnetooptic element; and a drive mechanism that drives at least the magnetooptic element so as to contact and separate the steel sheet and the magnetooptic element with and from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.