Inspection method based on captured image and inspection device
US8497985B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2008 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Feb 5, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of inspection and inspection apparatus able to use a captured image to more precisely inspect the state of film, defect parts, etc. at a surface of an object under inspection are provided.A method of inspection and inspection apparatus illuminating a surface of an object under inspection 10 by white light from an illumination unit LO while scanning the surface of the object under inspection 10 by an image capturing unit 100 to acquire a captured image and using the captured image to inspect a state of the surface of the object under inspection 10, which changes a state of polarization of light LR striking the image capturing unit 100 from an illuminated location of the object under inspection 10 and obtains a plurality of captured images based on light of different polarization states LR striking the image capturing unit 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.