Method and apparatus for visually inspecting transparent body and translucent body
US6618136B1 · kind B1 · utility
11Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/94
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method of visually inspecting a transparent body and a translucent body comprises applying light to a reverse surface of an object to be inspected by a transmission light source, and applying light, at a low angle, to at least one of an obverse surface and the reverse surface of the object to be inspected by a reflection light source. Concave defects and adherents of the object to be inspected are detected by use of transmitted light emitted from the transmission light source, and adherents of the object to be inspected are detected by use of reflected scattered light emitted from the reflection light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.