System and method for detecting optical defects in transparencies
US8917312B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2009 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/9586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical defect detection system is provided for recording an image of a transparency for detecting optical defects therein. The transparency may be formed with a contour. The defect detection system may comprise a light source, a diffuser and an image recording device for recording images of the transparency. The light source is configured to emit light and may be positioned adjacent one of the sides of the transparency. The image recording device may be positioned on a side of the transparency opposite the diffuser. The diffuser may be contoured complementary to the contour of the transparency and may be positioned between the light source and the transparency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.