Method and apparatus for the automatic inspection of optically transmissive objects having a lens portion
US6201600A · kind A · utility
25Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/0278
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for inspecting intraocular lenses which utilizes a light source and an electronic camera for obtaining images of the lens under test. A series of masks is utilized during the obtaining of the images and includes a bright field mask which allows the transmission of light through the lens, a dark field mask which blocks a portion of the light which would normally pass through the lens and a transition mask which is constituted by fine stripes. A signal processor analyzes the images obtained utilizing the masks and provides an indication of predetermined defects in the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.