Telecentric imaging system optical inspection machine using the same and method for correcting optical distortion produced thereby
US5008743A · kind A · utility
39Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Mar 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A telecentric imaging system includes a Fresnel lens mountable in proximity to an object to be imaged, a source of light for illuminating the object, and an aperture stop located at least in the telecentric imaging system is incorporated into an optical inspection machine which permits optical distortion produced by the telecentric imaging system to be corrected using a look-up table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.